|
|
| 27行: |
27行: |
| | >ffmpeg -i [ファイル名] | | >ffmpeg -i [ファイル名] |
| | </syntaxhighlight2> | | </syntaxhighlight2> |
| − | 5.1 Stream specifiers
| |
| − | Some options are applied per-stream, e.g. bitrate or codec. Stream specifiers are used to precisely specify which stream(s) a given option belongs to.
| |
| | | | |
| − | A stream specifier is a string generally appended to the option name and separated from it by a colon. E.g. -codec:a:1 ac3 contains the a:1 stream specifier, which matches the second audio stream. Therefore, it would select the ac3 codec for the second audio stream.
| |
| | | | |
| − | A stream specifier can match several streams, so that the option is applied to all of them. E.g. the stream specifier in -b:a 128k matches all audio streams.
| + | [[⧅ffmpeg 全てのオプション一覧と可能な限りの説明]] |
| − | | + | |
| − | An empty stream specifier matches all streams. For example, -codec copy or -codec: copy would copy all the streams without reencoding.
| + | |
| − | | + | |
| − | Possible forms of stream specifiers are:
| + | |
| − | | + | |
| − | stream_index
| + | |
| − | Matches the stream with this index. E.g. -threads:1 4 would set the thread count for the second stream to 4. If stream_index is used as an additional stream specifier (see below), then it selects stream number stream_index from the matching streams. Stream numbering is based on the order of the streams as detected by libavformat except when a program ID is also specified. In this case it is based on the ordering of the streams in the program.
| + | |
| − | | + | |
| − | stream_type[:additional_stream_specifier]
| + | |
| − | stream_type is one of following: ’v’ or ’V’ for video, ’a’ for audio, ’s’ for subtitle, ’d’ for data, and ’t’ for attachments. ’v’ matches all video streams, ’V’ only matches video streams which are not attached pictures, video thumbnails or cover arts. If additional_stream_specifier is used, then it matches streams which both have this type and match the additional_stream_specifier. Otherwise, it matches all streams of the specified type.
| + | |
| − | | + | |
| − | p:program_id[:additional_stream_specifier]
| + | |
| − | Matches streams which are in the program with the id program_id. If additional_stream_specifier is used, then it matches streams which both are part of the program and match the additional_stream_specifier.
| + | |
| − | | + | |
| − | #stream_id or i:stream_id
| + | |
| − | Match the stream by stream id (e.g. PID in MPEG-TS container).
| + | |
| − | | + | |
| − | m:key[:value]
| + | |
| − | Matches streams with the metadata tag key having the specified value. If value is not given, matches streams that contain the given tag with any value.
| + | |
| − | | + | |
| − | u
| + | |
| − | Matches streams with usable configuration, the codec must be defined and the essential information such as video dimension or audio sample rate must be present.
| + | |
| − | | + | |
| − | Note that in ffmpeg, matching by metadata will only work properly for input files.
| + | |
| − | | + | |
| − | 5.2 Generic options
| + | |
| − | These options are shared amongst the ff* tools.
| + | |
| − | | + | |
| − | -L
| + | |
| − | Show license.
| + | |
| − | | + | |
| − | -h, -?, -help, --help [arg]
| + | |
| − | Show help. An optional parameter may be specified to print help about a specific item. If no argument is specified, only basic (non advanced) tool options are shown.
| + | |
| − | | + | |
| − | Possible values of arg are:
| + | |
| − | | + | |
| − | long
| + | |
| − | Print advanced tool options in addition to the basic tool options.
| + | |
| − | | + | |
| − | full
| + | |
| − | Print complete list of options, including shared and private options for encoders, decoders, demuxers, muxers, filters, etc.
| + | |
| − | | + | |
| − | decoder=decoder_name
| + | |
| − | Print detailed information about the decoder named decoder_name. Use the -decoders option to get a list of all decoders.
| + | |
| − | | + | |
| − | encoder=encoder_name
| + | |
| − | Print detailed information about the encoder named encoder_name. Use the -encoders option to get a list of all encoders.
| + | |
| − | | + | |
| − | demuxer=demuxer_name
| + | |
| − | Print detailed information about the demuxer named demuxer_name. Use the -formats option to get a list of all demuxers and muxers.
| + | |
| − | | + | |
| − | muxer=muxer_name
| + | |
| − | Print detailed information about the muxer named muxer_name. Use the -formats option to get a list of all muxers and demuxers.
| + | |
| − | | + | |
| − | filter=filter_name
| + | |
| − | Print detailed information about the filter named filter_name. Use the -filters option to get a list of all filters.
| + | |
| − | | + | |
| − | bsf=bitstream_filter_name
| + | |
| − | Print detailed information about the bitstream filter named bitstream_filter_name. Use the -bsfs option to get a list of all bitstream filters.
| + | |
| − | | + | |
| − | protocol=protocol_name
| + | |
| − | Print detailed information about the protocol named protocol_name. Use the -protocols option to get a list of all protocols.
| + | |
| − | | + | |
| − | -version
| + | |
| − | Show version.
| + | |
| − | | + | |
| − | -formats
| + | |
| − | Show available formats (including devices).
| + | |
| − | | + | |
| − | -demuxers
| + | |
| − | Show available demuxers.
| + | |
| − | | + | |
| − | -muxers
| + | |
| − | Show available muxers.
| + | |
| − | | + | |
| − | -devices
| + | |
| − | Show available devices.
| + | |
| − | | + | |
| − | -codecs
| + | |
| − | Show all codecs known to libavcodec.
| + | |
| − | | + | |
| − | Note that the term ’codec’ is used throughout this documentation as a shortcut for what is more correctly called a media bitstream format.
| + | |
| − | | + | |
| − | -decoders
| + | |
| − | Show available decoders.
| + | |
| − | | + | |
| − | -encoders
| + | |
| − | Show all available encoders.
| + | |
| − | | + | |
| − | -bsfs
| + | |
| − | Show available bitstream filters.
| + | |
| − | | + | |
| − | -protocols
| + | |
| − | Show available protocols.
| + | |
| − | | + | |
| − | -filters
| + | |
| − | Show available libavfilter filters.
| + | |
| − | | + | |
| − | -pix_fmts
| + | |
| − | Show available pixel formats.
| + | |
| − | | + | |
| − | -sample_fmts
| + | |
| − | Show available sample formats.
| + | |
| − | | + | |
| − | -layouts
| + | |
| − | Show channel names and standard channel layouts.
| + | |
| − | | + | |
| − | -colors
| + | |
| − | Show recognized color names.
| + | |
| − | | + | |
| − | -sources device[,opt1=val1[,opt2=val2]...]
| + | |
| − | Show autodetected sources of the input device. Some devices may provide system-dependent source names that cannot be autodetected. The returned list cannot be assumed to be always complete.
| + | |
| − | | + | |
| − | ffmpeg -sources pulse,server=192.168.0.4
| + | |
| − | -sinks device[,opt1=val1[,opt2=val2]...]
| + | |
| − | Show autodetected sinks of the output device. Some devices may provide system-dependent sink names that cannot be autodetected. The returned list cannot be assumed to be always complete.
| + | |
| − | | + | |
| − | ffmpeg -sinks pulse,server=192.168.0.4
| + | |
| − | -loglevel [flags+]loglevel | -v [flags+]loglevel
| + | |
| − | Set logging level and flags used by the library.
| + | |
| − | | + | |
| − | The optional flags prefix can consist of the following values:
| + | |
| − | | + | |
| − | ‘repeat’
| + | |
| − | Indicates that repeated log output should not be compressed to the first line and the "Last message repeated n times" line will be omitted.
| + | |
| − | | + | |
| − | ‘level’
| + | |
| − | Indicates that log output should add a [level] prefix to each message line. This can be used as an alternative to log coloring, e.g. when dumping the log to file.
| + | |
| − | | + | |
| − | Flags can also be used alone by adding a ’+’/’-’ prefix to set/reset a single flag without affecting other flags or changing loglevel. When setting both flags and loglevel, a ’+’ separator is expected between the last flags value and before loglevel.
| + | |
| − | | + | |
| − | loglevel is a string or a number containing one of the following values:
| + | |
| − | | + | |
| − | ‘quiet, -8’
| + | |
| − | Show nothing at all; be silent.
| + | |
| − | | + | |
| − | ‘panic, 0’
| + | |
| − | Only show fatal errors which could lead the process to crash, such as an assertion failure. This is not currently used for anything.
| + | |
| − | | + | |
| − | ‘fatal, 8’
| + | |
| − | Only show fatal errors. These are errors after which the process absolutely cannot continue.
| + | |
| − | | + | |
| − | ‘error, 16’
| + | |
| − | Show all errors, including ones which can be recovered from.
| + | |
| − | | + | |
| − | ‘warning, 24’
| + | |
| − | Show all warnings and errors. Any message related to possibly incorrect or unexpected events will be shown.
| + | |
| − | | + | |
| − | ‘info, 32’
| + | |
| − | Show informative messages during processing. This is in addition to warnings and errors. This is the default value.
| + | |
| − | | + | |
| − | ‘verbose, 40’
| + | |
| − | Same as info, except more verbose.
| + | |
| − | | + | |
| − | ‘debug, 48’
| + | |
| − | Show everything, including debugging information.
| + | |
| − | | + | |
| − | ‘trace, 56’
| + | |
| − | For example to enable repeated log output, add the level prefix, and set loglevel to verbose:
| + | |
| − | | + | |
| − | ffmpeg -loglevel repeat+level+verbose -i input output
| + | |
| − | Another example that enables repeated log output without affecting current state of level prefix flag or loglevel:
| + | |
| − | | + | |
| − | ffmpeg [...] -loglevel +repeat
| + | |
| − | By default the program logs to stderr. If coloring is supported by the terminal, colors are used to mark errors and warnings. Log coloring can be disabled setting the environment variable AV_LOG_FORCE_NOCOLOR, or can be forced setting the environment variable AV_LOG_FORCE_COLOR.
| + | |
| − | | + | |
| − | -report
| + | |
| − | Dump full command line and log output to a file named program-YYYYMMDD-HHMMSS.log in the current directory. This file can be useful for bug reports. It also implies -loglevel debug.
| + | |
| − | | + | |
| − | Setting the environment variable FFREPORT to any value has the same effect. If the value is a ’:’-separated key=value sequence, these options will affect the report; option values must be escaped if they contain special characters or the options delimiter ’:’ (see the “Quoting and escaping” section in the ffmpeg-utils manual).
| + | |
| − | | + | |
| − | The following options are recognized:
| + | |
| − | | + | |
| − | file
| + | |
| − | set the file name to use for the report; %p is expanded to the name of the program, %t is expanded to a timestamp, %% is expanded to a plain %
| + | |
| − | | + | |
| − | level
| + | |
| − | set the log verbosity level using a numerical value (see -loglevel).
| + | |
| − | | + | |
| − | For example, to output a report to a file named ffreport.log using a log level of 32 (alias for log level info):
| + | |
| − | | + | |
| − | FFREPORT=file=ffreport.log:level=32 ffmpeg -i input output
| + | |
| − | Errors in parsing the environment variable are not fatal, and will not appear in the report.
| + | |
| − | | + | |
| − | -hide_banner
| + | |
| − | Suppress printing banner.
| + | |
| − | | + | |
| − | All FFmpeg tools will normally show a copyright notice, build options and library versions. This option can be used to suppress printing this information.
| + | |
| − | | + | |
| − | -cpuflags flags (global)
| + | |
| − | Allows setting and clearing cpu flags. This option is intended for testing. Do not use it unless you know what you’re doing.
| + | |
| − | | + | |
| − | ffmpeg -cpuflags -sse+mmx ...
| + | |
| − | ffmpeg -cpuflags mmx ...
| + | |
| − | ffmpeg -cpuflags 0 ...
| + | |
| − | Possible flags for this option are:
| + | |
| − | | + | |
| − | ‘x86’
| + | |
| − | ‘mmx’
| + | |
| − | ‘mmxext’
| + | |
| − | ‘sse’
| + | |
| − | ‘sse2’
| + | |
| − | ‘sse2slow’
| + | |
| − | ‘sse3’
| + | |
| − | ‘sse3slow’
| + | |
| − | ‘ssse3’
| + | |
| − | ‘atom’
| + | |
| − | ‘sse4.1’
| + | |
| − | ‘sse4.2’
| + | |
| − | ‘avx’
| + | |
| − | ‘avx2’
| + | |
| − | ‘xop’
| + | |
| − | ‘fma3’
| + | |
| − | ‘fma4’
| + | |
| − | ‘3dnow’
| + | |
| − | ‘3dnowext’
| + | |
| − | ‘bmi1’
| + | |
| − | ‘bmi2’
| + | |
| − | ‘cmov’
| + | |
| − | ‘ARM’
| + | |
| − | ‘armv5te’
| + | |
| − | ‘armv6’
| + | |
| − | ‘armv6t2’
| + | |
| − | ‘vfp’
| + | |
| − | ‘vfpv3’
| + | |
| − | ‘neon’
| + | |
| − | ‘setend’
| + | |
| − | ‘AArch64’
| + | |
| − | ‘armv8’
| + | |
| − | ‘vfp’
| + | |
| − | ‘neon’
| + | |
| − | ‘PowerPC’
| + | |
| − | ‘altivec’
| + | |
| − | ‘Specific Processors’
| + | |
| − | ‘pentium2’
| + | |
| − | ‘pentium3’
| + | |
| − | ‘pentium4’
| + | |
| − | ‘k6’
| + | |
| − | ‘k62’
| + | |
| − | ‘athlon’
| + | |
| − | ‘athlonxp’
| + | |
| − | ‘k8’
| + | |
| − | 5.3 AVOptions
| + | |
| − | These options are provided directly by the libavformat, libavdevice and libavcodec libraries. To see the list of available AVOptions, use the -help option. They are separated into two categories:
| + | |
| − | | + | |
| − | generic
| + | |
| − | These options can be set for any container, codec or device. Generic options are listed under AVFormatContext options for containers/devices and under AVCodecContext options for codecs.
| + | |
| − | | + | |
| − | private
| + | |
| − | These options are specific to the given container, device or codec. Private options are listed under their corresponding containers/devices/codecs.
| + | |
| − | | + | |
| − | For example to write an ID3v2.3 header instead of a default ID3v2.4 to an MP3 file, use the id3v2_version private option of the MP3 muxer:
| + | |
| − | | + | |
| − | ffmpeg -i input.flac -id3v2_version 3 out.mp3
| + | |
| − | All codec AVOptions are per-stream, and thus a stream specifier should be attached to them:
| + | |
| − | | + | |
| − | ffmpeg -i multichannel.mxf -map 0:v:0 -map 0:a:0 -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:1 2 -c:a:1 aac -b:2 128k out.mp4
| + | |
| − | In the above example, a multichannel audio stream is mapped twice for output. The first instance is encoded with codec ac3 and bitrate 640k. The second instance is downmixed to 2 channels and encoded with codec aac. A bitrate of 128k is specified for it using absolute index of the output stream.
| + | |
| − | | + | |
| − | Note: the -nooption syntax cannot be used for boolean AVOptions, use -option 0/-option 1.
| + | |
| − | | + | |
| − | Note: the old undocumented way of specifying per-stream AVOptions by prepending v/a/s to the options name is now obsolete and will be removed soon.
| + | |
| − | | + | |
| − | 5.4 Main options
| + | |
| − | -f fmt (input/output)
| + | |
| − | Force input or output file format. The format is normally auto detected for input files and guessed from the file extension for output files, so this option is not needed in most cases.
| + | |
| − | | + | |
| − | -i url (input)
| + | |
| − | input file url
| + | |
| − | | + | |
| − | -y (global)
| + | |
| − | Overwrite output files without asking.
| + | |
| − | | + | |
| − | -n (global)
| + | |
| − | Do not overwrite output files, and exit immediately if a specified output file already exists.
| + | |
| − | | + | |
| − | -stream_loop number (input)
| + | |
| − | Set number of times input stream shall be looped. Loop 0 means no loop, loop -1 means infinite loop.
| + | |
| − | | + | |
| − | -c[:stream_specifier] codec (input/output,per-stream)
| + | |
| − | -codec[:stream_specifier] codec (input/output,per-stream)
| + | |
| − | Select an encoder (when used before an output file) or a decoder (when used before an input file) for one or more streams. codec is the name of a decoder/encoder or a special value copy (output only) to indicate that the stream is not to be re-encoded.
| + | |
| − | | + | |
| − | For example
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0 -c:v libx264 -c:a copy OUTPUT
| + | |
| − | encodes all video streams with libx264 and copies all audio streams.
| + | |
| − | | + | |
| − | For each stream, the last matching c option is applied, so
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0 -c copy -c:v:1 libx264 -c:a:137 libvorbis OUTPUT
| + | |
| − | will copy all the streams except the second video, which will be encoded with libx264, and the 138th audio, which will be encoded with libvorbis.
| + | |
| − | | + | |
| − | -t duration (input/output)
| + | |
| − | When used as an input option (before -i), limit the duration of data read from the input file.
| + | |
| − | | + | |
| − | When used as an output option (before an output url), stop writing the output after its duration reaches duration.
| + | |
| − | | + | |
| − | duration must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.
| + | |
| − | | + | |
| − | -to and -t are mutually exclusive and -t has priority.
| + | |
| − | | + | |
| − | -to position (input/output)
| + | |
| − | Stop writing the output or reading the input at position. position must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.
| + | |
| − | | + | |
| − | -to and -t are mutually exclusive and -t has priority.
| + | |
| − | | + | |
| − | -fs limit_size (output)
| + | |
| − | Set the file size limit, expressed in bytes. No further chunk of bytes is written after the limit is exceeded. The size of the output file is slightly more than the requested file size.
| + | |
| − | | + | |
| − | -ss position (input/output)
| + | |
| − | When used as an input option (before -i), seeks in this input file to position. Note that in most formats it is not possible to seek exactly, so ffmpeg will seek to the closest seek point before position. When transcoding and -accurate_seek is enabled (the default), this extra segment between the seek point and position will be decoded and discarded. When doing stream copy or when -noaccurate_seek is used, it will be preserved.
| + | |
| − | | + | |
| − | When used as an output option (before an output url), decodes but discards input until the timestamps reach position.
| + | |
| − | | + | |
| − | position must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.
| + | |
| − | | + | |
| − | -sseof position (input)
| + | |
| − | Like the -ss option but relative to the "end of file". That is negative values are earlier in the file, 0 is at EOF.
| + | |
| − | | + | |
| − | -itsoffset offset (input)
| + | |
| − | Set the input time offset.
| + | |
| − | | + | |
| − | offset must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.
| + | |
| − | | + | |
| − | The offset is added to the timestamps of the input files. Specifying a positive offset means that the corresponding streams are delayed by the time duration specified in offset.
| + | |
| − | | + | |
| − | -itsscale scale (input,per-stream)
| + | |
| − | Rescale input timestamps. scale should be a floating point number.
| + | |
| − | | + | |
| − | -timestamp date (output)
| + | |
| − | Set the recording timestamp in the container.
| + | |
| − | | + | |
| − | date must be a date specification, see (ffmpeg-utils)the Date section in the ffmpeg-utils(1) manual.
| + | |
| − | | + | |
| − | -metadata[:metadata_specifier] key=value (output,per-metadata)
| + | |
| − | Set a metadata key/value pair.
| + | |
| − | | + | |
| − | An optional metadata_specifier may be given to set metadata on streams, chapters or programs. See -map_metadata documentation for details.
| + | |
| − | | + | |
| − | This option overrides metadata set with -map_metadata. It is also possible to delete metadata by using an empty value.
| + | |
| − | | + | |
| − | For example, for setting the title in the output file:
| + | |
| − | | + | |
| − | ffmpeg -i in.avi -metadata title="my title" out.flv
| + | |
| − | To set the language of the first audio stream:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -metadata:s:a:0 language=eng OUTPUT
| + | |
| − | -disposition[:stream_specifier] value (output,per-stream)
| + | |
| − | Sets the disposition for a stream.
| + | |
| − | | + | |
| − | This option overrides the disposition copied from the input stream. It is also possible to delete the disposition by setting it to 0.
| + | |
| − | | + | |
| − | The following dispositions are recognized:
| + | |
| − | | + | |
| − | default
| + | |
| − | dub
| + | |
| − | original
| + | |
| − | comment
| + | |
| − | lyrics
| + | |
| − | karaoke
| + | |
| − | forced
| + | |
| − | hearing_impaired
| + | |
| − | visual_impaired
| + | |
| − | clean_effects
| + | |
| − | attached_pic
| + | |
| − | captions
| + | |
| − | descriptions
| + | |
| − | dependent
| + | |
| − | metadata
| + | |
| − | For example, to make the second audio stream the default stream:
| + | |
| − | | + | |
| − | ffmpeg -i in.mkv -c copy -disposition:a:1 default out.mkv
| + | |
| − | To make the second subtitle stream the default stream and remove the default disposition from the first subtitle stream:
| + | |
| − | | + | |
| − | ffmpeg -i in.mkv -c copy -disposition:s:0 0 -disposition:s:1 default out.mkv
| + | |
| − | To add an embedded cover/thumbnail:
| + | |
| − | | + | |
| − | ffmpeg -i in.mp4 -i IMAGE -map 0 -map 1 -c copy -c:v:1 png -disposition:v:1 attached_pic out.mp4
| + | |
| − | Not all muxers support embedded thumbnails, and those who do, only support a few formats, like JPEG or PNG.
| + | |
| − | | + | |
| − | -program [title=title:][program_num=program_num:]st=stream[:st=stream...] (output)
| + | |
| − | Creates a program with the specified title, program_num and adds the specified stream(s) to it.
