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

[Matthieu Bouron]

Hi there,

Here is a first attempt to write an audio filter which merge two audio streams.
Usage is:
ffplay -f lavfi "amovie=test1.mp3[a];amovie=test2.mp3[b];[a][b]mix=0.7:0.3[out]"

The volume of each streams can be configured and default to 0.5:0.5 is
not specified. It only support two s16 audio streams with same sample
rate.
Feel free to comment.

Matthieu
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