[FFmpeg-devel] [PATCH] af_mix: mix two audio streams

Nicolas George nicolas.george at normalesup.org
Sat Mar 31 19:55:00 CEST 2012

Le duodi 12 germinal, an CCXX, Matthieu Bouron a écrit :
> This filter intends to be a simpler alternative to amerge+pan for
> basic usage in a user's point of view.

Others might disagree, but I believe the maintenance burden of feature
duplication far outweighs the benefits for the user.

> A good example would be adding a background music to a video.

Assuming the input is stereo, you can do that with
"[a] [b] amerge, pan=stereo:c0<c0+c2:c1<c1+c3".
That's not very hard, and a copy-pastable example in the docs does not
suffer from maintenance problems.
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