[FFmpeg-user] Need more detailed description of the behaviour of the "-ac <channelcount>" option

[Nicolas George]

Le quartidi 14 messidor, an CCXXIII, Christoph Gerstbauer a écrit :
> Hello Carl, so what can I do when my target has more audio channel than the
> source?
> For example if I have a file with 2ch stereo and my target is 4ch (with ch3
> and ch4 silent) how can i do that? I need to generate silence for the last 2
> channels because I dont want to copy ch1ch2 to ch3ch4.

http://ffmpeg.org/ffmpeg-filters.html#pan

Regards,

-- 
  Nicolas George
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