[FFmpeg-user] ffplay does not seems to downmix 5.1ch audio to Stereo with "-ac 2"

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Nov 19 13:46:53 CET 2014

Kimio Miyamura <xanadu <at> apost.plala.or.jp> writes:

> If I use "-ac 2" with ffplay like the following, 
> seems to right side channel sound have lost.

I cannot reproduce this with a random sample here...
Do you see anything suspicious if you press "w" while 
playing to see a visualization?

> $ ffplay -i test.mp4 -ac 2

Please test the following:
$ ffplay -i test.mp4 -af aresample=ocl=stereo

Carl Eugen

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