[FFmpeg-user] Need more detailed description of the behaviour of the "-ac <channelcount>" option
christophgerstbauer at gmail.com
Fri Jul 3 08:36:25 CEST 2015
Am 02.07.15 um 12:49 schrieb 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
>> 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.
I tried the pan filter, it works very well when using ONE audio source
For example I use this syntax to spread 2ch source to 8ch target:
But what can I do when I want this?
I tried to use the anullsrc (to generate silence), but to use that
anullsrc would be a second audio input stream.
But how can I defind a second audio input stream in pan? I think this is
not possible. In the examples there is no hint for that.
Am I right?
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