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doc/ffmpeg: document -channel_layout/ch_layout options
Signed-off-by: Marton Balint <cus@passwd.hu>
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@ -1719,12 +1719,21 @@ This is an alias for @code{-filter:a}, see the @ref{filter_option,,-filter optio
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@table @option
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@table @option
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@item -atag @var{fourcc/tag} (@emph{output})
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@item -atag @var{fourcc/tag} (@emph{output})
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Force audio tag/fourcc. This is an alias for @code{-tag:a}.
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Force audio tag/fourcc. This is an alias for @code{-tag:a}.
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@item -ch_layout[:@var{stream_specifier}] @var{layout} (@emph{input/output,per-stream})
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Alias for @code{-channel_layout}.
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@item -channel_layout[:@var{stream_specifier}] @var{layout} (@emph{input/output,per-stream})
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Set the audio channel layout. For output streams it is set by default to the
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input channel layout. For input streams it overrides the channel layout of the
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input. Not all decoders respect the overridden channel layout. This option
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also sets the channel layout for audio grabbing devices and raw demuxers
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and is mapped to the corresponding demuxer option.
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@item -guess_layout_max @var{channels} (@emph{input,per-stream})
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@item -guess_layout_max @var{channels} (@emph{input,per-stream})
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If some input channel layout is not known, try to guess only if it
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If some input channel layout is not known, try to guess only if it
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corresponds to at most the specified number of channels. For example, 2
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corresponds to at most the specified number of channels. For example, 2
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tells to @command{ffmpeg} to recognize 1 channel as mono and 2 channels as
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tells to @command{ffmpeg} to recognize 1 channel as mono and 2 channels as
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stereo but not 6 channels as 5.1. The default is to always try to guess. Use
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stereo but not 6 channels as 5.1. The default is to always try to guess. Use
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0 to disable all guessing.
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0 to disable all guessing. Using the @code{-channel_layout} option to
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explicitly specify an input layout also disables guessing.
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@end table
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@end table
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@section Subtitle options
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@section Subtitle options
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