[FFmpeg-devel] [PATCH 1/1] Extend and clarify documentation for -ac ffmpeg option.

[Carl Eugen Hoyos]

Stefano Sabatini <stefano.sabatini-lala <at> poste.it> writes:

> --- a/doc/ffmpeg-doc.texi
> +++ b/doc/ffmpeg-doc.texi
> @@ -510,7 +510,9 @@ Set the audio bitrate in bit/s (default = 64k).
>  @item -aq @var{q}
>  Set the audio quality (codec-specific, VBR).
>  @item -ac @var{channels}
> -Set the number of audio channels (default = 1).
> +Set the number of audio channels. For input streams it is set by
> +default to 1, 

> for output streams it is set by default to the same
> +number of audio channels in input.

What about:
for output streams it is set by default to the same number of audio channels in
input. If the input file has audio streams with different channel count, the
behaviour is undefined.

Carl Eugen