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doc/ffmpeg: document -channel_layout/ch_layout options

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Signed-off-by: Marton Balint <cus@passwd.hu>
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Marton Balint 2024-05-18 17:10:28 +02:00
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doc/ffmpeg.texi
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@ -1719,12 +1719,21 @@ This is an alias for @code{-filter:a}, see the @ref{filter_option,,-filter optio
@table @option
@item -atag @var{fourcc/tag} (@emph{output})
Force audio tag/fourcc. This is an alias for @code{-tag:a}.
@item -ch_layout[:@var{stream_specifier}] @var{layout} (@emph{input/output,per-stream})
Alias for @code{-channel_layout}.
@item -channel_layout[:@var{stream_specifier}] @var{layout} (@emph{input/output,per-stream})
Set the audio channel layout. For output streams it is set by default to the
input channel layout. For input streams it overrides the channel layout of the
input. Not all decoders respect the overridden channel layout. This option
also sets the channel layout for audio grabbing devices and raw demuxers
and is mapped to the corresponding demuxer option.
@item -guess_layout_max @var{channels} (@emph{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 @command{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.
0 to disable all guessing. Using the @code{-channel_layout} option to
explicitly specify an input layout also disables guessing.
@end table
@section Subtitle options