| + | |
| − | | + | |
| − | -target type (output)
| + | |
| − | Specify target file type (vcd, svcd, dvd, dv, dv50). type may be prefixed with pal-, ntsc- or film- to use the corresponding standard. All the format options (bitrate, codecs, buffer sizes) are then set automatically. You can just type:
| + | |
| − | | + | |
| − | ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
| + | |
| − | Nevertheless you can specify additional options as long as you know they do not conflict with the standard, as in:
| + | |
| − | | + | |
| − | ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
| + | |
| − | -dn (input/output)
| + | |
| − | As an input option, blocks all data streams of a file from being filtered or being automatically selected or mapped for any output. See -discard option to disable streams individually.
| + | |
| − | | + | |
| − | As an output option, disables data recording i.e. automatic selection or mapping of any data stream. For full manual control see the -map option.
| + | |
| − | | + | |
| − | -dframes number (output)
| + | |
| − | Set the number of data frames to output. This is an obsolete alias for -frames:d, which you should use instead.
| + | |
| − | | + | |
| − | -frames[:stream_specifier] framecount (output,per-stream)
| + | |
| − | Stop writing to the stream after framecount frames.
| + | |
| − | | + | |
| − | -q[:stream_specifier] q (output,per-stream)
| + | |
| − | -qscale[:stream_specifier] q (output,per-stream)
| + | |
| − | Use fixed quality scale (VBR). The meaning of q/qscale is codec-dependent. If qscale is used without a stream_specifier then it applies only to the video stream, this is to maintain compatibility with previous behavior and as specifying the same codec specific value to 2 different codecs that is audio and video generally is not what is intended when no stream_specifier is used.
| + | |
| − | | + | |
| − | -filter[:stream_specifier] filtergraph (output,per-stream)
| + | |
| − | Create the filtergraph specified by filtergraph and use it to filter the stream.
| + | |
| − | | + | |
| − | filtergraph is a description of the filtergraph to apply to the stream, and must have a single input and a single output of the same type of the stream. In the filtergraph, the input is associated to the label in, and the output to the label out. See the ffmpeg-filters manual for more information about the filtergraph syntax.
| + | |
| − | | + | |
| − | See the -filter_complex option if you want to create filtergraphs with multiple inputs and/or outputs.
| + | |
| − | | + | |
| − | -filter_script[:stream_specifier] filename (output,per-stream)
| + | |
| − | This option is similar to -filter, the only difference is that its argument is the name of the file from which a filtergraph description is to be read.
| + | |
| − | | + | |
| − | -filter_threads nb_threads (global)
| + | |
| − | Defines how many threads are used to process a filter pipeline. Each pipeline will produce a thread pool with this many threads available for parallel processing. The default is the number of available CPUs.
| + | |
| − | | + | |
| − | -pre[:stream_specifier] preset_name (output,per-stream)
| + | |
| − | Specify the preset for matching stream(s).
| + | |
| − | | + | |
| − | -stats (global)
| + | |
| − | Print encoding progress/statistics. It is on by default, to explicitly disable it you need to specify -nostats.
| + | |
| − | | + | |
| − | -progress url (global)
| + | |
| − | Send program-friendly progress information to url.
| + | |
| − | | + | |
| − | Progress information is written approximately every second and at the end of the encoding process. It is made of "key=value" lines. key consists of only alphanumeric characters. The last key of a sequence of progress information is always "progress".
| + | |
| − | | + | |
| − | -stdin
| + | |
| − | Enable interaction on standard input. On by default unless standard input is used as an input. To explicitly disable interaction you need to specify -nostdin.
| + | |
| − | | + | |
| − | Disabling interaction on standard input is useful, for example, if ffmpeg is in the background process group. Roughly the same result can be achieved with ffmpeg ... < /dev/null but it requires a shell.
| + | |
| − | | + | |
| − | -debug_ts (global)
| + | |
| − | Print timestamp information. It is off by default. This option is mostly useful for testing and debugging purposes, and the output format may change from one version to another, so it should not be employed by portable scripts.
| + | |
| − | | + | |
| − | See also the option -fdebug ts.
| + | |
| − | | + | |
| − | -attach filename (output)
| + | |
| − | Add an attachment to the output file. This is supported by a few formats like Matroska for e.g. fonts used in rendering subtitles. Attachments are implemented as a specific type of stream, so this option will add a new stream to the file. It is then possible to use per-stream options on this stream in the usual way. Attachment streams created with this option will be created after all the other streams (i.e. those created with -map or automatic mappings).
| + | |
| − | | + | |
| − | Note that for Matroska you also have to set the mimetype metadata tag:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -attach DejaVuSans.ttf -metadata:s:2 mimetype=application/x-truetype-font out.mkv
| + | |
| − | (assuming that the attachment stream will be third in the output file).
| + | |
| − | | + | |
| − | -dump_attachment[:stream_specifier] filename (input,per-stream)
| + | |
| − | Extract the matching attachment stream into a file named filename. If filename is empty, then the value of the filename metadata tag will be used.
| + | |
| − | | + | |
| − | E.g. to extract the first attachment to a file named ’out.ttf’:
| + | |
| − | | + | |
| − | ffmpeg -dump_attachment:t:0 out.ttf -i INPUT
| + | |
| − | To extract all attachments to files determined by the filename tag:
| + | |
| − | | + | |
| − | ffmpeg -dump_attachment:t "" -i INPUT
| + | |
| − | Technical note – attachments are implemented as codec extradata, so this option can actually be used to extract extradata from any stream, not just attachments.
| + | |
| − | | + | |
| − | 5.5 Video Options
| + | |
| − | -vframes number (output)
| + | |
| − | Set the number of video frames to output. This is an obsolete alias for -frames:v, which you should use instead.
| + | |
| − | | + | |
| − | -r[:stream_specifier] fps (input/output,per-stream)
| + | |
| − | Set frame rate (Hz value, fraction or abbreviation).
| + | |
| − | | + | |
| − | As an input option, ignore any timestamps stored in the file and instead generate timestamps assuming constant frame rate fps. This is not the same as the -framerate option used for some input formats like image2 or v4l2 (it used to be the same in older versions of FFmpeg). If in doubt use -framerate instead of the input option -r.
| + | |
| − | | + | |
| − | As an output option, duplicate or drop input frames to achieve constant output frame rate fps.
| + | |
| − | | + | |
| − | -s[:stream_specifier] size (input/output,per-stream)
| + | |
| − | Set frame size.
| + | |
| − | | + | |
| − | As an input option, this is a shortcut for the video_size private option, recognized by some demuxers for which the frame size is either not stored in the file or is configurable – e.g. raw video or video grabbers.
| + | |
| − | | + | |
| − | As an output option, this inserts the scale video filter to the end of the corresponding filtergraph. Please use the scale filter directly to insert it at the beginning or some other place.
| + | |
| − | | + | |
| − | The format is ‘wxh’ (default - same as source).
| + | |
| − | | + | |
| − | -aspect[:stream_specifier] aspect (output,per-stream)
| + | |
| − | Set the video display aspect ratio specified by aspect.
| + | |
| − | | + | |
| − | aspect can be a floating point number string, or a string of the form num:den, where num and den are the numerator and denominator of the aspect ratio. For example "4:3", "16:9", "1.3333", and "1.7777" are valid argument values.
| + | |
| − | | + | |
| − | If used together with -vcodec copy, it will affect the aspect ratio stored at container level, but not the aspect ratio stored in encoded frames, if it exists.
| + | |
| − | | + | |
| − | -vn (input/output)
| + | |
| − | As an input option, blocks all video streams of a file from being filtered or being automatically selected or mapped for any output. See -discard option to disable streams individually.
| + | |
| − | | + | |
| − | As an output option, disables video recording i.e. automatic selection or mapping of any video stream. For full manual control see the -map option.
| + | |
| − | | + | |
| − | -vcodec codec (output)
| + | |
| − | Set the video codec. This is an alias for -codec:v.
| + | |
| − | | + | |
| − | -pass[:stream_specifier] n (output,per-stream)
| + | |
| − | Select the pass number (1 or 2). It is used to do two-pass video encoding. The statistics of the video are recorded in the first pass into a log file (see also the option -passlogfile), and in the second pass that log file is used to generate the video at the exact requested bitrate. On pass 1, you may just deactivate audio and set output to null, examples for Windows and Unix:
| + | |
| − | | + | |
| − | ffmpeg -i foo.mov -c:v libxvid -pass 1 -an -f rawvideo -y NUL
| + | |
| − | ffmpeg -i foo.mov -c:v libxvid -pass 1 -an -f rawvideo -y /dev/null
| + | |
| − | -passlogfile[:stream_specifier] prefix (output,per-stream)
| + | |
| − | Set two-pass log file name prefix to prefix, the default file name prefix is “ffmpeg2pass”. The complete file name will be PREFIX-N.log, where N is a number specific to the output stream
| + | |
| − | | + | |
| − | -vf filtergraph (output)
| + | |
| − | Create the filtergraph specified by filtergraph and use it to filter the stream.
| + | |
| − | | + | |
| − | This is an alias for -filter:v, see the -filter option.
| + | |
| − | | + | |
| − | -autorotate
| + | |
| − | Automatically rotate the video according to file metadata. Enabled by default, use -noautorotate to disable it.
| + | |
| − | | + | |
| − | -autoscale
| + | |
| − | Automatically scale the video according to the resolution of first frame. Enabled by default, use -noautoscale to disable it. When autoscale is disabled, all output frames of filter graph might not be in the same resolution and may be inadequate for some encoder/muxer. Therefore, it is not recommended to disable it unless you really know what you are doing. Disable autoscale at your own risk.
| + | |
| − | | + | |
| − | 5.6 Advanced Video options
| + | |
| − | -pix_fmt[:stream_specifier] format (input/output,per-stream)
| + | |
| − | Set pixel format. Use -pix_fmts to show all the supported pixel formats. If the selected pixel format can not be selected, ffmpeg will print a warning and select the best pixel format supported by the encoder. If pix_fmt is prefixed by a +, ffmpeg will exit with an error if the requested pixel format can not be selected, and automatic conversions inside filtergraphs are disabled. If pix_fmt is a single +, ffmpeg selects the same pixel format as the input (or graph output) and automatic conversions are disabled.
| + | |
| − | | + | |
| − | -sws_flags flags (input/output)
| + | |
| − | Set SwScaler flags.
| + | |
| − | | + | |
| − | -rc_override[:stream_specifier] override (output,per-stream)
| + | |
| − | Rate control override for specific intervals, formatted as "int,int,int" list separated with slashes. Two first values are the beginning and end frame numbers, last one is quantizer to use if positive, or quality factor if negative.
| + | |
| − | | + | |
| − | -ilme
| + | |
| − | Force interlacing support in encoder (MPEG-2 and MPEG-4 only). Use this option if your input file is interlaced and you want to keep the interlaced format for minimum losses. The alternative is to deinterlace the input stream by use of a filter such as yadif or bwdif, but deinterlacing introduces losses.
| + | |
| − | | + | |
| − | -psnr
| + | |
| − | Calculate PSNR of compressed frames.
| + | |
| − | | + | |
| − | -vstats
| + | |
| − | Dump video coding statistics to vstats_HHMMSS.log.
| + | |
| − | | + | |
| − | -vstats_file file
| + | |
| − | Dump video coding statistics to file.
| + | |
| − | | + | |
| − | -vstats_version file
| + | |
| − | Specifies which version of the vstats format to use. Default is 2.
| + | |
| − | | + | |
| − | version = 1 :
| + | |
| − | | + | |
| − | frame= %5d q= %2.1f PSNR= %6.2f f_size= %6d s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s
| + | |
| − | | + | |
| − | version > 1:
| + | |
| − | | + | |
| − | out= %2d st= %2d frame= %5d q= %2.1f PSNR= %6.2f f_size= %6d s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s
| + | |
| − | | + | |
| − | -top[:stream_specifier] n (output,per-stream)
| + | |
| − | top=1/bottom=0/auto=-1 field first
| + | |
| − | | + | |
| − | -dc precision
| + | |
| − | Intra_dc_precision.
| + | |
| − | | + | |
| − | -vtag fourcc/tag (output)
| + | |
| − | Force video tag/fourcc. This is an alias for -tag:v.
| + | |
| − | | + | |
| − | -qphist (global)
| + | |
| − | Show QP histogram
| + | |
| − | | + | |
| − | -vbsf bitstream_filter
| + | |
| − | Deprecated see -bsf
| + | |
| − | | + | |
| − | -force_key_frames[:stream_specifier] time[,time...] (output,per-stream)
| + | |
| − | -force_key_frames[:stream_specifier] expr:expr (output,per-stream)
| + | |
| − | -force_key_frames[:stream_specifier] source (output,per-stream)
| + | |
| − | force_key_frames can take arguments of the following form:
| + | |
| − | | + | |
| − | time[,time...]
| + | |
| − | If the argument consists of timestamps, ffmpeg will round the specified times to the nearest output timestamp as per the encoder time base and force a keyframe at the first frame having timestamp equal or greater than the computed timestamp. Note that if the encoder time base is too coarse, then the keyframes may be forced on frames with timestamps lower than the specified time. The default encoder time base is the inverse of the output framerate but may be set otherwise via -enc_time_base.
| + | |
| − | | + | |
| − | If one of the times is "chapters[delta]", it is expanded into the time of the beginning of all chapters in the file, shifted by delta, expressed as a time in seconds. This option can be useful to ensure that a seek point is present at a chapter mark or any other designated place in the output file.
| + | |
| − | | + | |
| − | For example, to insert a key frame at 5 minutes, plus key frames 0.1 second before the beginning of every chapter:
| + | |
| − | | + | |
| − | -force_key_frames 0:05:00,chapters-0.1
| + | |
| − | expr:expr
| + | |
| − | If the argument is prefixed with expr:, the string expr is interpreted like an expression and is evaluated for each frame. A key frame is forced in case the evaluation is non-zero.
| + | |
| − | | + | |
| − | The expression in expr can contain the following constants:
| + | |
| − | | + | |
| − | n
| + | |
| − | the number of current processed frame, starting from 0
| + | |
| − | | + | |
| − | n_forced
| + | |
| − | the number of forced frames
| + | |
| − | | + | |
| − | prev_forced_n
| + | |
| − | the number of the previous forced frame, it is NAN when no keyframe was forced yet
| + | |
| − | | + | |
| − | prev_forced_t
| + | |
| − | the time of the previous forced frame, it is NAN when no keyframe was forced yet
| + | |
| − | | + | |
| − | t
| + | |
| − | the time of the current processed frame
| + | |
| − | | + | |
| − | For example to force a key frame every 5 seconds, you can specify:
| + | |
| − | | + | |
| − | -force_key_frames expr:gte(t,n_forced*5)
| + | |
| − | To force a key frame 5 seconds after the time of the last forced one, starting from second 13:
| + | |
| − | | + | |
| − | -force_key_frames expr:if(isnan(prev_forced_t),gte(t,13),gte(t,prev_forced_t+5))
| + | |
| − | source
| + | |
| − | If the argument is source, ffmpeg will force a key frame if the current frame being encoded is marked as a key frame in its source.
| + | |
| − | | + | |
| − | Note that forcing too many keyframes is very harmful for the lookahead algorithms of certain encoders: using fixed-GOP options or similar would be more efficient.
| + | |
| − | | + | |
| − | -copyinkf[:stream_specifier] (output,per-stream)
| + | |
| − | When doing stream copy, copy also non-key frames found at the beginning.
| + | |
| − | | + | |
| − | -init_hw_device type[=name][:device[,key=value...]]
| + | |
| − | Initialise a new hardware device of type type called name, using the given device parameters. If no name is specified it will receive a default name of the form "type%d".
| + | |
| − | | + | |
| − | The meaning of device and the following arguments depends on the device type:
| + | |
| − | | + | |
| − | cuda
| + | |
| − | device is the number of the CUDA device.
| + | |
| − | | + | |
| − | dxva2
| + | |
| − | device is the number of the Direct3D 9 display adapter.
| + | |
| − | | + | |
| − | vaapi
| + | |
| − | device is either an X11 display name or a DRM render node. If not specified, it will attempt to open the default X11 display ($DISPLAY) and then the first DRM render node (/dev/dri/renderD128).
| + | |
| − | | + | |
| − | vdpau
| + | |
| − | device is an X11 display name. If not specified, it will attempt to open the default X11 display ($DISPLAY).
| + | |
| − | | + | |
| − | qsv
| + | |
| − | device selects a value in ‘MFX_IMPL_*’. Allowed values are:
| + | |
| − | | + | |
| − | auto
| + | |
| − | sw
| + | |
| − | hw
| + | |
| − | auto_any
| + | |
| − | hw_any
| + | |
| − | hw2
| + | |
| − | hw3
| + | |
| − | hw4
| + | |
| − | If not specified, ‘auto_any’ is used. (Note that it may be easier to achieve the desired result for QSV by creating the platform-appropriate subdevice (‘dxva2’ or ‘vaapi’) and then deriving a QSV device from that.)
| + | |
| − | | + | |
| − | opencl
| + | |
| − | device selects the platform and device as platform_index.device_index.
| + | |
| − | | + | |
| − | The set of devices can also be filtered using the key-value pairs to find only devices matching particular platform or device strings.
| + | |
| − | | + | |
| − | The strings usable as filters are:
| + | |
| − | | + | |
| − | platform_profile
| + | |
| − | platform_version
| + | |
| − | platform_name
| + | |
| − | platform_vendor
| + | |
| − | platform_extensions
| + | |
| − | device_name
| + | |
| − | device_vendor
| + | |
| − | driver_version
| + | |
| − | device_version
| + | |
| − | device_profile
| + | |
| − | device_extensions
| + | |
| − | device_type
| + | |
| − | The indices and filters must together uniquely select a device.
| + | |
| − | | + | |
| − | Examples:
| + | |
| − | | + | |
| − | -init_hw_device opencl:0.1
| + | |
| − | Choose the second device on the first platform.
| + | |
| − | | + | |
| − | -init_hw_device opencl:,device_name=Foo9000
| + | |
| − | Choose the device with a name containing the string Foo9000.
| + | |
| − | | + | |
| − | -init_hw_device opencl:1,device_type=gpu,device_extensions=cl_khr_fp16
| + | |
| − | Choose the GPU device on the second platform supporting the cl_khr_fp16 extension.
| + | |
| − | | + | |
| − | vulkan
| + | |
| − | If device is an integer, it selects the device by its index in a system-dependent list of devices. If device is any other string, it selects the first device with a name containing that string as a substring.
| + | |
| − | | + | |
| − | The following options are recognized:
| + | |
| − | | + | |
| − | debug
| + | |
| − | If set to 1, enables the validation layer, if installed.
| + | |
| − | | + | |
| − | linear_images
| + | |
| − | If set to 1, images allocated by the hwcontext will be linear and locally mappable.
| + | |
| − | | + | |
| − | instance_extensions
| + | |
| − | A plus separated list of additional instance extensions to enable.
| + | |
| − | | + | |
| − | device_extensions
| + | |
| − | A plus separated list of additional device extensions to enable.
| + | |
| − | | + | |
| − | Examples:
| + | |
| − | | + | |
| − | -init_hw_device vulkan:1
| + | |
| − | Choose the second device on the system.
| + | |
| − | | + | |
| − | -init_hw_device vulkan:RADV
| + | |
| − | Choose the first device with a name containing the string RADV.
| + | |
| − | | + | |
| − | -init_hw_device vulkan:0,instance_extensions=VK_KHR_wayland_surface+VK_KHR_xcb_surface
| + | |
| − | Choose the first device and enable the Wayland and XCB instance extensions.
| + | |
| − | | + | |
| − | -init_hw_device type[=name]@source
| + | |
| − | Initialise a new hardware device of type type called name, deriving it from the existing device with the name source.
| + | |
| − | | + | |
| − | -init_hw_device list
| + | |
| − | List all hardware device types supported in this build of ffmpeg.
| + | |
| − | | + | |
| − | -filter_hw_device name
| + | |
| − | Pass the hardware device called name to all filters in any filter graph. This can be used to set the device to upload to with the hwupload filter, or the device to map to with the hwmap filter. Other filters may also make use of this parameter when they require a hardware device. Note that this is typically only required when the input is not already in hardware frames - when it is, filters will derive the device they require from the context of the frames they receive as input.
| + | |
| − | | + | |
| − | This is a global setting, so all filters will receive the same device.
| + | |
| − | | + | |
| − | -hwaccel[:stream_specifier] hwaccel (input,per-stream)
| + | |
| − | Use hardware acceleration to decode the matching stream(s). The allowed values of hwaccel are:
| + | |
| − | | + | |
| − | none
| + | |
| − | Do not use any hardware acceleration (the default).
| + | |
| − | | + | |
| − | auto
| + | |
| − | Automatically select the hardware acceleration method.
| + | |
| − | | + | |
| − | vdpau
| + | |
| − | Use VDPAU (Video Decode and Presentation API for Unix) hardware acceleration.
| + | |
| − | | + | |
| − | dxva2
| + | |
| − | Use DXVA2 (DirectX Video Acceleration) hardware acceleration.
| + | |
| − | | + | |
| − | vaapi
| + | |
| − | Use VAAPI (Video Acceleration API) hardware acceleration.
| + | |
| − | | + | |
| − | qsv
| + | |
| − | Use the Intel QuickSync Video acceleration for video transcoding.
| + | |
| − | | + | |
| − | Unlike most other values, this option does not enable accelerated decoding (that is used automatically whenever a qsv decoder is selected), but accelerated transcoding, without copying the frames into the system memory.
| + | |
| − | | + | |
| − | For it to work, both the decoder and the encoder must support QSV acceleration and no filters must be used.
| + | |
| − | | + | |
| − | This option has no effect if the selected hwaccel is not available or not supported by the chosen decoder.
