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98247e3368
"analyzeduration" is not used to detect the input duration, but to specify the max probe data duration. Fix option description and related doc entry accordingly.
174 lines
4.4 KiB
Plaintext
174 lines
4.4 KiB
Plaintext
\input texinfo @c -*- texinfo -*-
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@settitle FFmpeg Formats Documentation
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@titlepage
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@center @titlefont{FFmpeg Formats Documentation}
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@end titlepage
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@top
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@contents
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@chapter Description
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@c man begin DESCRIPTION
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This document describes the supported formats (muxers and demuxers)
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provided by the libavformat library.
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@c man end DESCRIPTION
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@chapter Format Options
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@c man begin FORMAT OPTIONS
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The libavformat library provides some generic global options, which
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can be set on all the muxers and demuxers. In addition each muxer or
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demuxer may support so-called private options, which are specific for
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that component.
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Options may be set by specifying -@var{option} @var{value} in the
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FFmpeg tools, or by setting the value explicitly in the
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@code{AVFormatContext} options or using the @file{libavutil/opt.h} API
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for programmatic use.
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The list of supported options follows:
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@table @option
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@item avioflags @var{flags} (@emph{input/output})
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Possible values:
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@table @samp
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@item direct
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Reduce buffering.
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@end table
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@item probesize @var{integer} (@emph{input})
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Set probing size in bytes, i.e. the size of the data to analyze to get
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stream information. A higher value will allow to detect more
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information in case it is dispersed into the stream, but will increase
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latency. Must be an integer not lesser than 32. It is 5000000 by default.
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@item packetsize @var{integer} (@emph{output})
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Set packet size.
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@item fflags @var{flags} (@emph{input/output})
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Set format flags.
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Possible values:
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@table @samp
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@item ignidx
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Ignore index.
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@item genpts
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Generate PTS.
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@item nofillin
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Do not fill in missing values that can be exactly calculated.
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@item noparse
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Disable AVParsers, this needs @code{+nofillin} too.
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@item igndts
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Ignore DTS.
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@item discardcorrupt
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Discard corrupted frames.
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@item sortdts
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Try to interleave output packets by DTS.
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@item keepside
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Do not merge side data.
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@item latm
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Enable RTP MP4A-LATM payload.
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@item nobuffer
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Reduce the latency introduced by optional buffering
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@end table
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@item analyzeduration @var{integer} (@emph{input})
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Specify how many microseconds are analyzed to probe the input. A
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higher value will allow to detect more accurate information, but will
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increase latency. It defaults to 5,000,000 microseconds = 5 seconds.
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@item cryptokey @var{hexadecimal string} (@emph{input})
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Set decryption key.
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@item indexmem @var{integer} (@emph{input})
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Set max memory used for timestamp index (per stream).
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@item rtbufsize @var{integer} (@emph{input})
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Set max memory used for buffering real-time frames.
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@item fdebug @var{flags} (@emph{input/output})
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Print specific debug info.
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Possible values:
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@table @samp
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@item ts
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@end table
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@item max_delay @var{integer} (@emph{input/output})
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Set maximum muxing or demuxing delay in microseconds.
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@item fpsprobesize @var{integer} (@emph{input})
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Set number of frames used to probe fps.
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@item audio_preload @var{integer} (@emph{output})
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Set microseconds by which audio packets should be interleaved earlier.
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@item chunk_duration @var{integer} (@emph{output})
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Set microseconds for each chunk.
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@item chunk_size @var{integer} (@emph{output})
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Set size in bytes for each chunk.
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@item err_detect, f_err_detect @var{flags} (@emph{input})
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Set error detection flags. @code{f_err_detect} is deprecated and
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should be used only via the @command{ffmpeg} tool.
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Possible values:
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@table @samp
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@item crccheck
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Verify embedded CRCs.
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@item bitstream
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Detect bitstream specification deviations.
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@item buffer
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Detect improper bitstream length.
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@item explode
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Abort decoding on minor error detection.
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@item careful
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Consider things that violate the spec and have not been seen in the
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wild as errors.
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@item compliant
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Consider all spec non compliancies as errors.
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@item aggressive
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Consider things that a sane encoder should not do as an error.
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@end table
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@item use_wallclock_as_timestamps @var{integer} (@emph{input})
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Use wallclock as timestamps.
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@item avoid_negative_ts @var{integer} (@emph{output})
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Shift timestamps to make them positive. 1 enables, 0 disables, default
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of -1 enables when required by target format.
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@end table
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@c man end FORMAT OPTIONS
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@include demuxers.texi
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@include muxers.texi
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@include metadata.texi
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@chapter See Also
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@ifhtml
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@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
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@url{libavformat.html,libavformat}
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@end ifhtml
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@ifnothtml
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ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libavformat(3)
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@end ifnothtml
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@include authors.texi
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@ignore
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@setfilename ffmpeg-formats
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@settitle FFmpeg formats
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@end ignore
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@bye
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