| \input texinfo @c -*- texinfo -*- |
| |
| @settitle FFmpeg Formats Documentation |
| @titlepage |
| @center @titlefont{FFmpeg Formats Documentation} |
| @end titlepage |
| |
| @top |
| |
| @contents |
| |
| @chapter Description |
| @c man begin DESCRIPTION |
| |
| This document describes the supported formats (muxers and demuxers) |
| provided by the libavformat library. |
| |
| @c man end DESCRIPTION |
| |
| @chapter Format Options |
| @c man begin FORMAT OPTIONS |
| |
| The libavformat library provides some generic global options, which |
| can be set on all the muxers and demuxers. In addition each muxer or |
| demuxer may support so-called private options, which are specific for |
| that component. |
| |
| Options may be set by specifying -@var{option} @var{value} in the |
| FFmpeg tools, or by setting the value explicitly in the |
| @code{AVFormatContext} options or using the @file{libavutil/opt.h} API |
| for programmatic use. |
| |
| The list of supported options follows: |
| |
| @table @option |
| @item avioflags @var{flags} (@emph{input/output}) |
| Possible values: |
| @table @samp |
| @item direct |
| Reduce buffering. |
| @end table |
| |
| @item probesize @var{integer} (@emph{input}) |
| Set probing size in bytes, i.e. the size of the data to analyze to get |
| stream information. A higher value will allow to detect more |
| information in case it is dispersed into the stream, but will increase |
| latency. Must be an integer not lesser than 32. It is 5000000 by default. |
| |
| @item packetsize @var{integer} (@emph{output}) |
| Set packet size. |
| |
| @item fflags @var{flags} (@emph{input/output}) |
| Set format flags. |
| |
| Possible values: |
| @table @samp |
| @item ignidx |
| Ignore index. |
| @item genpts |
| Generate PTS. |
| @item nofillin |
| Do not fill in missing values that can be exactly calculated. |
| @item noparse |
| Disable AVParsers, this needs @code{+nofillin} too. |
| @item igndts |
| Ignore DTS. |
| @item discardcorrupt |
| Discard corrupted frames. |
| @item sortdts |
| Try to interleave output packets by DTS. |
| @item keepside |
| Do not merge side data. |
| @item latm |
| Enable RTP MP4A-LATM payload. |
| @item nobuffer |
| Reduce the latency introduced by optional buffering |
| @end table |
| |
| @item seek2any @var{integer} (@emph{input}) |
| Forces seeking to enable seek to any mode if set to 1. Default is 0. |
| |
| @item analyzeduration @var{integer} (@emph{input}) |
| Specify how many microseconds are analyzed to probe the input. A |
| higher value will allow to detect more accurate information, but will |
| increase latency. It defaults to 5,000,000 microseconds = 5 seconds. |
| |
| @item cryptokey @var{hexadecimal string} (@emph{input}) |
| Set decryption key. |
| |
| @item indexmem @var{integer} (@emph{input}) |
| Set max memory used for timestamp index (per stream). |
| |
| @item rtbufsize @var{integer} (@emph{input}) |
| Set max memory used for buffering real-time frames. |
| |
| @item fdebug @var{flags} (@emph{input/output}) |
| Print specific debug info. |
| |
| Possible values: |
| @table @samp |
| @item ts |
| @end table |
| |
| @item max_delay @var{integer} (@emph{input/output}) |
| Set maximum muxing or demuxing delay in microseconds. |
| |
| @item fpsprobesize @var{integer} (@emph{input}) |
| Set number of frames used to probe fps. |
| |
| @item audio_preload @var{integer} (@emph{output}) |
| Set microseconds by which audio packets should be interleaved earlier. |
| |
| @item chunk_duration @var{integer} (@emph{output}) |
| Set microseconds for each chunk. |
| |
| @item chunk_size @var{integer} (@emph{output}) |
| Set size in bytes for each chunk. |
| |
| @item err_detect, f_err_detect @var{flags} (@emph{input}) |
| Set error detection flags. @code{f_err_detect} is deprecated and |
| should be used only via the @command{ffmpeg} tool. |
| |
| Possible values: |
| @table @samp |
| @item crccheck |
| Verify embedded CRCs. |
| @item bitstream |
| Detect bitstream specification deviations. |
| @item buffer |
| Detect improper bitstream length. |
| @item explode |
| Abort decoding on minor error detection. |
| @item careful |
| Consider things that violate the spec and have not been seen in the |
| wild as errors. |
| @item compliant |
| Consider all spec non compliancies as errors. |
| @item aggressive |
| Consider things that a sane encoder should not do as an error. |
| @end table |
| |
| @item use_wallclock_as_timestamps @var{integer} (@emph{input}) |
| Use wallclock as timestamps. |
| |
| @item avoid_negative_ts @var{integer} (@emph{output}) |
| Shift timestamps to make them positive. 1 enables, 0 disables, default |
| of -1 enables when required by target format. |
| |
| @item skip_initial_bytes @var{integer} (@emph{input}) |
| Set number initial bytes to skip. Default is 0. |
| |
| @item correct_ts_overflow @var{integer} (@emph{input}) |
| Correct single timestamp overflows if set to 1. Default is 1. |
| @end table |
| |
| @c man end FORMAT OPTIONS |
| |
| @include demuxers.texi |
| @include muxers.texi |
| @include metadata.texi |
| |
| @chapter See Also |
| |
| @ifhtml |
| @url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver}, |
| @url{libavformat.html,libavformat} |
| @end ifhtml |
| |
| @ifnothtml |
| ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavformat(3) |
| @end ifnothtml |
| |
| @include authors.texi |
| |
| @ignore |
| |
| @setfilename ffmpeg-formats |
| @settitle FFmpeg formats |
| |
| @end ignore |
| |
| @bye |