| + | |
| − | | + | |
| − | Note that most acceleration methods are intended for playback and will not be faster than software decoding on modern CPUs. Additionally, ffmpeg will usually need to copy the decoded frames from the GPU memory into the system memory, resulting in further performance loss. This option is thus mainly useful for testing.
| + | |
| − | | + | |
| − | -hwaccel_device[:stream_specifier] hwaccel_device (input,per-stream)
| + | |
| − | Select a device to use for hardware acceleration.
| + | |
| − | | + | |
| − | This option only makes sense when the -hwaccel option is also specified. It can either refer to an existing device created with -init_hw_device by name, or it can create a new device as if ‘-init_hw_device’ type:hwaccel_device were called immediately before.
| + | |
| − | | + | |
| − | -hwaccels
| + | |
| − | List all hardware acceleration methods supported in this build of ffmpeg.
| + | |
| − | | + | |
| − | 5.7 Audio Options
| + | |
| − | -aframes number (output)
| + | |
| − | Set the number of audio frames to output. This is an obsolete alias for -frames:a, which you should use instead.
| + | |
| − | | + | |
| − | -ar[:stream_specifier] freq (input/output,per-stream)
| + | |
| − | Set the audio sampling frequency. For output streams it is set by default to the frequency of the corresponding input stream. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is mapped to the corresponding demuxer options.
| + | |
| − | | + | |
| − | -aq q (output)
| + | |
| − | Set the audio quality (codec-specific, VBR). This is an alias for -q:a.
| + | |
| − | | + | |
| − | -ac[:stream_specifier] channels (input/output,per-stream)
| + | |
| − | Set the number of audio channels. For output streams it is set by default to the number of input audio channels. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is mapped to the corresponding demuxer options.
| + | |
| − | | + | |
| − | -an (input/output)
| + | |
| − | As an input option, blocks all audio streams of a file from being filtered or being automatically selected or mapped for any output. See -discard option to disable streams individually.
| + | |
| − | | + | |
| − | As an output option, disables audio recording i.e. automatic selection or mapping of any audio stream. For full manual control see the -map option.
| + | |
| − | | + | |
| − | -acodec codec (input/output)
| + | |
| − | Set the audio codec. This is an alias for -codec:a.
| + | |
| − | | + | |
| − | -sample_fmt[:stream_specifier] sample_fmt (output,per-stream)
| + | |
| − | Set the audio sample format. Use -sample_fmts to get a list of supported sample formats.
| + | |
| − | | + | |
| − | -af filtergraph (output)
| + | |
| − | Create the filtergraph specified by filtergraph and use it to filter the stream.
| + | |
| − | | + | |
| − | This is an alias for -filter:a, see the -filter option.
| + | |
| − | | + | |
| − | 5.8 Advanced Audio options
| + | |
| − | -atag fourcc/tag (output)
| + | |
| − | Force audio tag/fourcc. This is an alias for -tag:a.
| + | |
| − | | + | |
| − | -absf bitstream_filter
| + | |
| − | Deprecated, see -bsf
| + | |
| − | | + | |
| − | -guess_layout_max channels (input,per-stream)
| + | |
| − | If some input channel layout is not known, try to guess only if it corresponds to at most the specified number of channels. For example, 2 tells to ffmpeg to recognize 1 channel as mono and 2 channels as stereo but not 6 channels as 5.1. The default is to always try to guess. Use 0 to disable all guessing.
| + | |
| − | | + | |
| − | 5.9 Subtitle options
| + | |
| − | -scodec codec (input/output)
| + | |
| − | Set the subtitle codec. This is an alias for -codec:s.
| + | |
| − | | + | |
| − | -sn (input/output)
| + | |
| − | As an input option, blocks all subtitle streams of a file from being filtered or being automatically selected or mapped for any output. See -discard option to disable streams individually.
| + | |
| − | | + | |
| − | As an output option, disables subtitle recording i.e. automatic selection or mapping of any subtitle stream. For full manual control see the -map option.
| + | |
| − | | + | |
| − | -sbsf bitstream_filter
| + | |
| − | Deprecated, see -bsf
| + | |
| − | | + | |
| − | 5.10 Advanced Subtitle options
| + | |
| − | -fix_sub_duration
| + | |
| − | Fix subtitles durations. For each subtitle, wait for the next packet in the same stream and adjust the duration of the first to avoid overlap. This is necessary with some subtitles codecs, especially DVB subtitles, because the duration in the original packet is only a rough estimate and the end is actually marked by an empty subtitle frame. Failing to use this option when necessary can result in exaggerated durations or muxing failures due to non-monotonic timestamps.
| + | |
| − | | + | |
| − | Note that this option will delay the output of all data until the next subtitle packet is decoded: it may increase memory consumption and latency a lot.
| + | |
| − | | + | |
| − | -canvas_size size
| + | |
| − | Set the size of the canvas used to render subtitles.
| + | |
| − | | + | |
| − | 5.11 Advanced options
| + | |
| − | -map [-]input_file_id[:stream_specifier][?][,sync_file_id[:stream_specifier]] | [linklabel] (output)
| + | |
| − | Designate one or more input streams as a source for the output file. Each input stream is identified by the input file index input_file_id and the input stream index input_stream_id within the input file. Both indices start at 0. If specified, sync_file_id:stream_specifier sets which input stream is used as a presentation sync reference.
| + | |
| − | | + | |
| − | The first -map option on the command line specifies the source for output stream 0, the second -map option specifies the source for output stream 1, etc.
| + | |
| − | | + | |
| − | A - character before the stream identifier creates a "negative" mapping. It disables matching streams from already created mappings.
| + | |
| − | | + | |
| − | A trailing ? after the stream index will allow the map to be optional: if the map matches no streams the map will be ignored instead of failing. Note the map will still fail if an invalid input file index is used; such as if the map refers to a non-existent input.
| + | |
| − | | + | |
| − | An alternative [linklabel] form will map outputs from complex filter graphs (see the -filter_complex option) to the output file. linklabel must correspond to a defined output link label in the graph.
| + | |
| − | | + | |
| − | For example, to map ALL streams from the first input file to output
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0 output
| + | |
| − | For example, if you have two audio streams in the first input file, these streams are identified by "0:0" and "0:1". You can use -map to select which streams to place in an output file. For example:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0:1 out.wav
| + | |
| − | will map the input stream in INPUT identified by "0:1" to the (single) output stream in out.wav.
| + | |
| − | | + | |
| − | For example, to select the stream with index 2 from input file a.mov (specified by the identifier "0:2"), and stream with index 6 from input b.mov (specified by the identifier "1:6"), and copy them to the output file out.mov:
| + | |
| − | | + | |
| − | ffmpeg -i a.mov -i b.mov -c copy -map 0:2 -map 1:6 out.mov
| + | |
| − | To select all video and the third audio stream from an input file:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0:v -map 0:a:2 OUTPUT
| + | |
| − | To map all the streams except the second audio, use negative mappings
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0 -map -0:a:1 OUTPUT
| + | |
| − | To map the video and audio streams from the first input, and using the trailing ?, ignore the audio mapping if no audio streams exist in the first input:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0:v -map 0:a? OUTPUT
| + | |
| − | To pick the English audio stream:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map 0:m:language:eng OUTPUT
| + | |
| − | Note that using this option disables the default mappings for this output file.
| + | |
| − | | + | |
| − | -ignore_unknown
| + | |
| − | Ignore input streams with unknown type instead of failing if copying such streams is attempted.
| + | |
| − | | + | |
| − | -copy_unknown
| + | |
| − | Allow input streams with unknown type to be copied instead of failing if copying such streams is attempted.
| + | |
| − | | + | |
| − | -map_channel [input_file_id.stream_specifier.channel_id|-1][?][:output_file_id.stream_specifier]
| + | |
| − | Map an audio channel from a given input to an output. If output_file_id.stream_specifier is not set, the audio channel will be mapped on all the audio streams.
| + | |
| − | | + | |
| − | Using "-1" instead of input_file_id.stream_specifier.channel_id will map a muted channel.
| + | |
| − | | + | |
| − | A trailing ? will allow the map_channel to be optional: if the map_channel matches no channel the map_channel will be ignored instead of failing.
| + | |
| − | | + | |
| − | For example, assuming INPUT is a stereo audio file, you can switch the two audio channels with the following command:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map_channel 0.0.1 -map_channel 0.0.0 OUTPUT
| + | |
| − | If you want to mute the first channel and keep the second:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map_channel -1 -map_channel 0.0.1 OUTPUT
| + | |
| − | The order of the "-map_channel" option specifies the order of the channels in the output stream. The output channel layout is guessed from the number of channels mapped (mono if one "-map_channel", stereo if two, etc.). Using "-ac" in combination of "-map_channel" makes the channel gain levels to be updated if input and output channel layouts don’t match (for instance two "-map_channel" options and "-ac 6").
| + | |
| − | | + | |
| − | You can also extract each channel of an input to specific outputs; the following command extracts two channels of the INPUT audio stream (file 0, stream 0) to the respective OUTPUT_CH0 and OUTPUT_CH1 outputs:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map_channel 0.0.0 OUTPUT_CH0 -map_channel 0.0.1 OUTPUT_CH1
| + | |
| − | The following example splits the channels of a stereo input into two separate streams, which are put into the same output file:
| + | |
| − | | + | |
| − | ffmpeg -i stereo.wav -map 0:0 -map 0:0 -map_channel 0.0.0:0.0 -map_channel 0.0.1:0.1 -y out.ogg
| + | |
| − | Note that currently each output stream can only contain channels from a single input stream; you can’t for example use "-map_channel" to pick multiple input audio channels contained in different streams (from the same or different files) and merge them into a single output stream. It is therefore not currently possible, for example, to turn two separate mono streams into a single stereo stream. However splitting a stereo stream into two single channel mono streams is possible.
| + | |
| − | | + | |
| − | If you need this feature, a possible workaround is to use the amerge filter. For example, if you need to merge a media (here input.mkv) with 2 mono audio streams into one single stereo channel audio stream (and keep the video stream), you can use the following command:
| + | |
| − | | + | |
| − | ffmpeg -i input.mkv -filter_complex "[0:1] [0:2] amerge" -c:a pcm_s16le -c:v copy output.mkv
| + | |
| − | To map the first two audio channels from the first input, and using the trailing ?, ignore the audio channel mapping if the first input is mono instead of stereo:
| + | |
| − | | + | |
| − | ffmpeg -i INPUT -map_channel 0.0.0 -map_channel 0.0.1? OUTPUT
| + | |
| − | -map_metadata[:metadata_spec_out] infile[:metadata_spec_in] (output,per-metadata)
| + | |
| − | Set metadata information of the next output file from infile. Note that those are file indices (zero-based), not filenames. Optional metadata_spec_in/out parameters specify, which metadata to copy. A metadata specifier can have the following forms:
| + | |
| − | | + | |
| − | g
| + | |
| − | global metadata, i.e. metadata that applies to the whole file
| + | |
| − | | + | |
| − | s[:stream_spec]
| + | |
| − | per-stream metadata. stream_spec is a stream specifier as described in the Stream specifiers chapter. In an input metadata specifier, the first matching stream is copied from. In an output metadata specifier, all matching streams are copied to.
| + | |
| − | | + | |
| − | c:chapter_index
| + | |
| − | per-chapter metadata. chapter_index is the zero-based chapter index.
| + | |
| − | | + | |
| − | p:program_index
| + | |
| − | per-program metadata. program_index is the zero-based program index.
| + | |
| − | | + | |
| − | If metadata specifier is omitted, it defaults to global.
| + | |
| − | | + | |
| − | By default, global metadata is copied from the first input file, per-stream and per-chapter metadata is copied along with streams/chapters. These default mappings are disabled by creating any mapping of the relevant type. A negative file index can be used to create a dummy mapping that just disables automatic copying.
| + | |
| − | | + | |
| − | For example to copy metadata from the first stream of the input file to global metadata of the output file:
| + | |
| − | | + | |
| − | ffmpeg -i in.ogg -map_metadata 0:s:0 out.mp3
| + | |
| − | To do the reverse, i.e. copy global metadata to all audio streams:
| + | |
| − | | + | |
| − | ffmpeg -i in.mkv -map_metadata:s:a 0:g out.mkv
| + | |
| − | Note that simple 0 would work as well in this example, since global metadata is assumed by default.
| + | |
| − | | + | |
| − | -map_chapters input_file_index (output)
| + | |
| − | Copy chapters from input file with index input_file_index to the next output file. If no chapter mapping is specified, then chapters are copied from the first input file with at least one chapter. Use a negative file index to disable any chapter copying.
| + | |
| − | | + | |
| − | -benchmark (global)
| + | |
| − | Show benchmarking information at the end of an encode. Shows real, system and user time used and maximum memory consumption. Maximum memory consumption is not supported on all systems, it will usually display as 0 if not supported.
| + | |
| − | | + | |
| − | -benchmark_all (global)
| + | |
| − | Show benchmarking information during the encode. Shows real, system and user time used in various steps (audio/video encode/decode).
| + | |
| − | | + | |
| − | -timelimit duration (global)
| + | |
| − | Exit after ffmpeg has been running for duration seconds in CPU user time.
| + | |
| − | | + | |
| − | -dump (global)
| + | |
| − | Dump each input packet to stderr.
| + | |
| − | | + | |
| − | -hex (global)
| + | |
| − | When dumping packets, also dump the payload.
| + | |
| − | | + | |
| − | -re (input)
| + | |
| − | Read input at native frame rate. Mainly used to simulate a grab device, or live input stream (e.g. when reading from a file). Should not be used with actual grab devices or live input streams (where it can cause packet loss). By default ffmpeg attempts to read the input(s) as fast as possible. This option will slow down the reading of the input(s) to the native frame rate of the input(s). It is useful for real-time output (e.g. live streaming).
| + | |
| − | | + | |
| − | -vsync parameter
| + | |
| − | Video sync method. For compatibility reasons old values can be specified as numbers. Newly added values will have to be specified as strings always.
| + | |
| − | | + | |
| − | 0, passthrough
| + | |
| − | Each frame is passed with its timestamp from the demuxer to the muxer.
| + | |
| − | | + | |
| − | 1, cfr
| + | |
| − | Frames will be duplicated and dropped to achieve exactly the requested constant frame rate.
| + | |
| − | | + | |
| − | 2, vfr
| + | |
| − | Frames are passed through with their timestamp or dropped so as to prevent 2 frames from having the same timestamp.
| + | |
| − | | + | |
| − | drop
| + | |
| − | As passthrough but destroys all timestamps, making the muxer generate fresh timestamps based on frame-rate.
| + | |
| − | | + | |
| − | -1, auto
| + | |
| − | Chooses between 1 and 2 depending on muxer capabilities. This is the default method.
| + | |
| − | | + | |
| − | Note that the timestamps may be further modified by the muxer, after this. For example, in the case that the format option avoid_negative_ts is enabled.
| + | |
| − | | + | |
| − | With -map you can select from which stream the timestamps should be taken. You can leave either video or audio unchanged and sync the remaining stream(s) to the unchanged one.
| + | |
| − | | + | |
| − | -frame_drop_threshold parameter
| + | |
| − | Frame drop threshold, which specifies how much behind video frames can be before they are dropped. In frame rate units, so 1.0 is one frame. The default is -1.1. One possible usecase is to avoid framedrops in case of noisy timestamps or to increase frame drop precision in case of exact timestamps.
| + | |
| − | | + | |
| − | -async samples_per_second
| + | |
| − | Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps, the parameter is the maximum samples per second by which the audio is changed. -async 1 is a special case where only the start of the audio stream is corrected without any later correction.
| + | |
| − | | + | |
| − | Note that the timestamps may be further modified by the muxer, after this. For example, in the case that the format option avoid_negative_ts is enabled.
| + | |
| − | | + | |
| − | This option has been deprecated. Use the aresample audio filter instead.
| + | |
| − | | + | |
| − | -copyts
| + | |
| − | Do not process input timestamps, but keep their values without trying to sanitize them. In particular, do not remove the initial start time offset value.
| + | |
| − | | + | |
| − | Note that, depending on the vsync option or on specific muxer processing (e.g. in case the format option avoid_negative_ts is enabled) the output timestamps may mismatch with the input timestamps even when this option is selected.
| + | |
| − | | + | |
| − | -start_at_zero
| + | |
| − | When used with copyts, shift input timestamps so they start at zero.
| + | |
| − | | + | |
| − | This means that using e.g. -ss 50 will make output timestamps start at 50 seconds, regardless of what timestamp the input file started at.
| + | |
| − | | + | |
| − | -copytb mode
| + | |
| − | Specify how to set the encoder timebase when stream copying. mode is an integer numeric value, and can assume one of the following values:
| + | |
| − | | + | |
| − | 1
| + | |
| − | Use the demuxer timebase.
| + | |
| − | | + | |
| − | The time base is copied to the output encoder from the corresponding input demuxer. This is sometimes required to avoid non monotonically increasing timestamps when copying video streams with variable frame rate.
| + | |
| − | | + | |
| − | 0
| + | |
| − | Use the decoder timebase.
| + | |
| − | | + | |
| − | The time base is copied to the output encoder from the corresponding input decoder.
| + | |
| − | | + | |
| − | -1
| + | |
| − | Try to make the choice automatically, in order to generate a sane output.
| + | |
| − | | + | |
| − | Default value is -1.
| + | |
| − | | + | |
| − | -enc_time_base[:stream_specifier] timebase (output,per-stream)
| + | |
| − | Set the encoder timebase. timebase is a floating point number, and can assume one of the following values:
| + | |
| − | | + | |
| − | 0
| + | |
| − | Assign a default value according to the media type.
| + | |
| − | | + | |
| − | For video - use 1/framerate, for audio - use 1/samplerate.
| + | |
| − | | + | |
| − | -1
| + | |
| − | Use the input stream timebase when possible.
| + | |
| − | | + | |
| − | If an input stream is not available, the default timebase will be used.
| + | |
| − | | + | |
| − | >0
| + | |
| − | Use the provided number as the timebase.
| + | |
| − | | + | |
| − | This field can be provided as a ratio of two integers (e.g. 1:24, 1:48000) or as a floating point number (e.g. 0.04166, 2.0833e-5)
| + | |
| − | | + | |
| − | Default value is 0.
| + | |
| − | | + | |
| − | -bitexact (input/output)
| + | |
| − | Enable bitexact mode for (de)muxer and (de/en)coder
| + | |
| − | | + | |
| − | -shortest (output)
| + | |
| − | Finish encoding when the shortest input stream ends.
| + | |
| − | | + | |
| − | -dts_delta_threshold
| + | |
| − | Timestamp discontinuity delta threshold.
| + | |
| − | | + | |
| − | -dts_error_threshold seconds
| + | |
| − | Timestamp error delta threshold. This threshold use to discard crazy/damaged timestamps and the default is 30 hours which is arbitrarily picked and quite conservative.
| + | |
| − | | + | |
| − | -muxdelay seconds (output)
| + | |
| − | Set the maximum demux-decode delay.
| + | |
| − | | + | |
| − | -muxpreload seconds (output)
| + | |
| − | Set the initial demux-decode delay.
| + | |
| − | | + | |
| − | -streamid output-stream-index:new-value (output)
| + | |
| − | Assign a new stream-id value to an output stream. This option should be specified prior to the output filename to which it applies. For the situation where multiple output files exist, a streamid may be reassigned to a different value.
| + | |
| − | | + | |
| − | For example, to set the stream 0 PID to 33 and the stream 1 PID to 36 for an output mpegts file:
| + | |
| − | | + | |
| − | ffmpeg -i inurl -streamid 0:33 -streamid 1:36 out.ts
| + | |
| − | -bsf[:stream_specifier] bitstream_filters (output,per-stream)
| + | |
| − | Set bitstream filters for matching streams. bitstream_filters is a comma-separated list of bitstream filters. Use the -bsfs option to get the list of bitstream filters.
| + | |
| − | | + | |
| − | ffmpeg -i h264.mp4 -c:v copy -bsf:v h264_mp4toannexb -an out.h264
| + | |
| − | ffmpeg -i file.mov -an -vn -bsf:s mov2textsub -c:s copy -f rawvideo sub.txt
| + | |
| − | -tag[:stream_specifier] codec_tag (input/output,per-stream)
| + | |
| − | Force a tag/fourcc for matching streams.
| + | |
| − | | + | |
| − | -timecode hh:mm:ssSEPff
| + | |
| − | Specify Timecode for writing. SEP is ’:’ for non drop timecode and ’;’ (or ’.’) for drop.
| + | |
| − | | + | |
| − | ffmpeg -i input.mpg -timecode 01:02:03.04 -r 30000/1001 -s ntsc output.mpg
| + | |
| − | -filter_complex filtergraph (global)
| + | |
| − | Define a complex filtergraph, i.e. one with arbitrary number of inputs and/or outputs. For simple graphs – those with one input and one output of the same type – see the -filter options. filtergraph is a description of the filtergraph, as described in the “Filtergraph syntax” section of the ffmpeg-filters manual.
| + | |
| − | | + | |
| − | Input link labels must refer to input streams using the [file_index:stream_specifier] syntax (i.e. the same as -map uses). If stream_specifier matches multiple streams, the first one will be used. An unlabeled input will be connected to the first unused input stream of the matching type.
| + | |
| − | | + | |
| − | Output link labels are referred to with -map. Unlabeled outputs are added to the first output file.
| + | |
| − | | + | |
| − | Note that with this option it is possible to use only lavfi sources without normal input files.
