[FFmpeg-user] libavfilter : using amix

[Mr Artichaut]

It works. Thank you very much for your help and your patience.

The output format thing totally makes sense now that I think of it. It
didn't work first so I've also setup the channel layout in the sink and
then it was OK.

I've made a new gist with the working code :
https://gist.github.com/MrArtichaut/11136813

I will clean it a little but it's a good example for anyone trying to use
amix or something similar. Your messages were also very instructive.

Thank you again.