| + | |
| − | | + | |
| − | For example, to overlay an image over video
| + | |
| − | | + | |
| − | ffmpeg -i video.mkv -i image.png -filter_complex '[0:v][1:v]overlay[out]' -map
| + | |
| − | '[out]' out.mkv
| + | |
| − | Here [0:v] refers to the first video stream in the first input file, which is linked to the first (main) input of the overlay filter. Similarly the first video stream in the second input is linked to the second (overlay) input of overlay.
| + | |
| − | | + | |
| − | Assuming there is only one video stream in each input file, we can omit input labels, so the above is equivalent to
| + | |
| − | | + | |
| − | ffmpeg -i video.mkv -i image.png -filter_complex 'overlay[out]' -map
| + | |
| − | '[out]' out.mkv
| + | |
| − | Furthermore we can omit the output label and the single output from the filter graph will be added to the output file automatically, so we can simply write
| + | |
| − | | + | |
| − | ffmpeg -i video.mkv -i image.png -filter_complex 'overlay' out.mkv
| + | |
| − | To generate 5 seconds of pure red video using lavfi color source:
| + | |
| − | | + | |
| − | ffmpeg -filter_complex 'color=c=red' -t 5 out.mkv
| + | |
| − | -filter_complex_threads nb_threads (global)
| + | |
| − | Defines how many threads are used to process a filter_complex graph. Similar to filter_threads but used for -filter_complex graphs only. The default is the number of available CPUs.
| + | |
| − | | + | |
| − | -lavfi filtergraph (global)
| + | |
| − | Define a complex filtergraph, i.e. one with arbitrary number of inputs and/or outputs. Equivalent to -filter_complex.
| + | |
| − | | + | |
| − | -filter_complex_script filename (global)
| + | |
| − | This option is similar to -filter_complex, the only difference is that its argument is the name of the file from which a complex filtergraph description is to be read.
| + | |
| − | | + | |
| − | -accurate_seek (input)
| + | |
| − | This option enables or disables accurate seeking in input files with the -ss option. It is enabled by default, so seeking is accurate when transcoding. Use -noaccurate_seek to disable it, which may be useful e.g. when copying some streams and transcoding the others.
| + | |
| − | | + | |
| − | -seek_timestamp (input)
| + | |
| − | This option enables or disables seeking by timestamp in input files with the -ss option. It is disabled by default. If enabled, the argument to the -ss option is considered an actual timestamp, and is not offset by the start time of the file. This matters only for files which do not start from timestamp 0, such as transport streams.
| + | |
| − | | + | |
| − | -thread_queue_size size (input)
| + | |
| − | This option sets the maximum number of queued packets when reading from the file or device. With low latency / high rate live streams, packets may be discarded if they are not read in a timely manner; setting this value can force ffmpeg to use a separate input thread and read packets as soon as they arrive. By default ffmpeg only do this if multiple inputs are specified.
| + | |
| − | | + | |
| − | -sdp_file file (global)
| + | |
| − | Print sdp information for an output stream to file. This allows dumping sdp information when at least one output isn’t an rtp stream. (Requires at least one of the output formats to be rtp).
| + | |
| − | | + | |
| − | -discard (input)
| + | |
| − | Allows discarding specific streams or frames from streams. Any input stream can be fully discarded, using value all whereas selective discarding of frames from a stream occurs at the demuxer and is not supported by all demuxers.
| + | |
| − | | + | |
| − | none
| + | |
| − | Discard no frame.
| + | |
| − | | + | |
| − | default
| + | |
| − | Default, which discards no frames.
| + | |
| − | | + | |
| − | noref
| + | |
| − | Discard all non-reference frames.
| + | |
| − | | + | |
| − | bidir
| + | |
| − | Discard all bidirectional frames.
| + | |
| − | | + | |
| − | nokey
| + | |
| − | Discard all frames excepts keyframes.
| + | |
| − | | + | |
| − | all
| + | |
| − | Discard all frames.
| + | |
| − | | + | |
| − | -abort_on flags (global)
| + | |
| − | Stop and abort on various conditions. The following flags are available:
| + | |
| − | | + | |
| − | empty_output
| + | |
| − | No packets were passed to the muxer, the output is empty.
| + | |
| − | | + | |
| − | empty_output_stream
| + | |
| − | No packets were passed to the muxer in some of the output streams.
| + | |
| − | | + | |
| − | -xerror (global)
| + | |
| − | Stop and exit on error
| + | |
| − | | + | |
| − | -max_muxing_queue_size packets (output,per-stream)
| + | |
| − | When transcoding audio and/or video streams, ffmpeg will not begin writing into the output until it has one packet for each such stream. While waiting for that to happen, packets for other streams are buffered. This option sets the size of this buffer, in packets, for the matching output stream.
| + | |
| − | | + | |
| − | The default value of this option should be high enough for most uses, so only touch this option if you are sure that you need it.
| + | |
| − | | + | |
| − | -muxing_queue_data_threshold bytes (output,per-stream)
| + | |
| − | This is a minimum threshold until which the muxing queue size is not taken into account. Defaults to 50 megabytes per stream, and is based on the overall size of packets passed to the muxer.
| + | |
| − | | + | |
| − | -auto_conversion_filters (global)
| + | |
| − | Enable automatically inserting format conversion filters in all filter graphs, including those defined by -vf, -af, -filter_complex and -lavfi. If filter format negotiation requires a conversion, the initialization of the filters will fail. Conversions can still be performed by inserting the relevant conversion filter (scale, aresample) in the graph. On by default, to explicitly disable it you need to specify -noauto_conversion_filters.
| + | |
| − | | + | |
| − | As a special exception, you can use a bitmap subtitle stream as input: it will be converted into a video with the same size as the largest video in the file, or 720x576 if no video is present. Note that this is an experimental and temporary solution. It will be removed once libavfilter has proper support for subtitles.
| + | |
| − | | + | |
| − | For example, to hardcode subtitles on top of a DVB-T recording stored in MPEG-TS format, delaying the subtitles by 1 second:
| + | |
| − | | + | |
| − | ffmpeg -i input.ts -filter_complex \
| + | |
| − | '[#0x2ef] setpts=PTS+1/TB [sub] ; [#0x2d0] [sub] overlay' \
| + | |
| − | -sn -map '#0x2dc' output.mkv
| + | |
| − | (0x2d0, 0x2dc and 0x2ef are the MPEG-TS PIDs of respectively the video, audio and subtitles streams; 0:0, 0:3 and 0:7 would have worked too)
| + | |
| − | | + | |
| − | 5.12 Preset files
| + | |
| − | A preset file contains a sequence of option=value pairs, one for each line, specifying a sequence of options which would be awkward to specify on the command line. Lines starting with the hash (’#’) character are ignored and are used to provide comments. Check the presets directory in the FFmpeg source tree for examples.
| + | |
| − | | + | |
| − | There are two types of preset files: ffpreset and avpreset files.
| + | |
| − | | + | |
| − | 5.12.1 ffpreset files
| + | |
| − | ffpreset files are specified with the vpre, apre, spre, and fpre options. The fpre option takes the filename of the preset instead of a preset name as input and can be used for any kind of codec. For the vpre, apre, and spre options, the options specified in a preset file are applied to the currently selected codec of the same type as the preset option.
| + | |
| − | | + | |
| − | The argument passed to the vpre, apre, and spre preset options identifies the preset file to use according to the following rules:
| + | |
| − | | + | |
| − | First ffmpeg searches for a file named arg.ffpreset in the directories $FFMPEG_DATADIR (if set), and $HOME/.ffmpeg, and in the datadir defined at configuration time (usually PREFIX/share/ffmpeg) or in a ffpresets folder along the executable on win32, in that order. For example, if the argument is libvpx-1080p, it will search for the file libvpx-1080p.ffpreset.
| + | |
| − | | + | |
| − | If no such file is found, then ffmpeg will search for a file named codec_name-arg.ffpreset in the above-mentioned directories, where codec_name is the name of the codec to which the preset file options will be applied. For example, if you select the video codec with -vcodec libvpx and use -vpre 1080p, then it will search for the file libvpx-1080p.ffpreset.
| + | |
| − | | + | |
| − | 5.12.2 avpreset files
| + | |
| − | avpreset files are specified with the pre option. They work similar to ffpreset files, but they only allow encoder- specific options. Therefore, an option=value pair specifying an encoder cannot be used.
| + | |
| − | | + | |
| − | When the pre option is specified, ffmpeg will look for files with the suffix .avpreset in the directories $AVCONV_DATADIR (if set), and $HOME/.avconv, and in the datadir defined at configuration time (usually PREFIX/share/ffmpeg), in that order.
| + | |
| − | | + | |
| − | First ffmpeg searches for a file named codec_name-arg.avpreset in the above-mentioned directories, where codec_name is the name of the codec to which the preset file options will be applied. For example, if you select the video codec with -vcodec libvpx and use -pre 1080p, then it will search for the file libvpx-1080p.avpreset.
| + | |
| − | | + | |
| − | If no such file is found, then ffmpeg will search for a file named arg.avpreset in the same directories.
| + | |
| − | | + | |
| − | 6 Examples
| + | |
| − | 6.1 Video and Audio grabbing
| + | |
| − | If you specify the input format and device then ffmpeg can grab video and audio directly.
| + | |
| − | | + | |
| − | ffmpeg -f oss -i /dev/dsp -f video4linux2 -i /dev/video0 /tmp/out.mpg
| + | |
| − | Or with an ALSA audio source (mono input, card id 1) instead of OSS:
| + | |
| − | | + | |
| − | ffmpeg -f alsa -ac 1 -i hw:1 -f video4linux2 -i /dev/video0 /tmp/out.mpg
| + | |
| − | Note that you must activate the right video source and channel before launching ffmpeg with any TV viewer such as xawtv by Gerd Knorr. You also have to set the audio recording levels correctly with a standard mixer.
| + | |
| − | | + | |
| − | 6.2 X11 grabbing
| + | |
| − | Grab the X11 display with ffmpeg via
| + | |
| − | | + | |
| − | ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0 /tmp/out.mpg
| + | |
| − | 0.0 is display.screen number of your X11 server, same as the DISPLAY environment variable.
| + | |
| − | | + | |
| − | ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0+10,20 /tmp/out.mpg
| + | |
| − | 0.0 is display.screen number of your X11 server, same as the DISPLAY environment variable. 10 is the x-offset and 20 the y-offset for the grabbing.
| + | |
| − | | + | |
| − | 6.3 Video and Audio file format conversion
| + | |
| − | Any supported file format and protocol can serve as input to ffmpeg:
| + | |
| − | | + | |
| − | Examples:
| + | |
| − | | + | |
| − | You can use YUV files as input:
| + | |
| − | ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
| + | |
| − | It will use the files:
| + | |
| − | | + | |
| − | /tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
| + | |
| − | /tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
| + | |
| − | The Y files use twice the resolution of the U and V files. They are raw files, without header. They can be generated by all decent video decoders. You must specify the size of the image with the -s option if ffmpeg cannot guess it.
| + | |
| − | | + | |
| − | You can input from a raw YUV420P file:
| + | |
| − | ffmpeg -i /tmp/test.yuv /tmp/out.avi
| + | |
| − | test.yuv is a file containing raw YUV planar data. Each frame is composed of the Y plane followed by the U and V planes at half vertical and horizontal resolution.
| + | |
| − | | + | |
| − | You can output to a raw YUV420P file:
| + | |
| − | ffmpeg -i mydivx.avi hugefile.yuv
| + | |
| − | You can set several input files and output files:
| + | |
| − | ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
| + | |
| − | Converts the audio file a.wav and the raw YUV video file a.yuv to MPEG file a.mpg.
| + | |
| − | | + | |
| − | You can also do audio and video conversions at the same time:
| + | |
| − | ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
| + | |
| − | Converts a.wav to MPEG audio at 22050 Hz sample rate.
| + | |
| − | | + | |
| − | You can encode to several formats at the same time and define a mapping from input stream to output streams:
| + | |
| − | ffmpeg -i /tmp/a.wav -map 0:a -b:a 64k /tmp/a.mp2 -map 0:a -b:a 128k /tmp/b.mp2
| + | |
| − | Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. ’-map file:index’ specifies which input stream is used for each output stream, in the order of the definition of output streams.
| + | |
| − | | + | |
| − | You can transcode decrypted VOBs:
| + | |
| − | ffmpeg -i snatch_1.vob -f avi -c:v mpeg4 -b:v 800k -g 300 -bf 2 -c:a libmp3lame -b:a 128k snatch.avi
| + | |
| − | This is a typical DVD ripping example; the input is a VOB file, the output an AVI file with MPEG-4 video and MP3 audio. Note that in this command we use B-frames so the MPEG-4 stream is DivX5 compatible, and GOP size is 300 which means one intra frame every 10 seconds for 29.97fps input video. Furthermore, the audio stream is MP3-encoded so you need to enable LAME support by passing --enable-libmp3lame to configure. The mapping is particularly useful for DVD transcoding to get the desired audio language.
| + | |
| − | | + | |
| − | NOTE: To see the supported input formats, use ffmpeg -demuxers.
| + | |
| − | | + | |
| − | You can extract images from a video, or create a video from many images:
| + | |
| − | For extracting images from a video:
| + | |
| − | | + | |
| − | ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
| + | |
| − | This will extract one video frame per second from the video and will output them in files named foo-001.jpeg, foo-002.jpeg, etc. Images will be rescaled to fit the new WxH values.
| + | |
| − | | + | |
| − | If you want to extract just a limited number of frames, you can use the above command in combination with the -frames:v or -t option, or in combination with -ss to start extracting from a certain point in time.
| + | |
| − | | + | |
| − | For creating a video from many images:
| + | |
| − | | + | |
| − | ffmpeg -f image2 -framerate 12 -i foo-%03d.jpeg -s WxH foo.avi
| + | |
| − | The syntax foo-%03d.jpeg specifies to use a decimal number composed of three digits padded with zeroes to express the sequence number. It is the same syntax supported by the C printf function, but only formats accepting a normal integer are suitable.
| + | |
| − | | + | |
| − | When importing an image sequence, -i also supports expanding shell-like wildcard patterns (globbing) internally, by selecting the image2-specific -pattern_type glob option.
| + | |
| − | | + | |
| − | For example, for creating a video from filenames matching the glob pattern foo-*.jpeg:
| + | |
| − | | + | |
| − | ffmpeg -f image2 -pattern_type glob -framerate 12 -i 'foo-*.jpeg' -s WxH foo.avi
| + | |
| − | You can put many streams of the same type in the output:
| + | |
| − | ffmpeg -i test1.avi -i test2.avi -map 1:1 -map 1:0 -map 0:1 -map 0:0 -c copy -y test12.nut
| + | |
| − | The resulting output file test12.nut will contain the first four streams from the input files in reverse order.
| + | |
| − | | + | |
| − | To force CBR video output:
| + | |
| − | ffmpeg -i myfile.avi -b 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v
| + | |
| − | The four options lmin, lmax, mblmin and mblmax use ’lambda’ units, but you may use the QP2LAMBDA constant to easily convert from ’q’ units:
| + | |
| − | ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
| + | |
| − | 7 Syntax
| + | |
| − | This section documents the syntax and formats employed by the FFmpeg libraries and tools.
| + | |
| − | | + | |
| − | 7.1 Quoting and escaping
| + | |
| − | FFmpeg adopts the following quoting and escaping mechanism, unless explicitly specified. The following rules are applied:
| + | |
| − | | + | |
| − | ‘'’ and ‘\’ are special characters (respectively used for quoting and escaping). In addition to them, there might be other special characters depending on the specific syntax where the escaping and quoting are employed.
| + | |
| − | A special character is escaped by prefixing it with a ‘\’.
| + | |
| − | All characters enclosed between ‘''’ are included literally in the parsed string. The quote character ‘'’ itself cannot be quoted, so you may need to close the quote and escape it.
| + | |
| − | Leading and trailing whitespaces, unless escaped or quoted, are removed from the parsed string.
| + | |
| − | Note that you may need to add a second level of escaping when using the command line or a script, which depends on the syntax of the adopted shell language.
| + | |
| − | | + | |
| − | The function av_get_token defined in libavutil/avstring.h can be used to parse a token quoted or escaped according to the rules defined above.
| + | |
| − | | + | |
| − | The tool tools/ffescape in the FFmpeg source tree can be used to automatically quote or escape a string in a script.
| + | |
| − | | + | |
| − | 7.1.1 Examples
| + | |
| − | Escape the string Crime d'Amour containing the ' special character:
| + | |
| − | Crime d\'Amour
| + | |
| − | The string above contains a quote, so the ' needs to be escaped when quoting it:
| + | |
| − | 'Crime d'\''Amour'
| + | |
| − | Include leading or trailing whitespaces using quoting:
| + | |
| − | ' this string starts and ends with whitespaces '
| + | |
| − | Escaping and quoting can be mixed together:
| + | |
| − | ' The string '\'string\'' is a string '
| + | |
| − | To include a literal ‘\’ you can use either escaping or quoting:
| + | |
| − | 'c:\foo' can be written as c:\\foo
| + | |
| − | 7.2 Date
| + | |
| − | The accepted syntax is:
| + | |
| − | | + | |
| − | [(YYYY-MM-DD|YYYYMMDD)[T|t| ]]((HH:MM:SS[.m...]]])|(HHMMSS[.m...]]]))[Z]
| + | |
| − | now
| + | |
| − | If the value is "now" it takes the current time.
| + | |
| − | | + | |
| − | Time is local time unless Z is appended, in which case it is interpreted as UTC. If the year-month-day part is not specified it takes the current year-month-day.
| + | |
| − | | + | |
| − | 7.3 Time duration
| + | |
| − | There are two accepted syntaxes for expressing time duration.
| + | |
| − | | + | |
| − | [-][HH:]MM:SS[.m...]
| + | |
| − | HH expresses the number of hours, MM the number of minutes for a maximum of 2 digits, and SS the number of seconds for a maximum of 2 digits. The m at the end expresses decimal value for SS.
| + | |
| − | | + | |
| − | or
| + | |
| − | | + | |
| − | [-]S+[.m...][s|ms|us]
| + | |
| − | S expresses the number of seconds, with the optional decimal part m. The optional literal suffixes ‘s’, ‘ms’ or ‘us’ indicate to interpret the value as seconds, milliseconds or microseconds, respectively.
| + | |
| − | | + | |
| − | In both expressions, the optional ‘-’ indicates negative duration.
| + | |
| − | | + | |
| − | 7.3.1 Examples
| + | |
| − | The following examples are all valid time duration:
| + | |
| − | | + | |
| − | ‘55’
| + | |
| − | 55 seconds
| + | |
| − | | + | |
| − | ‘0.2’
| + | |
| − | 0.2 seconds
| + | |
| − | | + | |
| − | ‘200ms’
| + | |
| − | 200 milliseconds, that’s 0.2s
| + | |
| − | | + | |
| − | ‘200000us’
| + | |
| − | 200000 microseconds, that’s 0.2s
| + | |
| − | | + | |
| − | ‘12:03:45’
| + | |
| − | 12 hours, 03 minutes and 45 seconds
| + | |
| − | | + | |
| − | ‘23.189’
| + | |
| − | 23.189 seconds
| + | |
| − | | + | |
| − | 7.4 Video size
| + | |
| − | Specify the size of the sourced video, it may be a string of the form widthxheight, or the name of a size abbreviation.
| + | |
| − | | + | |
| − | The following abbreviations are recognized:
| + | |
| − | | + | |
| − | ‘ntsc’
| + | |
| − | 720x480
| + | |
| − | | + | |
| − | ‘pal’
| + | |
| − | 720x576
| + | |
| − | | + | |
| − | ‘qntsc’
| + | |
| − | 352x240
| + | |
| − | | + | |
| − | ‘qpal’
| + | |
| − | 352x288
| + | |
| − | | + | |
| − | ‘sntsc’
| + | |
| − | 640x480
| + | |
| − | | + | |
| − | ‘spal’
| + | |
| − | 768x576
| + | |
| − | | + | |
| − | ‘film’
| + | |
| − | 352x240
| + | |
| − | | + | |
| − | ‘ntsc-film’
| + | |
| − | 352x240
| + | |
| − | | + | |
| − | ‘sqcif’
| + | |
| − | 128x96
| + | |
| − | | + | |
| − | ‘qcif’
| + | |
| − | 176x144
| + | |
| − | | + | |
| − | ‘cif’
| + | |
| − | 352x288
| + | |
| − | | + | |
| − | ‘4cif’
| + | |
| − | 704x576
| + | |
| − | | + | |
| − | ‘16cif’
| + | |
| − | 1408x1152
| + | |
| − | | + | |
| − | ‘qqvga’
| + | |
| − | 160x120
| + | |
| − | | + | |
| − | ‘qvga’
| + | |
| − | 320x240
| + | |
| − | | + | |
| − | ‘vga’
| + | |
| − | 640x480
| + | |
| − | | + | |
| − | ‘svga’
| + | |
| − | 800x600
| + | |
| − | | + | |
| − | ‘xga’
| + | |
| − | 1024x768
| + | |
| − | | + | |
| − | ‘uxga’
| + | |
| − | 1600x1200
| + | |
| − | | + | |
| − | ‘qxga’
| + | |
| − | 2048x1536
| + | |
| − | | + | |
| − | ‘sxga’
| + | |
| − | 1280x1024
| + | |
| − | | + | |
| − | ‘qsxga’
| + | |
| − | 2560x2048
| + | |
| − | | + | |
| − | ‘hsxga’
| + | |
| − | 5120x4096
| + | |
| − | | + | |
| − | ‘wvga’
| + | |
| − | 852x480
| + | |
| − | | + | |
| − | ‘wxga’
| + | |
| − | 1366x768
| + | |
| − | | + | |
| − | ‘wsxga’
| + | |
| − | 1600x1024
| + | |
| − | | + | |
| − | ‘wuxga’
| + | |
| − | 1920x1200
| + | |
| − | | + | |
| − | ‘woxga’
| + | |
| − | 2560x1600
| + | |
| − | | + | |
| − | ‘wqsxga’
| + | |
| − | 3200x2048
| + | |
| − | | + | |
| − | ‘wquxga’
| + | |
| − | 3840x2400
| + | |
| − | | + | |
| − | ‘whsxga’
| + | |
| − | 6400x4096
| + | |
| − | | + | |
| − | ‘whuxga’
| + | |
| − | 7680x4800
| + | |
| − | | + | |
| − | ‘cga’
| + | |
| − | 320x200
| + | |
| − | | + | |
| − | ‘ega’
| + | |
| − | 640x350
| + | |
| − | | + | |
| − | ‘hd480’
| + | |
| − | 852x480
| + | |
| − | | + | |
| − | ‘hd720’
| + | |
| − | 1280x720
| + | |
| − | | + | |
| − | ‘hd1080’
| + | |
| − | 1920x1080
| + | |
| − | | + | |
| − | ‘2k’
| + | |
| − | 2048x1080
| + | |
| − | | + | |
| − | ‘2kflat’
| + | |
| − | 1998x1080
| + | |
| − | | + | |
| − | ‘2kscope’
| + | |
| − | 2048x858
| + | |
| − | | + | |
| − | ‘4k’
| + | |
| − | 4096x2160
| + | |
| − | | + | |
| − | ‘4kflat’
| + | |
| − | 3996x2160
| + | |
| − | | + | |
| − | ‘4kscope’
| + | |
| − | 4096x1716
| + | |
| − | | + | |
| − | ‘nhd’
| + | |
| − | 640x360
| + | |
| − | | + | |
| − | ‘hqvga’
| + | |
| − | 240x160
| + | |
| − | | + | |
| − | ‘wqvga’
| + | |
| − | 400x240
| + | |
| − | | + | |
| − | ‘fwqvga’
| + | |
| − | 432x240
| + | |
| − | | + | |
| − | ‘hvga’
| + | |
| − | 480x320
| + | |
| − | | + | |
| − | ‘qhd’
| + | |
| − | 960x540
| + | |
| − | | + | |
| − | ‘2kdci’
| + | |
| − | 2048x1080
| + | |
| − | | + | |
| − | ‘4kdci’
| + | |
| − | 4096x2160
| + | |
| − | | + | |
| − | ‘uhd2160’
| + | |
| − | 3840x2160
| + | |
| − | | + | |
| − | ‘uhd4320’
| + | |
| − | 7680x4320
| + | |
| − | | + | |
| − | 7.5 Video rate
| + | |
| − | Specify the frame rate of a video, expressed as the number of frames generated per second. It has to be a string in the format frame_rate_num/frame_rate_den, an integer number, a float number or a valid video frame rate abbreviation.
| + | |
| − | | + | |
| − | The following abbreviations are recognized:
| + | |
| − | | + | |
| − | ‘ntsc’
| + | |
| − | 30000/1001
| + | |
| − | | + | |
| − | ‘pal’
| + | |
| − | 25/1
| + | |
| − | | + | |
| − | ‘qntsc’
| + | |
| − | 30000/1001
| + | |
| − | | + | |
| − | ‘qpal’
| + | |
| − | 25/1
| + | |
| − | | + | |
| − | ‘sntsc’
| + | |
| − | 30000/1001
| + | |
| − | | + | |
| − | ‘spal’
| + | |
| − | 25/1
| + | |
| − | | + | |
| − | ‘film’
| + | |
| − | 24/1
| + | |
| − | | + | |
| − | ‘ntsc-film’
| + | |
| − | 24000/1001
| + | |
| − | | + | |
| − | 7.6 Ratio
| + | |
| − | A ratio can be expressed as an expression, or in the form numerator:denominator.
| + | |
| − | | + | |
| − | Note that a ratio with infinite (1/0) or negative value is considered valid, so you should check on the returned value if you want to exclude those values.
| + | |
| − | | + | |
| − | The undefined value can be expressed using the "0:0" string.
| + | |
| − | | + | |
| − | 7.7 Color
| + | |
| − | It can be the name of a color as defined below (case insensitive match) or a [0x|#]RRGGBB[AA] sequence, possibly followed by @ and a string representing the alpha component.
| + | |
| − | | + | |
| − | The alpha component may be a string composed by "0x" followed by an hexadecimal number or a decimal number between 0.0 and 1.0, which represents the opacity value (‘0x00’ or ‘0.0’ means completely transparent, ‘0xff’ or ‘1.0’ completely opaque). If the alpha component is not specified then ‘0xff’ is assumed.
| + | |
| − | | + | |
| − | The string ‘random’ will result in a random color.
| + | |
| − | | + | |
| − | The following names of colors are recognized:
| + | |
| − | | + | |
| − | ‘AliceBlue’
| + | |
| − | 0xF0F8FF
| + | |
| − | | + | |
| − | ‘AntiqueWhite’
| + | |
| − | 0xFAEBD7
| + | |
| − | | + | |
| − | ‘Aqua’
| + | |
| − | 0x00FFFF
| + | |
| − | | + | |
| − | ‘Aquamarine’
| + | |
| − | 0x7FFFD4
| + | |
| − | | + | |
| − | ‘Azure’
| + | |
| − | 0xF0FFFF
| + | |
| − | | + | |
| − | ‘Beige’
| + | |
| − | 0xF5F5DC
| + | |
| − | | + | |
| − | ‘Bisque’
| + | |
| − | 0xFFE4C4
| + | |
| − | | + | |
| − | ‘Black’
| + | |
| − | 0x000000
| + | |
| − | | + | |
| − | ‘BlanchedAlmond’
| + | |
| − | 0xFFEBCD
| + | |
| − | | + | |
| − | ‘Blue’
| + | |
| − | 0x0000FF
| + | |
| − | | + | |
| − | ‘BlueViolet’
| + | |
| − | 0x8A2BE2
| + | |
| − | | + | |
| − | ‘Brown’
| + | |
| − | 0xA52A2A
| + | |
| − | | + | |
| − | ‘BurlyWood’
| + | |
| − | 0xDEB887
| + | |
| − | | + | |
| − | ‘CadetBlue’
| + | |
| − | 0x5F9EA0
| + | |
| − | | + | |
| − | ‘Chartreuse’
| + | |
| − | 0x7FFF00
| + | |
| − | | + | |
| − | ‘Chocolate’
| + | |
| − | 0xD2691E
| + | |
| − | | + | |
| − | ‘Coral’
| + | |
| − | 0xFF7F50
| + | |
| − | | + | |
| − | ‘CornflowerBlue’
| + | |
| − | 0x6495ED
| + | |
| − | | + | |
| − | ‘Cornsilk’
| + | |
| − | 0xFFF8DC
| + | |
| − | | + | |
| − | ‘Crimson’
| + | |
| − | 0xDC143C
| + | |
| − | | + | |
| − | ‘Cyan’
| + | |
| − | 0x00FFFF
| + | |
| − | | + | |
| − | ‘DarkBlue’
| + | |
| − | 0x00008B
| + | |
| − | | + | |
| − | ‘DarkCyan’
| + | |
| − | 0x008B8B
| + | |
| − | | + | |
| − | ‘DarkGoldenRod’
| + | |
| − | 0xB8860B
| + | |
| − | | + | |
| − | ‘DarkGray’
| + | |
| − | 0xA9A9A9
| + | |
| − | | + | |
| − | ‘DarkGreen’
| + | |
| − | 0x006400
| + | |
| − | | + | |
| − | ‘DarkKhaki’
| + | |
| − | 0xBDB76B
| + | |
| − | | + | |
| − | ‘DarkMagenta’
| + | |
| − | 0x8B008B
| + | |
| − | | + | |
| − | ‘DarkOliveGreen’
| + | |
| − | 0x556B2F
| + | |
| − | | + | |
| − | ‘Darkorange’
| + | |
| − | 0xFF8C00
| + | |
| − | | + | |
| − | ‘DarkOrchid’
| + | |
| − | 0x9932CC
| + | |
| − | | + | |
| − | ‘DarkRed’
| + | |
| − | 0x8B0000
| + | |
| − | | + | |
| − | ‘DarkSalmon’
| + | |
| − | 0xE9967A
| + | |
| − | | + | |
| − | ‘DarkSeaGreen’
| + | |
| − | 0x8FBC8F
| + | |
| − | | + | |
| − | ‘DarkSlateBlue’
| + | |
| − | 0x483D8B
| + | |
| − | | + | |
| − | ‘DarkSlateGray’
| + | |
| − | 0x2F4F4F
| + | |
| − | | + | |
| − | ‘DarkTurquoise’
| + | |
| − | 0x00CED1
| + | |
| − | | + | |
| − | ‘DarkViolet’
| + | |
| − | 0x9400D3
| + | |
| − | | + | |
| − | ‘DeepPink’
| + | |
| − | 0xFF1493
| + | |
| − | | + | |
| − | ‘DeepSkyBlue’
| + | |
| − | 0x00BFFF
| + | |
| − | | + | |
| − | ‘DimGray’
| + | |
| − | 0x696969
| + | |
| − | | + | |
| − | ‘DodgerBlue’
| + | |
| − | 0x1E90FF
| + | |
| − | | + | |
| − | ‘FireBrick’
| + | |
| − | 0xB22222
| + | |
| − | | + | |
| − | ‘FloralWhite’
| + | |
| − | 0xFFFAF0
| + | |
| − | | + | |
| − | ‘ForestGreen’
| + | |
| − | 0x228B22
| + | |
| − | | + | |
| − | ‘Fuchsia’
| + | |
| − | 0xFF00FF
| + | |
| − | | + | |
| − | ‘Gainsboro’
| + | |
| − | 0xDCDCDC
| + | |
| − | | + | |
| − | ‘GhostWhite’
| + | |
| − | 0xF8F8FF
| + | |
| − | | + | |
| − | ‘Gold’
| + | |
| − | 0xFFD700
| + | |
| − | | + | |
| − | ‘GoldenRod’
| + | |
| − | 0xDAA520
| + | |
| − | | + | |
| − | ‘Gray’
| + | |
| − | 0x808080
| + | |
| − | | + | |
| − | ‘Green’
| + | |
| − | 0x008000
| + | |
| − | | + | |
| − | ‘GreenYellow’
| + | |
| − | 0xADFF2F
| + | |
| − | | + | |
| − | ‘HoneyDew’
| + | |
| − | 0xF0FFF0
| + | |
| − | | + | |
| − | ‘HotPink’
| + | |
| − | 0xFF69B4
| + | |
| − | | + | |
| − | ‘IndianRed’
| + | |
| − | 0xCD5C5C
| + | |
| − | | + | |
| − | ‘Indigo’
| + | |
| − | 0x4B0082
| + | |
| − | | + | |
| − | ‘Ivory’
| + | |
| − | 0xFFFFF0
| + | |
| − | | + | |
| − | ‘Khaki’
| + | |
| − | 0xF0E68C
| + | |
| − | | + | |
| − | ‘Lavender’
| + | |
| − | 0xE6E6FA
| + | |
| − | | + | |
| − | ‘LavenderBlush’
| + | |
| − | 0xFFF0F5
| + | |
| − | | + | |
| − | ‘LawnGreen’
| + | |
| − | 0x7CFC00
| + | |
| − | | + | |
| − | ‘LemonChiffon’
| + | |
| − | 0xFFFACD
| + | |
| − | | + | |
| − | ‘LightBlue’
| + | |
| − | 0xADD8E6
| + | |
| − | | + | |
| − | ‘LightCoral’
| + | |
| − | 0xF08080
| + | |
| − | | + | |
| − | ‘LightCyan’
| + | |
| − | 0xE0FFFF
| + | |
| − | | + | |
| − | ‘LightGoldenRodYellow’
| + | |
| − | 0xFAFAD2
| + | |
| − | | + | |
| − | ‘LightGreen’
| + | |
| − | 0x90EE90
| + | |
| − | | + | |
| − | ‘LightGrey’
| + | |
| − | 0xD3D3D3
| + | |
| − | | + | |
| − | ‘LightPink’
| + | |
| − | 0xFFB6C1
| + | |
| − | | + | |
| − | ‘LightSalmon’
| + | |
| − | 0xFFA07A
| + | |
| − | | + | |
| − | ‘LightSeaGreen’
| + | |
| − | 0x20B2AA
| + | |
| − | | + | |
| − | ‘LightSkyBlue’
| + | |
| − | 0x87CEFA
| + | |
| − | | + | |
| − | ‘LightSlateGray’
| + | |
| − | 0x778899
| + | |
| − | | + | |
| − | ‘LightSteelBlue’
| + | |
| − | 0xB0C4DE
| + | |
| − | | + | |
| − | ‘LightYellow’
| + | |
| − | 0xFFFFE0
| + | |
| − | | + | |
| − | ‘Lime’
| + | |
| − | 0x00FF00
| + | |
| − | | + | |
| − | ‘LimeGreen’
| + | |
| − | 0x32CD32
| + | |
| − | | + | |
| − | ‘Linen’
| + | |
| − | 0xFAF0E6
| + | |
| − | | + | |
| − | ‘Magenta’
| + | |
| − | 0xFF00FF
| + | |
| − | | + | |
| − | ‘Maroon’
| + | |
| − | 0x800000
| + | |
| − | | + | |
| − | ‘MediumAquaMarine’
| + | |
| − | 0x66CDAA
| + | |
| − | | + | |
| − | ‘MediumBlue’
| + | |
| − | 0x0000CD
| + | |
| − | | + | |
| − | ‘MediumOrchid’
| + | |
| − | 0xBA55D3
| + | |
| − | | + | |
| − | ‘MediumPurple’
| + | |
| − | 0x9370D8
| + | |
| − | | + | |
| − | ‘MediumSeaGreen’
| + | |
| − | 0x3CB371
| + | |
| − | | + | |
| − | ‘MediumSlateBlue’
| + | |
| − | 0x7B68EE
| + | |
| − | | + | |
| − | ‘MediumSpringGreen’
| + | |
| − | 0x00FA9A
| + | |
| − | | + | |
| − | ‘MediumTurquoise’
| + | |
| − | 0x48D1CC
| + | |
| − | | + | |
| − | ‘MediumVioletRed’
| + | |
| − | 0xC71585
| + | |
| − | | + | |
| − | ‘MidnightBlue’
| + | |
| − | 0x191970
| + | |
| − | | + | |
| − | ‘MintCream’
| + | |
| − | 0xF5FFFA
| + | |
| − | | + | |
| − | ‘MistyRose’
| + | |
| − | 0xFFE4E1
| + | |
| − | | + | |
| − | ‘Moccasin’
| + | |
| − | 0xFFE4B5
| + | |
| − | | + | |
| − | ‘NavajoWhite’
| + | |
| − | 0xFFDEAD
| + | |
| − | | + | |
| − | ‘Navy’
| + | |
| − | 0x000080
| + | |
| − | | + | |
| − | ‘OldLace’
| + | |
| − | 0xFDF5E6
| + | |
| − | | + | |
| − | ‘Olive’
| + | |
| − | 0x808000
| + | |
| − | | + | |
| − | ‘OliveDrab’
| + | |
| − | 0x6B8E23
| + | |
| − | | + | |
| − | ‘Orange’
| + | |
| − | 0xFFA500
| + | |
| − | | + | |
| − | ‘OrangeRed’
| + | |
| − | 0xFF4500
| + | |
| − | | + | |
| − | ‘Orchid’
| + | |
| − | 0xDA70D6
| + | |
| − | | + | |
| − | ‘PaleGoldenRod’
| + | |
| − | 0xEEE8AA
| + | |
| − | | + | |
| − | ‘PaleGreen’
| + | |
| − | 0x98FB98
| + | |
| − | | + | |
| − | ‘PaleTurquoise’
| + | |
| − | 0xAFEEEE
| + | |
| − | | + | |
| − | ‘PaleVioletRed’
| + | |
| − | 0xD87093
| + | |
| − | | + | |
| − | ‘PapayaWhip’
| + | |
| − | 0xFFEFD5
| + | |
| − | | + | |
| − | ‘PeachPuff’
| + | |
| − | 0xFFDAB9
| + | |
| − | | + | |
| − | ‘Peru’
| + | |
| − | 0xCD853F
| + | |
| − | | + | |
| − | ‘Pink’
| + | |
| − | 0xFFC0CB
| + | |
| − | | + | |
| − | ‘Plum’
| + | |
| − | 0xDDA0DD
| + | |
| − | | + | |
| − | ‘PowderBlue’
| + | |
| − | 0xB0E0E6
| + | |
| − | | + | |
| − | ‘Purple’
| + | |
| − | 0x800080
| + | |
| − | | + | |
| − | ‘Red’
| + | |
| − | 0xFF0000
| + | |
| − | | + | |
| − | ‘RosyBrown’
| + | |
| − | 0xBC8F8F
| + | |
| − | | + | |
| − | ‘RoyalBlue’
| + | |
| − | 0x4169E1
| + | |
| − | | + | |
| − | ‘SaddleBrown’
| + | |
| − | 0x8B4513
| + | |
| − | | + | |
| − | ‘Salmon’
| + | |
| − | 0xFA8072
| + | |
| − | | + | |
| − | ‘SandyBrown’
| + | |
| − | 0xF4A460
| + | |
| − | | + | |
| − | ‘SeaGreen’
| + | |
| − | 0x2E8B57
| + | |
| − | | + | |
| − | ‘SeaShell’
| + | |
| − | 0xFFF5EE
| + | |
| − | | + | |
| − | ‘Sienna’
| + | |
| − | 0xA0522D
| + | |
| − | | + | |
| − | ‘Silver’
| + | |
| − | 0xC0C0C0
| + | |
| − | | + | |
| − | ‘SkyBlue’
| + | |
| − | 0x87CEEB
| + | |
| − | | + | |
| − | ‘SlateBlue’
| + | |
| − | 0x6A5ACD
| + | |
| − | | + | |
| − | ‘SlateGray’
| + | |
| − | 0x708090
| + | |
| − | | + | |
| − | ‘Snow’
| + | |
| − | 0xFFFAFA
| + | |
| − | | + | |
| − | ‘SpringGreen’
| + | |
| − | 0x00FF7F
| + | |
| − | | + | |
| − | ‘SteelBlue’
| + | |
| − | 0x4682B4
| + | |
| − | | + | |
| − | ‘Tan’
| + | |
| − | 0xD2B48C
| + | |
| − | | + | |
| − | ‘Teal’
| + | |
| − | 0x008080
| + | |
| − | | + | |
| − | ‘Thistle’
| + | |
| − | 0xD8BFD8
| + | |
| − | | + | |
| − | ‘Tomato’
| + | |
| − | 0xFF6347
| + | |
| − | | + | |
| − | ‘Turquoise’
| + | |
| − | 0x40E0D0
| + | |
| − | | + | |
| − | ‘Violet’
| + | |
| − | 0xEE82EE
| + | |
| − | | + | |
| − | ‘Wheat’
| + | |
| − | 0xF5DEB3
| + | |
| − | | + | |
| − | ‘White’
| + | |
| − | 0xFFFFFF
| + | |
| − | | + | |
| − | ‘WhiteSmoke’
| + | |
| − | 0xF5F5F5
| + | |
| − | | + | |
| − | ‘Yellow’
| + | |
| − | 0xFFFF00
| + | |
| − | | + | |
| − | ‘YellowGreen’
| + | |
| − | 0x9ACD32
| + | |
| − | | + | |
| − | 7.8 Channel Layout
| + | |
| − | A channel layout specifies the spatial disposition of the channels in a multi-channel audio stream. To specify a channel layout, FFmpeg makes use of a special syntax.
| + | |
| − | | + | |
| − | Individual channels are identified by an id, as given by the table below:
| + | |
| − | | + | |
| − | ‘FL’
| + | |
| − | front left
| + | |
| − | | + | |
| − | ‘FR’
| + | |
| − | front right
| + | |
| − | | + | |
| − | ‘FC’
| + | |
| − | front center
| + | |
| − | | + | |
| − | ‘LFE’
| + | |
| − | low frequency
| + | |
| − | | + | |
| − | ‘BL’
| + | |
| − | back left
| + | |
| − | | + | |
| − | ‘BR’
| + | |
| − | back right
| + | |
| − | | + | |
| − | ‘FLC’
| + | |
| − | front left-of-center
| + | |
| − | | + | |
| − | ‘FRC’
| + | |
| − | front right-of-center
| + | |
| − | | + | |
| − | ‘BC’
| + | |
| − | back center
| + | |
| − | | + | |
| − | ‘SL’
| + | |
| − | side left
| + | |
| − | | + | |
| − | ‘SR’
| + | |
| − | side right
| + | |
| − | | + | |
| − | ‘TC’
| + | |
| − | top center
| + | |
| − | | + | |
| − | ‘TFL’
| + | |
| − | top front left
| + | |
| − | | + | |
| − | ‘TFC’
| + | |
| − | top front center
| + | |
| − | | + | |
| − | ‘TFR’
| + | |
| − | top front right
| + | |
| − | | + | |
| − | ‘TBL’
| + | |
| − | top back left
| + | |
| − | | + | |
| − | ‘TBC’
| + | |
| − | top back center
| + | |
| − | | + | |
| − | ‘TBR’
| + | |
| − | top back right
| + | |
| − | | + | |
| − | ‘DL’
| + | |
| − | downmix left
| + | |
| − | | + | |
| − | ‘DR’
| + | |
| − | downmix right
| + | |
| − | | + | |
| − | ‘WL’
| + | |
| − | wide left
| + | |
| − | | + | |
| − | ‘WR’
| + | |
| − | wide right
| + | |
| − | | + | |
| − | ‘SDL’
| + | |
| − | surround direct left
| + | |
| − | | + | |
| − | ‘SDR’
| + | |
| − | surround direct right
| + | |
| − | | + | |
| − | ‘LFE2’
| + | |
| − | low frequency 2
| + | |
| − | | + | |
| − | Standard channel layout compositions can be specified by using the following identifiers:
| + | |
| − | | + | |
| − | ‘mono’
| + | |
| − | FC
| + | |
| − | | + | |
| − | ‘stereo’
| + | |
| − | FL+FR
| + | |
| − | | + | |
| − | ‘2.1’
| + | |
| − | FL+FR+LFE
| + | |
| − | | + | |
| − | ‘3.0’
| + | |
| − | FL+FR+FC
| + | |
| − | | + | |
| − | ‘3.0(back)’
| + | |
| − | FL+FR+BC
| + | |
| − | | + | |
| − | ‘4.0’
| + | |
| − | FL+FR+FC+BC
| + | |
| − | | + | |
| − | ‘quad’
| + | |
| − | FL+FR+BL+BR
| + | |
| − | | + | |
| − | ‘quad(side)’
| + | |
| − | FL+FR+SL+SR
| + | |
| − | | + | |
| − | ‘3.1’
| + | |
| − | FL+FR+FC+LFE
| + | |
| − | | + | |
| − | ‘5.0’
| + | |
| − | FL+FR+FC+BL+BR
| + | |
| − | | + | |
| − | ‘5.0(side)’
| + | |
| − | FL+FR+FC+SL+SR
| + | |
| − | | + | |
| − | ‘4.1’
| + | |
| − | FL+FR+FC+LFE+BC
| + | |
| − | | + | |
| − | ‘5.1’
| + | |
| − | FL+FR+FC+LFE+BL+BR
| + | |
| − | | + | |
| − | ‘5.1(side)’
| + | |
| − | FL+FR+FC+LFE+SL+SR
| + | |
| − | | + | |
| − | ‘6.0’
| + | |
| − | FL+FR+FC+BC+SL+SR
| + | |
| − | | + | |
| − | ‘6.0(front)’
| + | |
| − | FL+FR+FLC+FRC+SL+SR
| + | |
| − | | + | |
| − | ‘hexagonal’
| + | |
| − | FL+FR+FC+BL+BR+BC
| + | |
| − | | + | |
| − | ‘6.1’
| + | |
| − | FL+FR+FC+LFE+BC+SL+SR
| + | |
| − | | + | |
| − | ‘6.1’
| + | |
| − | FL+FR+FC+LFE+BL+BR+BC
| + | |
| − | | + | |
| − | ‘6.1(front)’
| + | |
| − | FL+FR+LFE+FLC+FRC+SL+SR
| + | |
| − | | + | |
| − | ‘7.0’
| + | |
| − | FL+FR+FC+BL+BR+SL+SR
| + | |
| − | | + | |
| − | ‘7.0(front)’
| + | |
| − | FL+FR+FC+FLC+FRC+SL+SR
| + | |
| − | | + | |
| − | ‘7.1’
| + | |
| − | FL+FR+FC+LFE+BL+BR+SL+SR
| + | |
| − | | + | |
| − | ‘7.1(wide)’
| + | |
| − | FL+FR+FC+LFE+BL+BR+FLC+FRC
| + | |
| − | | + | |
| − | ‘7.1(wide-side)’
| + | |
| − | FL+FR+FC+LFE+FLC+FRC+SL+SR
| + | |
| − | | + | |
| − | ‘octagonal’
| + | |
| − | FL+FR+FC+BL+BR+BC+SL+SR
| + | |
| − | | + | |
| − | ‘hexadecagonal’
| + | |
| − | FL+FR+FC+BL+BR+BC+SL+SR+WL+WR+TBL+TBR+TBC+TFC+TFL+TFR
| + | |
| − | | + | |
| − | ‘downmix’
| + | |
| − | DL+DR
| + | |
| − | | + | |
| − | A custom channel layout can be specified as a sequence of terms, separated by ’+’ or ’|’. Each term can be:
| + | |
| − | | + | |
| − | the name of a standard channel layout (e.g. ‘mono’, ‘stereo’, ‘4.0’, ‘quad’, ‘5.0’, etc.)
| + | |
| − | the name of a single channel (e.g. ‘FL’, ‘FR’, ‘FC’, ‘LFE’, etc.)
| + | |
| − | a number of channels, in decimal, followed by ’c’, yielding the default channel layout for that number of channels (see the function av_get_default_channel_layout). Note that not all channel counts have a default layout.
| + | |
| − | a number of channels, in decimal, followed by ’C’, yielding an unknown channel layout with the specified number of channels. Note that not all channel layout specification strings support unknown channel layouts.
| + | |
| − | a channel layout mask, in hexadecimal starting with "0x" (see the AV_CH_* macros in libavutil/channel_layout.h.
| + | |
| − | Before libavutil version 53 the trailing character "c" to specify a number of channels was optional, but now it is required, while a channel layout mask can also be specified as a decimal number (if and only if not followed by "c" or "C").
| + | |
| − | | + | |
| − | See also the function av_get_channel_layout defined in libavutil/channel_layout.h.
| + | |
| − | | + | |
| − | 8 Expression Evaluation
| + | |
| − | When evaluating an arithmetic expression, FFmpeg uses an internal formula evaluator, implemented through the libavutil/eval.h interface.
| + | |
| − | | + | |
| − | An expression may contain unary, binary operators, constants, and functions.
| + | |
| − | | + | |
| − | Two expressions expr1 and expr2 can be combined to form another expression "expr1;expr2". expr1 and expr2 are evaluated in turn, and the new expression evaluates to the value of expr2.
| + | |
| − | | + | |
| − | The following binary operators are available: +, -, *, /, ^.
| + | |
| − | | + | |
| − | The following unary operators are available: +, -.
| + | |
| − | | + | |
| − | The following functions are available:
| + | |
| − | | + | |
| − | abs(x)
| + | |
| − | Compute absolute value of x.
| + | |
| − | | + | |
| − | acos(x)
| + | |
| − | Compute arccosine of x.
| + | |
| − | | + | |
| − | asin(x)
| + | |
| − | Compute arcsine of x.
| + | |
| − | | + | |
| − | atan(x)
| + | |
| − | Compute arctangent of x.
| + | |
| − | | + | |
| − | atan2(x, y)
| + | |
| − | Compute principal value of the arc tangent of y/x.
| + | |
| − | | + | |
| − | between(x, min, max)
| + | |
| − | Return 1 if x is greater than or equal to min and lesser than or equal to max, 0 otherwise.
| + | |
| − | | + | |
| − | bitand(x, y)
| + | |
| − | bitor(x, y)
| + | |
| − | Compute bitwise and/or operation on x and y.
| + | |
| − | | + | |
| − | The results of the evaluation of x and y are converted to integers before executing the bitwise operation.
| + | |
| − | | + | |
| − | Note that both the conversion to integer and the conversion back to floating point can lose precision. Beware of unexpected results for large numbers (usually 2^53 and larger).
| + | |
| − | | + | |
| − | ceil(expr)
| + | |
| − | Round the value of expression expr upwards to the nearest integer. For example, "ceil(1.5)" is "2.0".
| + | |
| − | | + | |
| − | clip(x, min, max)
| + | |
| − | Return the value of x clipped between min and max.
| + | |
| − | | + | |
| − | cos(x)
| + | |
| − | Compute cosine of x.
| + | |
| − | | + | |
| − | cosh(x)
| + | |
| − | Compute hyperbolic cosine of x.
| + | |
| − | | + | |
| − | eq(x, y)
| + | |
| − | Return 1 if x and y are equivalent, 0 otherwise.
| + | |
| − | | + | |
| − | exp(x)
| + | |
| − | Compute exponential of x (with base e, the Euler’s number).
| + | |
| − | | + | |
| − | floor(expr)
| + | |
| − | Round the value of expression expr downwards to the nearest integer. For example, "floor(-1.5)" is "-2.0".
| + | |
| − | | + | |
| − | gauss(x)
| + | |
| − | Compute Gauss function of x, corresponding to exp(-x*x/2) / sqrt(2*PI).
| + | |
| − | | + | |
| − | gcd(x, y)
| + | |
| − | Return the greatest common divisor of x and y. If both x and y are 0 or either or both are less than zero then behavior is undefined.
| + | |
| − | | + | |
| − | gt(x, y)
| + | |
| − | Return 1 if x is greater than y, 0 otherwise.
| + | |
| − | | + | |
| − | gte(x, y)
| + | |
| − | Return 1 if x is greater than or equal to y, 0 otherwise.
| + | |
| − | | + | |
| − | hypot(x, y)
| + | |
| − | This function is similar to the C function with the same name; it returns "sqrt(x*x + y*y)", the length of the hypotenuse of a right triangle with sides of length x and y, or the distance of the point (x, y) from the origin.
| + | |
| − | | + | |
| − | if(x, y)
| + | |
| − | Evaluate x, and if the result is non-zero return the result of the evaluation of y, return 0 otherwise.
| + | |
| − | | + | |
| − | if(x, y, z)
| + | |
| − | Evaluate x, and if the result is non-zero return the evaluation result of y, otherwise the evaluation result of z.
| + | |
| − | | + | |
| − | ifnot(x, y)
| + | |
| − | Evaluate x, and if the result is zero return the result of the evaluation of y, return 0 otherwise.
| + | |
| − | | + | |
| − | ifnot(x, y, z)
| + | |
| − | Evaluate x, and if the result is zero return the evaluation result of y, otherwise the evaluation result of z.
| + | |
| − | | + | |
| − | isinf(x)
| + | |
| − | Return 1.0 if x is +/-INFINITY, 0.0 otherwise.
| + | |
| − | | + | |
| − | isnan(x)
| + | |
| − | Return 1.0 if x is NAN, 0.0 otherwise.
| + | |
| − | | + | |
| − | ld(var)
| + | |
| − | Load the value of the internal variable with number var, which was previously stored with st(var, expr). The function returns the loaded value.
| + | |
| − | | + | |
| − | lerp(x, y, z)
| + | |
| − | Return linear interpolation between x and y by amount of z.
| + | |
| − | | + | |
| − | log(x)
| + | |
| − | Compute natural logarithm of x.
| + | |
| − | | + | |
| − | lt(x, y)
| + | |
| − | Return 1 if x is lesser than y, 0 otherwise.
| + | |
| − | | + | |
| − | lte(x, y)
| + | |
| − | Return 1 if x is lesser than or equal to y, 0 otherwise.
| + | |
| − | | + | |
| − | max(x, y)
| + | |
| − | Return the maximum between x and y.
| + | |
| − | | + | |
| − | min(x, y)
| + | |
| − | Return the minimum between x and y.
| + | |
| − | | + | |
| − | mod(x, y)
| + | |
| − | Compute the remainder of division of x by y.
| + | |
| − | | + | |
| − | not(expr)
| + | |
| − | Return 1.0 if expr is zero, 0.0 otherwise.
| + | |
| − | | + | |
| − | pow(x, y)
| + | |
| − | Compute the power of x elevated y, it is equivalent to "(x)^(y)".
| + | |
| − | | + | |
| − | print(t)
| + | |
| − | print(t, l)
| + | |
| − | Print the value of expression t with loglevel l. If l is not specified then a default log level is used. Returns the value of the expression printed.
| + | |
| − | | + | |
| − | Prints t with loglevel l
| + | |
| − | | + | |
| − | random(x)
| + | |
| − | Return a pseudo random value between 0.0 and 1.0. x is the index of the internal variable which will be used to save the seed/state.
| + | |
| − | | + | |
| − | root(expr, max)
| + | |
| − | Find an input value for which the function represented by expr with argument ld(0) is 0 in the interval 0..max.
| + | |
| − | | + | |
| − | The expression in expr must denote a continuous function or the result is undefined.
| + | |
| − | | + | |
| − | ld(0) is used to represent the function input value, which means that the given expression will be evaluated multiple times with various input values that the expression can access through ld(0). When the expression evaluates to 0 then the corresponding input value will be returned.
| + | |
| − | | + | |
| − | round(expr)
| + | |
| − | Round the value of expression expr to the nearest integer. For example, "round(1.5)" is "2.0".
| + | |
| − | | + | |
| − | sgn(x)
| + | |
| − | Compute sign of x.
| + | |
| − | | + | |
| − | sin(x)
| + | |
| − | Compute sine of x.
| + | |
| − | | + | |
| − | sinh(x)
| + | |
| − | Compute hyperbolic sine of x.
| + | |
| − | | + | |
| − | sqrt(expr)
| + | |
| − | Compute the square root of expr. This is equivalent to "(expr)^.5".
| + | |
| − | | + | |
| − | squish(x)
| + | |
| − | Compute expression 1/(1 + exp(4*x)).
| + | |
| − | | + | |
| − | st(var, expr)
| + | |
| − | Store the value of the expression expr in an internal variable. var specifies the number of the variable where to store the value, and it is a value ranging from 0 to 9. The function returns the value stored in the internal variable. Note, Variables are currently not shared between expressions.
| + | |
| − | | + | |
| − | tan(x)
| + | |
| − | Compute tangent of x.
| + | |
| − | | + | |
| − | tanh(x)
| + | |
| − | Compute hyperbolic tangent of x.
| + | |
| − | | + | |
| − | taylor(expr, x)
| + | |
| − | taylor(expr, x, id)
| + | |
| − | Evaluate a Taylor series at x, given an expression representing the ld(id)-th derivative of a function at 0.
| + | |
| − | | + | |
| − | When the series does not converge the result is undefined.
| + | |
| − | | + | |
| − | ld(id) is used to represent the derivative order in expr, which means that the given expression will be evaluated multiple times with various input values that the expression can access through ld(id). If id is not specified then 0 is assumed.
| + | |
| − | | + | |
| − | Note, when you have the derivatives at y instead of 0, taylor(expr, x-y) can be used.
| + | |
| − | | + | |
| − | time(0)
| + | |
| − | Return the current (wallclock) time in seconds.
| + | |
| − | | + | |
| − | trunc(expr)
| + | |
| − | Round the value of expression expr towards zero to the nearest integer. For example, "trunc(-1.5)" is "-1.0".
| + | |
| − | | + | |
| − | while(cond, expr)
| + | |
| − | Evaluate expression expr while the expression cond is non-zero, and returns the value of the last expr evaluation, or NAN if cond was always false.
| + | |
| − | | + | |
| − | The following constants are available:
| + | |
| − | | + | |
| − | PI
| + | |
| − | area of the unit disc, approximately 3.14
| + | |
| − | | + | |
| − | E
| + | |
| − | exp(1) (Euler’s number), approximately 2.718
| + | |
| − | | + | |
| − | PHI
| + | |
| − | golden ratio (1+sqrt(5))/2, approximately 1.618
| + | |
| − | | + | |
| − | Assuming that an expression is considered "true" if it has a non-zero value, note that:
| + | |
| − | | + | |
| − | * works like AND
| + | |
| − | | + | |
| − | + works like OR
| + | |
| − | | + | |
| − | For example the construct:
| + | |
| − | | + | |
| − | if (A AND B) then C
| + | |
| − | is equivalent to:
| + | |
| − | | + | |
| − | if(A*B, C)
| + | |
| − | In your C code, you can extend the list of unary and binary functions, and define recognized constants, so that they are available for your expressions.
| + | |
| − | | + | |
| − | The evaluator also recognizes the International System unit prefixes. If ’i’ is appended after the prefix, binary prefixes are used, which are based on powers of 1024 instead of powers of 1000. The ’B’ postfix multiplies the value by 8, and can be appended after a unit prefix or used alone. This allows using for example ’KB’, ’MiB’, ’G’ and ’B’ as number postfix.
| + | |
| − | | + | |
| − | The list of available International System prefixes follows, with indication of the corresponding powers of 10 and of 2.
| + | |
| − | | + | |
| − | y
| + | |
| − | 10^-24 / 2^-80
| + | |
| − | | + | |
| − | z
| + | |
| − | 10^-21 / 2^-70
| + | |
| − | | + | |
| − | a
| + | |
| − | 10^-18 / 2^-60
| + | |
| − | | + | |
| − | f
| + | |
| − | 10^-15 / 2^-50
| + | |
| − | | + | |
| − | p
| + | |
| − | 10^-12 / 2^-40
| + | |
| − | | + | |
| − | n
| + | |
| − | 10^-9 / 2^-30
| + | |
| − | | + | |
| − | u
| + | |
| − | 10^-6 / 2^-20
| + | |
| − | | + | |
| − | m
| + | |
| − | 10^-3 / 2^-10
| + | |
| − | | + | |
| − | c
| + | |
| − | 10^-2
| + | |
| − | | + | |
| − | d
| + | |
| − | 10^-1
| + | |
| − | | + | |
| − | h
| + | |
| − | 10^2
| + | |
| − | | + | |
| − | k
| + | |
| − | 10^3 / 2^10
| + | |
| − | | + | |
| − | K
| + | |
| − | 10^3 / 2^10
| + | |
| − | | + | |
| − | M
| + | |
| − | 10^6 / 2^20
| + | |
| − | | + | |
| − | G
| + | |
| − | 10^9 / 2^30
| + | |
| − | | + | |
| − | T
| + | |
| − | 10^12 / 2^40
| + | |
| − | | + | |
| − | P
| + | |
| − | 10^15 / 2^40
| + | |
| − | | + | |
| − | E
| + | |
| − | 10^18 / 2^50
| + | |
| − | | + | |
| − | Z
| + | |
| − | 10^21 / 2^60
| + | |
| − | | + | |
| − | Y
| + | |
| − | 10^24 / 2^70
| + | |
| − | | + | |
| − | 9 Codec Options
| + | |
| − | libavcodec provides some generic global options, which can be set on all the encoders and decoders. In addition each codec may support so-called private options, which are specific for a given codec.
| + | |
| − | | + | |
| − | Sometimes, a global option may only affect a specific kind of codec, and may be nonsensical or ignored by another, so you need to be aware of the meaning of the specified options. Also some options are meant only for decoding or encoding.
| + | |
| − | | + | |
| − | Options may be set by specifying -option value in the FFmpeg tools, or by setting the value explicitly in the AVCodecContext options or using the libavutil/opt.h API for programmatic use.
| + | |
| − | | + | |
| − | The list of supported options follow:
| + | |
| − | | + | |
| − | b integer (encoding,audio,video)
| + | |
| − | Set bitrate in bits/s. Default value is 200K.
| + | |
| − | | + | |
| − | ab integer (encoding,audio)
| + | |
| − | Set audio bitrate (in bits/s). Default value is 128K.
| + | |
| − | | + | |
| − | bt integer (encoding,video)
| + | |
| − | Set video bitrate tolerance (in bits/s). In 1-pass mode, bitrate tolerance specifies how far ratecontrol is willing to deviate from the target average bitrate value. This is not related to min/max bitrate. Lowering tolerance too much has an adverse effect on quality.
| + | |
| − | | + | |
| − | flags flags (decoding/encoding,audio,video,subtitles)
| + | |
| − | Set generic flags.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘mv4’
| + | |
| − | Use four motion vector by macroblock (mpeg4).
| + | |
| − | | + | |
| − | ‘qpel’
| + | |
| − | Use 1/4 pel motion compensation.
| + | |
| − | | + | |
| − | ‘loop’
| + | |
| − | Use loop filter.
| + | |
| − | | + | |
| − | ‘qscale’
| + | |
| − | Use fixed qscale.
| + | |
| − | | + | |
| − | ‘pass1’
| + | |
| − | Use internal 2pass ratecontrol in first pass mode.
| + | |
| − | | + | |
| − | ‘pass2’
| + | |
| − | Use internal 2pass ratecontrol in second pass mode.
| + | |
| − | | + | |
| − | ‘gray’
| + | |
| − | Only decode/encode grayscale.
| + | |
| − | | + | |
| − | ‘emu_edge’
| + | |
| − | Do not draw edges.
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | Set error[?] variables during encoding.
| + | |
| − | | + | |
| − | ‘truncated’
| + | |
| − | Input bitstream might be randomly truncated.
| + | |
| − | | + | |
| − | ‘drop_changed’
| + | |
| − | Don’t output frames whose parameters differ from first decoded frame in stream. Error AVERROR_INPUT_CHANGED is returned when a frame is dropped.
| + | |
| − | | + | |
| − | ‘ildct’
| + | |
| − | Use interlaced DCT.
| + | |
| − | | + | |
| − | ‘low_delay’
| + | |
| − | Force low delay.
| + | |
| − | | + | |
| − | ‘global_header’
| + | |
| − | Place global headers in extradata instead of every keyframe.
| + | |
| − | | + | |
| − | ‘bitexact’
| + | |
| − | Only write platform-, build- and time-independent data. (except (I)DCT). This ensures that file and data checksums are reproducible and match between platforms. Its primary use is for regression testing.
| + | |
| − | | + | |
| − | ‘aic’
| + | |
| − | Apply H263 advanced intra coding / mpeg4 ac prediction.
| + | |
| − | | + | |
| − | ‘cbp’
| + | |
| − | Deprecated, use mpegvideo private options instead.
| + | |
| − | | + | |
| − | ‘qprd’
| + | |
| − | Deprecated, use mpegvideo private options instead.
| + | |
| − | | + | |
| − | ‘ilme’
| + | |
| − | Apply interlaced motion estimation.
| + | |
| − | | + | |
| − | ‘cgop’
| + | |
| − | Use closed gop.
| + | |
| − | | + | |
| − | ‘output_corrupt’
| + | |
| − | Output even potentially corrupted frames.
| + | |
| − | | + | |
| − | me_method integer (encoding,video)
| + | |
| − | Set motion estimation method.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | zero motion estimation (fastest)
| + | |
| − | | + | |
| − | ‘full’
| + | |
| − | full motion estimation (slowest)
| + | |
| − | | + | |
| − | ‘epzs’
| + | |
| − | EPZS motion estimation (default)
| + | |
| − | | + | |
| − | ‘esa’
| + | |
| − | esa motion estimation (alias for full)
| + | |
| − | | + | |
| − | ‘tesa’
| + | |
| − | tesa motion estimation
| + | |
| − | | + | |
| − | ‘dia’
| + | |
| − | dia motion estimation (alias for epzs)
| + | |
| − | | + | |
| − | ‘log’
| + | |
| − | log motion estimation
| + | |
| − | | + | |
| − | ‘phods’
| + | |
| − | phods motion estimation
| + | |
| − | | + | |
| − | ‘x1’
| + | |
| − | X1 motion estimation
| + | |
| − | | + | |
| − | ‘hex’
| + | |
| − | hex motion estimation
| + | |
| − | | + | |
| − | ‘umh’
| + | |
| − | umh motion estimation
| + | |
| − | | + | |
| − | ‘iter’
| + | |
| − | iter motion estimation
| + | |
| − | | + | |
| − | extradata_size integer
| + | |
| − | Set extradata size.
| + | |
| − | | + | |
| − | time_base rational number
| + | |
| − | Set codec time base.
| + | |
| − | | + | |
| − | It is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented. For fixed-fps content, timebase should be 1 / frame_rate and timestamp increments should be identically 1.
| + | |
| − | | + | |
| − | g integer (encoding,video)
| + | |
| − | Set the group of picture (GOP) size. Default value is 12.
| + | |
| − | | + | |
| − | ar integer (decoding/encoding,audio)
| + | |
| − | Set audio sampling rate (in Hz).
| + | |
| − | | + | |
| − | ac integer (decoding/encoding,audio)
| + | |
| − | Set number of audio channels.
| + | |
| − | | + | |
| − | cutoff integer (encoding,audio)
| + | |
| − | Set cutoff bandwidth. (Supported only by selected encoders, see their respective documentation sections.)
| + | |
| − | | + | |
| − | frame_size integer (encoding,audio)
| + | |
| − | Set audio frame size.
| + | |
| − | | + | |
| − | Each submitted frame except the last must contain exactly frame_size samples per channel. May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, in that case the frame size is not restricted. It is set by some decoders to indicate constant frame size.
| + | |
| − | | + | |
| − | frame_number integer
| + | |
| − | Set the frame number.
| + | |
| − | | + | |
| − | delay integer
| + | |
| − | qcomp float (encoding,video)
| + | |
| − | Set video quantizer scale compression (VBR). It is used as a constant in the ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0.
| + | |
| − | | + | |
| − | qblur float (encoding,video)
| + | |
| − | Set video quantizer scale blur (VBR).
| + | |
| − | | + | |
| − | qmin integer (encoding,video)
| + | |
| − | Set min video quantizer scale (VBR). Must be included between -1 and 69, default value is 2.
| + | |
| − | | + | |
| − | qmax integer (encoding,video)
| + | |
| − | Set max video quantizer scale (VBR). Must be included between -1 and 1024, default value is 31.
| + | |
| − | | + | |
| − | qdiff integer (encoding,video)
| + | |
| − | Set max difference between the quantizer scale (VBR).
| + | |
| − | | + | |
| − | bf integer (encoding,video)
| + | |
| − | Set max number of B frames between non-B-frames.
| + | |
| − | | + | |
| − | Must be an integer between -1 and 16. 0 means that B-frames are disabled. If a value of -1 is used, it will choose an automatic value depending on the encoder.
| + | |
| − | | + | |
| − | Default value is 0.
| + | |
| − | | + | |
| − | b_qfactor float (encoding,video)
| + | |
| − | Set qp factor between P and B frames.
| + | |
| − | | + | |
| − | rc_strategy integer (encoding,video)
| + | |
| − | Set ratecontrol method.
| + | |
| − | | + | |
| − | b_strategy integer (encoding,video)
| + | |
| − | Set strategy to choose between I/P/B-frames.
| + | |
| − | | + | |
| − | ps integer (encoding,video)
| + | |
| − | Set RTP payload size in bytes.
| + | |
| − | | + | |
| − | mv_bits integer
| + | |
| − | header_bits integer
| + | |
| − | i_tex_bits integer
| + | |
| − | p_tex_bits integer
| + | |
| − | i_count integer
| + | |
| − | p_count integer
| + | |
| − | skip_count integer
| + | |
| − | misc_bits integer
| + | |
| − | frame_bits integer
| + | |
| − | codec_tag integer
| + | |
| − | bug flags (decoding,video)
| + | |
| − | Workaround not auto detected encoder bugs.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘autodetect’
| + | |
| − | ‘old_msmpeg4’
| + | |
| − | some old lavc generated msmpeg4v3 files (no autodetection)
| + | |
| − | | + | |
| − | ‘xvid_ilace’
| + | |
| − | Xvid interlacing bug (autodetected if fourcc==XVIX)
| + | |
| − | | + | |
| − | ‘ump4’
| + | |
| − | (autodetected if fourcc==UMP4)
| + | |
| − | | + | |
| − | ‘no_padding’
| + | |
| − | padding bug (autodetected)
| + | |
| − | | + | |
| − | ‘amv’
| + | |
| − | ‘ac_vlc’
| + | |
| − | illegal vlc bug (autodetected per fourcc)
| + | |
| − | | + | |
| − | ‘qpel_chroma’
| + | |
| − | ‘std_qpel’
| + | |
| − | old standard qpel (autodetected per fourcc/version)
| + | |
| − | | + | |
| − | ‘qpel_chroma2’
| + | |
| − | ‘direct_blocksize’
| + | |
| − | direct-qpel-blocksize bug (autodetected per fourcc/version)
| + | |
| − | | + | |
| − | ‘edge’
| + | |
| − | edge padding bug (autodetected per fourcc/version)
| + | |
| − | | + | |
| − | ‘hpel_chroma’
| + | |
| − | ‘dc_clip’
| + | |
| − | ‘ms’
| + | |
| − | Workaround various bugs in microsoft broken decoders.
| + | |
| − | | + | |
| − | ‘trunc’
| + | |
| − | trancated frames
| + | |
| − | | + | |
| − | lelim integer (encoding,video)
| + | |
| − | Set single coefficient elimination threshold for luminance (negative values also consider DC coefficient).
| + | |
| − | | + | |
| − | celim integer (encoding,video)
| + | |
| − | Set single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)
| + | |
| − | | + | |
| − | strict integer (decoding/encoding,audio,video)
| + | |
| − | Specify how strictly to follow the standards.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘very’
| + | |
| − | strictly conform to an older more strict version of the spec or reference software
| + | |
| − | | + | |
| − | ‘strict’
| + | |
| − | strictly conform to all the things in the spec no matter what consequences
| + | |
| − | | + | |
| − | ‘normal’
| + | |
| − | ‘unofficial’
| + | |
| − | allow unofficial extensions
| + | |
| − | | + | |
| − | ‘experimental’
| + | |
| − | allow non standardized experimental things, experimental (unfinished/work in progress/not well tested) decoders and encoders. Note: experimental decoders can pose a security risk, do not use this for decoding untrusted input.
| + | |
| − | | + | |
| − | b_qoffset float (encoding,video)
| + | |
| − | Set QP offset between P and B frames.
| + | |
| − | | + | |
| − | err_detect flags (decoding,audio,video)
| + | |
| − | Set error detection flags.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘crccheck’
| + | |
| − | verify embedded CRCs
| + | |
| − | | + | |
| − | ‘bitstream’
| + | |
| − | detect bitstream specification deviations
| + | |
| − | | + | |
| − | ‘buffer’
| + | |
| − | detect improper bitstream length
| + | |
| − | | + | |
| − | ‘explode’
| + | |
| − | abort decoding on minor error detection
| + | |
| − | | + | |
| − | ‘ignore_err’
| + | |
| − | ignore decoding errors, and continue decoding. This is useful if you want to analyze the content of a video and thus want everything to be decoded no matter what. This option will not result in a video that is pleasing to watch in case of errors.
| + | |
| − | | + | |
| − | ‘careful’
| + | |
| − | consider things that violate the spec and have not been seen in the wild as errors
| + | |
| − | | + | |
| − | ‘compliant’
| + | |
| − | consider all spec non compliancies as errors
| + | |
| − | | + | |
| − | ‘aggressive’
| + | |
| − | consider things that a sane encoder should not do as an error
| + | |
| − | | + | |
| − | has_b_frames integer
| + | |
| − | block_align integer
| + | |
| − | mpeg_quant integer (encoding,video)
| + | |
| − | Use MPEG quantizers instead of H.263.
| + | |
| − | | + | |
| − | qsquish float (encoding,video)
| + | |
| − | How to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function).
| + | |
| − | | + | |
| − | rc_qmod_amp float (encoding,video)
| + | |
| − | Set experimental quantizer modulation.
| + | |
| − | | + | |
| − | rc_qmod_freq integer (encoding,video)
| + | |
| − | Set experimental quantizer modulation.
| + | |
| − | | + | |
| − | rc_override_count integer
| + | |
| − | rc_eq string (encoding,video)
| + | |
| − | Set rate control equation. When computing the expression, besides the standard functions defined in the section ’Expression Evaluation’, the following functions are available: bits2qp(bits), qp2bits(qp). Also the following constants are available: iTex pTex tex mv fCode iCount mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex avgTex.
| + | |
| − | | + | |
| − | maxrate integer (encoding,audio,video)
| + | |
| − | Set max bitrate tolerance (in bits/s). Requires bufsize to be set.
| + | |
| − | | + | |
| − | minrate integer (encoding,audio,video)
| + | |
| − | Set min bitrate tolerance (in bits/s). Most useful in setting up a CBR encode. It is of little use elsewise.
| + | |
| − | | + | |
| − | bufsize integer (encoding,audio,video)
| + | |
| − | Set ratecontrol buffer size (in bits).
| + | |
| − | | + | |
| − | rc_buf_aggressivity float (encoding,video)
| + | |
| − | Currently useless.
| + | |
| − | | + | |
| − | i_qfactor float (encoding,video)
| + | |
| − | Set QP factor between P and I frames.
| + | |
| − | | + | |
| − | i_qoffset float (encoding,video)
| + | |
| − | Set QP offset between P and I frames.
| + | |
| − | | + | |
| − | rc_init_cplx float (encoding,video)
| + | |
| − | Set initial complexity for 1-pass encoding.
| + | |
| − | | + | |
| − | dct integer (encoding,video)
| + | |
| − | Set DCT algorithm.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘auto’
| + | |
| − | autoselect a good one (default)
| + | |
| − | | + | |
| − | ‘fastint’
| + | |
| − | fast integer
| + | |
| − | | + | |
| − | ‘int’
| + | |
| − | accurate integer
| + | |
| − | | + | |
| − | ‘mmx’
| + | |
| − | ‘altivec’
| + | |
| − | ‘faan’
| + | |
| − | floating point AAN DCT
| + | |
| − | | + | |
| − | lumi_mask float (encoding,video)
| + | |
| − | Compress bright areas stronger than medium ones.
| + | |
| − | | + | |
| − | tcplx_mask float (encoding,video)
| + | |
| − | Set temporal complexity masking.
| + | |
| − | | + | |
| − | scplx_mask float (encoding,video)
| + | |
| − | Set spatial complexity masking.
| + | |
| − | | + | |
| − | p_mask float (encoding,video)
| + | |
| − | Set inter masking.
| + | |
| − | | + | |
| − | dark_mask float (encoding,video)
| + | |
| − | Compress dark areas stronger than medium ones.
| + | |
| − | | + | |
| − | idct integer (decoding/encoding,video)
| + | |
| − | Select IDCT implementation.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘auto’
| + | |
| − | ‘int’
| + | |
| − | ‘simple’
| + | |
| − | ‘simplemmx’
| + | |
| − | ‘simpleauto’
| + | |
| − | Automatically pick a IDCT compatible with the simple one
| + | |
| − | | + | |
| − | ‘arm’
| + | |
| − | ‘altivec’
| + | |
| − | ‘sh4’
| + | |
| − | ‘simplearm’
| + | |
| − | ‘simplearmv5te’
| + | |
| − | ‘simplearmv6’
| + | |
| − | ‘simpleneon’
| + | |
| − | ‘simplealpha’
| + | |
| − | ‘ipp’
| + | |
| − | ‘xvidmmx’
| + | |
| − | ‘faani’
| + | |
| − | floating point AAN IDCT
| + | |
| − | | + | |
| − | slice_count integer
| + | |
| − | ec flags (decoding,video)
| + | |
| − | Set error concealment strategy.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘guess_mvs’
| + | |
| − | iterative motion vector (MV) search (slow)
| + | |
| − | | + | |
| − | ‘deblock’
| + | |
| − | use strong deblock filter for damaged MBs
| + | |
| − | | + | |
| − | ‘favor_inter’
| + | |
| − | favor predicting from the previous frame instead of the current
| + | |
| − | | + | |
| − | bits_per_coded_sample integer
| + | |
| − | pred integer (encoding,video)
| + | |
| − | Set prediction method.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘left’
| + | |
| − | ‘plane’
| + | |
| − | ‘median’
| + | |
| − | aspect rational number (encoding,video)
| + | |
| − | Set sample aspect ratio.
| + | |
| − | | + | |
| − | sar rational number (encoding,video)
| + | |
| − | Set sample aspect ratio. Alias to aspect.
| + | |
| − | | + | |
| − | debug flags (decoding/encoding,audio,video,subtitles)
| + | |
| − | Print specific debug info.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘pict’
| + | |
| − | picture info
| + | |
| − | | + | |
| − | ‘rc’
| + | |
| − | rate control
| + | |
| − | | + | |
| − | ‘bitstream’
| + | |
| − | ‘mb_type’
| + | |
| − | macroblock (MB) type
| + | |
| − | | + | |
| − | ‘qp’
| + | |
| − | per-block quantization parameter (QP)
| + | |
| − | | + | |
| − | ‘dct_coeff’
| + | |
| − | ‘green_metadata’
| + | |
| − | display complexity metadata for the upcoming frame, GoP or for a given duration.
| + | |
| − | | + | |
| − | ‘skip’
| + | |
| − | ‘startcode’
| + | |
| − | ‘er’
| + | |
| − | error recognition
| + | |
| − | | + | |
| − | ‘mmco’
| + | |
| − | memory management control operations (H.264)
| + | |
| − | | + | |
| − | ‘bugs’
| + | |
| − | ‘buffers’
| + | |
| − | picture buffer allocations
| + | |
| − | | + | |
| − | ‘thread_ops’
| + | |
| − | threading operations
| + | |
| − | | + | |
| − | ‘nomc’
| + | |
| − | skip motion compensation
| + | |
| − | | + | |
| − | cmp integer (encoding,video)
| + | |
| − | Set full pel me compare function.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘sad’
| + | |
| − | sum of absolute differences, fast (default)
| + | |
| − | | + | |
| − | ‘sse’
| + | |
| − | sum of squared errors
| + | |
| − | | + | |
| − | ‘satd’
| + | |
| − | sum of absolute Hadamard transformed differences
| + | |
| − | | + | |
| − | ‘dct’
| + | |
| − | sum of absolute DCT transformed differences
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | sum of squared quantization errors (avoid, low quality)
| + | |
| − | | + | |
| − | ‘bit’
| + | |
| − | number of bits needed for the block
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | rate distortion optimal, slow
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | 0
| + | |
| − | | + | |
| − | ‘vsad’
| + | |
| − | sum of absolute vertical differences
| + | |
| − | | + | |
| − | ‘vsse’
| + | |
| − | sum of squared vertical differences
| + | |
| − | | + | |
| − | ‘nsse’
| + | |
| − | noise preserving sum of squared differences
| + | |
| − | | + | |
| − | ‘w53’
| + | |
| − | 5/3 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘w97’
| + | |
| − | 9/7 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘dctmax’
| + | |
| − | ‘chroma’
| + | |
| − | subcmp integer (encoding,video)
| + | |
| − | Set sub pel me compare function.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘sad’
| + | |
| − | sum of absolute differences, fast (default)
| + | |
| − | | + | |
| − | ‘sse’
| + | |
| − | sum of squared errors
| + | |
| − | | + | |
| − | ‘satd’
| + | |
| − | sum of absolute Hadamard transformed differences
| + | |
| − | | + | |
| − | ‘dct’
| + | |
| − | sum of absolute DCT transformed differences
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | sum of squared quantization errors (avoid, low quality)
| + | |
| − | | + | |
| − | ‘bit’
| + | |
| − | number of bits needed for the block
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | rate distortion optimal, slow
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | 0
| + | |
| − | | + | |
| − | ‘vsad’
| + | |
| − | sum of absolute vertical differences
| + | |
| − | | + | |
| − | ‘vsse’
| + | |
| − | sum of squared vertical differences
| + | |
| − | | + | |
| − | ‘nsse’
| + | |
| − | noise preserving sum of squared differences
| + | |
| − | | + | |
| − | ‘w53’
| + | |
| − | 5/3 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘w97’
| + | |
| − | 9/7 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘dctmax’
| + | |
| − | ‘chroma’
| + | |
| − | mbcmp integer (encoding,video)
| + | |
| − | Set macroblock compare function.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘sad’
| + | |
| − | sum of absolute differences, fast (default)
| + | |
| − | | + | |
| − | ‘sse’
| + | |
| − | sum of squared errors
| + | |
| − | | + | |
| − | ‘satd’
| + | |
| − | sum of absolute Hadamard transformed differences
| + | |
| − | | + | |
| − | ‘dct’
| + | |
| − | sum of absolute DCT transformed differences
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | sum of squared quantization errors (avoid, low quality)
| + | |
| − | | + | |
| − | ‘bit’
| + | |
| − | number of bits needed for the block
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | rate distortion optimal, slow
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | 0
| + | |
| − | | + | |
| − | ‘vsad’
| + | |
| − | sum of absolute vertical differences
| + | |
| − | | + | |
| − | ‘vsse’
| + | |
| − | sum of squared vertical differences
| + | |
| − | | + | |
| − | ‘nsse’
| + | |
| − | noise preserving sum of squared differences
| + | |
| − | | + | |
| − | ‘w53’
| + | |
| − | 5/3 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘w97’
| + | |
| − | 9/7 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘dctmax’
| + | |
| − | ‘chroma’
| + | |
| − | ildctcmp integer (encoding,video)
| + | |
| − | Set interlaced dct compare function.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘sad’
| + | |
| − | sum of absolute differences, fast (default)
| + | |
| − | | + | |
| − | ‘sse’
| + | |
| − | sum of squared errors
| + | |
| − | | + | |
| − | ‘satd’
| + | |
| − | sum of absolute Hadamard transformed differences
| + | |
| − | | + | |
| − | ‘dct’
| + | |
| − | sum of absolute DCT transformed differences
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | sum of squared quantization errors (avoid, low quality)
| + | |
| − | | + | |
| − | ‘bit’
| + | |
| − | number of bits needed for the block
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | rate distortion optimal, slow
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | 0
| + | |
| − | | + | |
| − | ‘vsad’
| + | |
| − | sum of absolute vertical differences
| + | |
| − | | + | |
| − | ‘vsse’
| + | |
| − | sum of squared vertical differences
| + | |
| − | | + | |
| − | ‘nsse’
| + | |
| − | noise preserving sum of squared differences
| + | |
| − | | + | |
| − | ‘w53’
| + | |
| − | 5/3 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘w97’
| + | |
| − | 9/7 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘dctmax’
| + | |
| − | ‘chroma’
| + | |
| − | dia_size integer (encoding,video)
| + | |
| − | Set diamond type & size for motion estimation.
| + | |
| − | | + | |
| − | ‘(1024, INT_MAX)’
| + | |
| − | full motion estimation(slowest)
| + | |
| − | | + | |
| − | ‘(768, 1024]’
| + | |
| − | umh motion estimation
| + | |
| − | | + | |
| − | ‘(512, 768]’
| + | |
| − | hex motion estimation
| + | |
| − | | + | |
| − | ‘(256, 512]’
| + | |
| − | l2s diamond motion estimation
| + | |
| − | | + | |
| − | ‘[2,256]’
| + | |
| − | var diamond motion estimation
| + | |
| − | | + | |
| − | ‘(-1, 2)’
| + | |
| − | small diamond motion estimation
| + | |
| − | | + | |
| − | ‘-1’
| + | |
| − | funny diamond motion estimation
| + | |
| − | | + | |
| − | ‘(INT_MIN, -1)’
| + | |
| − | sab diamond motion estimation
| + | |
| − | | + | |
| − | last_pred integer (encoding,video)
| + | |
| − | Set amount of motion predictors from the previous frame.
| + | |
| − | | + | |
| − | preme integer (encoding,video)
| + | |
| − | Set pre motion estimation.
| + | |
| − | | + | |
| − | precmp integer (encoding,video)
| + | |
| − | Set pre motion estimation compare function.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘sad’
| + | |
| − | sum of absolute differences, fast (default)
| + | |
| − | | + | |
| − | ‘sse’
| + | |
| − | sum of squared errors
| + | |
| − | | + | |
| − | ‘satd’
| + | |
| − | sum of absolute Hadamard transformed differences
| + | |
| − | | + | |
| − | ‘dct’
| + | |
| − | sum of absolute DCT transformed differences
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | sum of squared quantization errors (avoid, low quality)
| + | |
| − | | + | |
| − | ‘bit’
| + | |
| − | number of bits needed for the block
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | rate distortion optimal, slow
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | 0
| + | |
| − | | + | |
| − | ‘vsad’
| + | |
| − | sum of absolute vertical differences
| + | |
| − | | + | |
| − | ‘vsse’
| + | |
| − | sum of squared vertical differences
| + | |
| − | | + | |
| − | ‘nsse’
| + | |
| − | noise preserving sum of squared differences
| + | |
| − | | + | |
| − | ‘w53’
| + | |
| − | 5/3 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘w97’
| + | |
| − | 9/7 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘dctmax’
| + | |
| − | ‘chroma’
| + | |
| − | pre_dia_size integer (encoding,video)
| + | |
| − | Set diamond type & size for motion estimation pre-pass.
| + | |
| − | | + | |
| − | subq integer (encoding,video)
| + | |
| − | Set sub pel motion estimation quality.
| + | |
| − | | + | |
| − | dtg_active_format integer
| + | |
| − | me_range integer (encoding,video)
| + | |
| − | Set limit motion vectors range (1023 for DivX player).
| + | |
| − | | + | |
| − | ibias integer (encoding,video)
| + | |
| − | Set intra quant bias.
| + | |
| − | | + | |
| − | pbias integer (encoding,video)
| + | |
| − | Set inter quant bias.
| + | |
| − | | + | |
| − | color_table_id integer
| + | |
| − | global_quality integer (encoding,audio,video)
| + | |
| − | coder integer (encoding,video)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘vlc’
| + | |
| − | variable length coder / huffman coder
| + | |
| − | | + | |
| − | ‘ac’
| + | |
| − | arithmetic coder
| + | |
| − | | + | |
| − | ‘raw’
| + | |
| − | raw (no encoding)
| + | |
| − | | + | |
| − | ‘rle’
| + | |
| − | run-length coder
| + | |
| − | | + | |
| − | ‘deflate’
| + | |
| − | deflate-based coder
| + | |
| − | | + | |
| − | context integer (encoding,video)
| + | |
| − | Set context model.
| + | |
| − | | + | |
| − | slice_flags integer
| + | |
| − | mbd integer (encoding,video)
| + | |
| − | Set macroblock decision algorithm (high quality mode).
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘simple’
| + | |
| − | use mbcmp (default)
| + | |
| − | | + | |
| − | ‘bits’
| + | |
| − | use fewest bits
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | use best rate distortion
| + | |
| − | | + | |
| − | stream_codec_tag integer
| + | |
| − | sc_threshold integer (encoding,video)
| + | |
| − | Set scene change threshold.
| + | |
| − | | + | |
| − | lmin integer (encoding,video)
| + | |
| − | Set min lagrange factor (VBR).
| + | |
| − | | + | |
| − | lmax integer (encoding,video)
| + | |
| − | Set max lagrange factor (VBR).
| + | |
| − | | + | |
| − | nr integer (encoding,video)
| + | |
| − | Set noise reduction.
| + | |
| − | | + | |
| − | rc_init_occupancy integer (encoding,video)
| + | |
| − | Set number of bits which should be loaded into the rc buffer before decoding starts.
| + | |
| − | | + | |
| − | flags2 flags (decoding/encoding,audio,video,subtitles)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘fast’
| + | |
| − | Allow non spec compliant speedup tricks.
| + | |
| − | | + | |
| − | ‘noout’
| + | |
| − | Skip bitstream encoding.
| + | |
| − | | + | |
| − | ‘ignorecrop’
| + | |
| − | Ignore cropping information from sps.
| + | |
| − | | + | |
| − | ‘local_header’
| + | |
| − | Place global headers at every keyframe instead of in extradata.
| + | |
| − | | + | |
| − | ‘chunks’
| + | |
| − | Frame data might be split into multiple chunks.
| + | |
| − | | + | |
| − | ‘showall’
| + | |
| − | Show all frames before the first keyframe.
| + | |
| − | | + | |
| − | ‘export_mvs’
| + | |
| − | Export motion vectors into frame side-data (see AV_FRAME_DATA_MOTION_VECTORS) for codecs that support it. See also doc/examples/export_mvs.c.
| + | |
| − | | + | |
| − | ‘skip_manual’
| + | |
| − | Do not skip samples and export skip information as frame side data.
| + | |
| − | | + | |
| − | ‘ass_ro_flush_noop’
| + | |
| − | Do not reset ASS ReadOrder field on flush.
| + | |
| − | | + | |
| − | export_side_data flags (decoding/encoding,audio,video,subtitles)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘mvs’
| + | |
| − | Export motion vectors into frame side-data (see AV_FRAME_DATA_MOTION_VECTORS) for codecs that support it. See also doc/examples/export_mvs.c.
| + | |
| − | | + | |
| − | ‘prft’
| + | |
| − | Export encoder Producer Reference Time into packet side-data (see AV_PKT_DATA_PRFT) for codecs that support it.
| + | |
| − | | + | |
| − | error integer (encoding,video)
| + | |
| − | qns integer (encoding,video)
| + | |
| − | Deprecated, use mpegvideo private options instead.
| + | |
| − | | + | |
| − | threads integer (decoding/encoding,video)
| + | |
| − | Set the number of threads to be used, in case the selected codec implementation supports multi-threading.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘auto, 0’
| + | |
| − | automatically select the number of threads to set
| + | |
| − | | + | |
| − | Default value is ‘auto’.
| + | |
| − | | + | |
| − | me_threshold integer (encoding,video)
| + | |
| − | Set motion estimation threshold.
| + | |
| − | | + | |
| − | mb_threshold integer (encoding,video)
| + | |
| − | Set macroblock threshold.
| + | |
| − | | + | |
| − | dc integer (encoding,video)
| + | |
| − | Set intra_dc_precision.
| + | |
| − | | + | |
| − | nssew integer (encoding,video)
| + | |
| − | Set nsse weight.
| + | |
| − | | + | |
| − | skip_top integer (decoding,video)
| + | |
| − | Set number of macroblock rows at the top which are skipped.
| + | |
| − | | + | |
| − | skip_bottom integer (decoding,video)
| + | |
| − | Set number of macroblock rows at the bottom which are skipped.
| + | |
| − | | + | |
| − | profile integer (encoding,audio,video)
| + | |
| − | Set encoder codec profile. Default value is ‘unknown’. Encoder specific profiles are documented in the relevant encoder documentation.
| + | |
| − | | + | |
| − | level integer (encoding,audio,video)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘unknown’
| + | |
| − | lowres integer (decoding,audio,video)
| + | |
| − | Decode at 1= 1/2, 2=1/4, 3=1/8 resolutions.
| + | |
| − | | + | |
| − | skip_threshold integer (encoding,video)
| + | |
| − | Set frame skip threshold.
| + | |
| − | | + | |
| − | skip_factor integer (encoding,video)
| + | |
| − | Set frame skip factor.
| + | |
| − | | + | |
| − | skip_exp integer (encoding,video)
| + | |
| − | Set frame skip exponent. Negative values behave identical to the corresponding positive ones, except that the score is normalized. Positive values exist primarily for compatibility reasons and are not so useful.
| + | |
| − | | + | |
| − | skipcmp integer (encoding,video)
| + | |
| − | Set frame skip compare function.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘sad’
| + | |
| − | sum of absolute differences, fast (default)
| + | |
| − | | + | |
| − | ‘sse’
| + | |
| − | sum of squared errors
| + | |
| − | | + | |
| − | ‘satd’
| + | |
| − | sum of absolute Hadamard transformed differences
| + | |
| − | | + | |
| − | ‘dct’
| + | |
| − | sum of absolute DCT transformed differences
| + | |
| − | | + | |
| − | ‘psnr’
| + | |
| − | sum of squared quantization errors (avoid, low quality)
| + | |
| − | | + | |
| − | ‘bit’
| + | |
| − | number of bits needed for the block
| + | |
| − | | + | |
| − | ‘rd’
| + | |
| − | rate distortion optimal, slow
| + | |
| − | | + | |
| − | ‘zero’
| + | |
| − | 0
| + | |
| − | | + | |
| − | ‘vsad’
| + | |
| − | sum of absolute vertical differences
| + | |
| − | | + | |
| − | ‘vsse’
| + | |
| − | sum of squared vertical differences
| + | |
| − | | + | |
| − | ‘nsse’
| + | |
| − | noise preserving sum of squared differences
| + | |
| − | | + | |
| − | ‘w53’
| + | |
| − | 5/3 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘w97’
| + | |
| − | 9/7 wavelet, only used in snow
| + | |
| − | | + | |
| − | ‘dctmax’
| + | |
| − | ‘chroma’
| + | |
| − | border_mask float (encoding,video)
| + | |
| − | Increase the quantizer for macroblocks close to borders.
| + | |
| − | | + | |
| − | mblmin integer (encoding,video)
| + | |
| − | Set min macroblock lagrange factor (VBR).
| + | |
| − | | + | |
| − | mblmax integer (encoding,video)
| + | |
| − | Set max macroblock lagrange factor (VBR).
| + | |
| − | | + | |
| − | mepc integer (encoding,video)
| + | |
| − | Set motion estimation bitrate penalty compensation (1.0 = 256).
| + | |
| − | | + | |
| − | skip_loop_filter integer (decoding,video)
| + | |
| − | skip_idct integer (decoding,video)
| + | |
| − | skip_frame integer (decoding,video)
| + | |
| − | Make decoder discard processing depending on the frame type selected by the option value.
| + | |
| − | | + | |
| − | skip_loop_filter skips frame loop filtering, skip_idct skips frame IDCT/dequantization, skip_frame skips decoding.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘none’
| + | |
| − | Discard no frame.
| + | |
| − | | + | |
| − | ‘default’
| + | |
| − | Discard useless frames like 0-sized frames.
| + | |
| − | | + | |
| − | ‘noref’
| + | |
| − | Discard all non-reference frames.
| + | |
| − | | + | |
| − | ‘bidir’
| + | |
| − | Discard all bidirectional frames.
| + | |
| − | | + | |
| − | ‘nokey’
| + | |
| − | Discard all frames excepts keyframes.
| + | |
| − | | + | |
| − | ‘nointra’
| + | |
| − | Discard all frames except I frames.
| + | |
| − | | + | |
| − | ‘all’
| + | |
| − | Discard all frames.
| + | |
| − | | + | |
| − | Default value is ‘default’.
| + | |
| − | | + | |
| − | bidir_refine integer (encoding,video)
| + | |
| − | Refine the two motion vectors used in bidirectional macroblocks.
| + | |
| − | | + | |
| − | brd_scale integer (encoding,video)
| + | |
| − | Downscale frames for dynamic B-frame decision.
| + | |
| − | | + | |
| − | keyint_min integer (encoding,video)
| + | |
| − | Set minimum interval between IDR-frames.
| + | |
| − | | + | |
| − | refs integer (encoding,video)
| + | |
| − | Set reference frames to consider for motion compensation.
| + | |
| − | | + | |
| − | chromaoffset integer (encoding,video)
| + | |
| − | Set chroma qp offset from luma.
| + | |
| − | | + | |
| − | trellis integer (encoding,audio,video)
| + | |
| − | Set rate-distortion optimal quantization.
| + | |
| − | | + | |
| − | mv0_threshold integer (encoding,video)
| + | |
| − | b_sensitivity integer (encoding,video)
| + | |
| − | Adjust sensitivity of b_frame_strategy 1.
| + | |
| − | | + | |
| − | compression_level integer (encoding,audio,video)
| + | |
| − | min_prediction_order integer (encoding,audio)
| + | |
| − | max_prediction_order integer (encoding,audio)
| + | |
| − | timecode_frame_start integer (encoding,video)
| + | |
| − | Set GOP timecode frame start number, in non drop frame format.
| + | |
| − | | + | |
| − | request_channels integer (decoding,audio)
| + | |
| − | Set desired number of audio channels.
| + | |
| − | | + | |
| − | bits_per_raw_sample integer
| + | |
| − | channel_layout integer (decoding/encoding,audio)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | request_channel_layout integer (decoding,audio)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | rc_max_vbv_use float (encoding,video)
| + | |
| − | rc_min_vbv_use float (encoding,video)
| + | |
| − | ticks_per_frame integer (decoding/encoding,audio,video)
| + | |
| − | color_primaries integer (decoding/encoding,video)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘bt709’
| + | |
| − | BT.709
| + | |
| − | | + | |
| − | ‘bt470m’
| + | |
| − | BT.470 M
| + | |
| − | | + | |
| − | ‘bt470bg’
| + | |
| − | BT.470 BG
| + | |
| − | | + | |
| − | ‘smpte170m’
| + | |
| − | SMPTE 170 M
| + | |
| − | | + | |
| − | ‘smpte240m’
| + | |
| − | SMPTE 240 M
| + | |
| − | | + | |
| − | ‘film’
| + | |
| − | Film
| + | |
| − | | + | |
| − | ‘bt2020’
| + | |
| − | BT.2020
| + | |
| − | | + | |
| − | ‘smpte428’
| + | |
| − | ‘smpte428_1’
| + | |
| − | SMPTE ST 428-1
| + | |
| − | | + | |
| − | ‘smpte431’
| + | |
| − | SMPTE 431-2
| + | |
| − | | + | |
| − | ‘smpte432’
| + | |
| − | SMPTE 432-1
| + | |
| − | | + | |
| − | ‘jedec-p22’
| + | |
| − | JEDEC P22
| + | |
| − | | + | |
| − | color_trc integer (decoding/encoding,video)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘bt709’
| + | |
| − | BT.709
| + | |
| − | | + | |
| − | ‘gamma22’
| + | |
| − | BT.470 M
| + | |
| − | | + | |
| − | ‘gamma28’
| + | |
| − | BT.470 BG
| + | |
| − | | + | |
| − | ‘smpte170m’
| + | |
| − | SMPTE 170 M
| + | |
| − | | + | |
| − | ‘smpte240m’
| + | |
| − | SMPTE 240 M
| + | |
| − | | + | |
| − | ‘linear’
| + | |
| − | Linear
| + | |
| − | | + | |
| − | ‘log’
| + | |
| − | ‘log100’
| + | |
| − | Log
| + | |
| − | | + | |
| − | ‘log_sqrt’
| + | |
| − | ‘log316’
| + | |
| − | Log square root
| + | |
| − | | + | |
| − | ‘iec61966_2_4’
| + | |
| − | ‘iec61966-2-4’
| + | |
| − | IEC 61966-2-4
| + | |
| − | | + | |
| − | ‘bt1361’
| + | |
| − | ‘bt1361e’
| + | |
| − | BT.1361
| + | |
| − | | + | |
| − | ‘iec61966_2_1’
| + | |
| − | ‘iec61966-2-1’
| + | |
| − | IEC 61966-2-1
| + | |
| − | | + | |
| − | ‘bt2020_10’
| + | |
| − | ‘bt2020_10bit’
| + | |
| − | BT.2020 - 10 bit
| + | |
| − | | + | |
| − | ‘bt2020_12’
| + | |
| − | ‘bt2020_12bit’
| + | |
| − | BT.2020 - 12 bit
| + | |
| − | | + | |
| − | ‘smpte2084’
| + | |
| − | SMPTE ST 2084
| + | |
| − | | + | |
| − | ‘smpte428’
| + | |
| − | ‘smpte428_1’
| + | |
| − | SMPTE ST 428-1
| + | |
| − | | + | |
| − | ‘arib-std-b67’
| + | |
| − | ARIB STD-B67
| + | |
| − | | + | |
| − | colorspace integer (decoding/encoding,video)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘rgb’
| + | |
| − | RGB
| + | |
| − | | + | |
| − | ‘bt709’
| + | |
| − | BT.709
| + | |
| − | | + | |
| − | ‘fcc’
| + | |
| − | FCC
| + | |
| − | | + | |
| − | ‘bt470bg’
| + | |
| − | BT.470 BG
| + | |
| − | | + | |
| − | ‘smpte170m’
| + | |
| − | SMPTE 170 M
| + | |
| − | | + | |
| − | ‘smpte240m’
| + | |
| − | SMPTE 240 M
| + | |
| − | | + | |
| − | ‘ycocg’
| + | |
| − | YCOCG
| + | |
| − | | + | |
| − | ‘bt2020nc’
| + | |
| − | ‘bt2020_ncl’
| + | |
| − | BT.2020 NCL
| + | |
| − | | + | |
| − | ‘bt2020c’
| + | |
| − | ‘bt2020_cl’
| + | |
| − | BT.2020 CL
| + | |
| − | | + | |
| − | ‘smpte2085’
| + | |
| − | SMPTE 2085
| + | |
| − | | + | |
| − | ‘chroma-derived-nc’
| + | |
| − | Chroma-derived NCL
| + | |
| − | | + | |
| − | ‘chroma-derived-c’
| + | |
| − | Chroma-derived CL
| + | |
| − | | + | |
| − | ‘ictcp’
| + | |
| − | ICtCp
| + | |
| − | | + | |
| − | color_range integer (decoding/encoding,video)
| + | |
| − | If used as input parameter, it serves as a hint to the decoder, which color_range the input has. Possible values:
| + | |
| − | | + | |
| − | ‘tv’
| + | |
| − | ‘mpeg’
| + | |
| − | MPEG (219*2^(n-8))
| + | |
| − | | + | |
| − | ‘pc’
| + | |
| − | ‘jpeg’
| + | |
| − | JPEG (2^n-1)
| + | |
| − | | + | |
| − | chroma_sample_location integer (decoding/encoding,video)
| + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘left’
| + | |
| − | ‘center’
| + | |
| − | ‘topleft’
| + | |
| − | ‘top’
| + | |
| − | ‘bottomleft’
| + | |
| − | ‘bottom’
| + | |
| − | log_level_offset integer
| + | |
| − | Set the log level offset.
| + | |
| − | | + | |
| − | slices integer (encoding,video)
| + | |
| − | Number of slices, used in parallelized encoding.
| + | |
| − | | + | |
| − | thread_type flags (decoding/encoding,video)
| + | |
| − | Select which multithreading methods to use.
| + | |
| − | | + | |
| − | Use of ‘frame’ will increase decoding delay by one frame per thread, so clients which cannot provide future frames should not use it.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘slice’
| + | |
| − | Decode more than one part of a single frame at once.
| + | |
| − | | + | |
| − | Multithreading using slices works only when the video was encoded with slices.
| + | |
| − | | + | |
| − | ‘frame’
| + | |
| − | Decode more than one frame at once.
| + | |
| − | | + | |
| − | Default value is ‘slice+frame’.
| + | |
| − | | + | |
| − | audio_service_type integer (encoding,audio)
| + | |
| − | Set audio service type.
| + | |
| − | | + | |
| − | Possible values:
| + | |
| − | | + | |
| − | ‘ma’
| + | |
| − | Main Audio Service
| + | |
| − | | + | |
| − | ‘ef’
| + | |
| − | Effects
| + | |
| − | | + | |
| − | ‘vi’
| + | |
| − | Visually Impaired
| + | |
| − | | + | |
| − | ‘hi’
| + | |
| − | Hearing Impaired
| + | |
| − | | + | |
| − | ‘di’
| + | |
| − | Dialogue
| + | |
| − | | + | |
| − | ‘co’
| + | |
| − | Commentary
| + | |
| − | | + | |
| − | ‘em’
| + | |
| − | Emergency
| + | |
| − | | + | |
| − | ‘vo’
| + | |
| − | Voice Over
| + | |
| − | | + | |
| − | ‘ka’
| + | |
| − | Karaoke
| + | |
| − | | + | |
| − | request_sample_fmt sample_fmt (decoding,audio)
| + | |
| − | Set sample format audio decoders should prefer. Default value is none.
| + | |
| − | | + | |
| − | pkt_timebase rational number
| + | |
| − | sub_charenc encoding (decoding,subtitles)
| + | |
| − | Set the input subtitles character encoding.
| + | |
| − | | + | |
| − | field_order field_order (video)
| + | |
| − | Set/override the field order of the video. Possible values:
| + | |
| − | | + | |
| − | ‘progressive’
| + | |
| − | Progressive video
| + | |
| − | | + | |
| − | ‘tt’
| + | |
| − | Interlaced video, top field coded and displayed first
| + | |
| − | | + | |
| − | ‘bb’
| + | |
| − | Interlaced video, bottom field coded and displayed first
| + | |
| − | | + | |
| − | ‘tb’
| + | |
| − | Interlaced video, top coded first, bottom displayed first
| + | |
| − | | + | |
| − | ‘bt’
| + | |
| − | Interlaced video, bottom coded first, top displayed first
| + | |
| − | | + | |
| − | skip_alpha bool (decoding,video)
| + | |
| − | Set to 1 to disable processing alpha (transparency). This works like the ‘gray’ flag in the flags option which skips chroma information instead of alpha. Default is 0.
| + | |
| − | | + | |
| − | codec_whitelist list (input)
| + | |
| − | "," separated list of allowed decoders. By default all are allowed.
| + | |
| − | | + | |
| − | dump_separator string (input)
| + | |
| − | Separator used to separate the fields printed on the command line about the Stream parameters. For example, to separate the fields with newlines and indentation:
| + | |
| − | | + | |
| − | ffprobe -dump_separator "
| + | |
| − | " -i ~/videos/matrixbench_mpeg2.mpg
| + | |
| − | max_pixels integer (decoding/encoding,video)
| + | |
| − | Maximum number of pixels per image. This value can be used to avoid out of memory failures due to large images.
| + | |
| − | | + | |
| − | apply_cropping bool (decoding,video)
| + | |
| − | Enable cropping if cropping parameters are multiples of the required alignment for the left and top parameters. If the alignment is not met the cropping will be partially applied to maintain alignment. Default is 1 (enabled). Note: The required alignment depends on if AV_CODEC_FLAG_UNALIGNED is set and the CPU. AV_CODEC_FLAG_UNALIGNED cannot be changed from the command line. Also hardware decoders will not apply left/top Cropping.
| + | |
