[FFmpeg-devel] 5.1 AAC on 0.5 branch

Pascal Patry iscy
Mon Mar 9 17:53:07 CET 2009

I've been testing a lot of content on the 0.5 branch for regressions directly in FFplay. I 
found that AAC audio using multiple channels don't work properly.

FFplay correctly sets 'request_channels' to 2, but it seems to still get 5 channels from 
these streams.

An example of that kind of content can be found here:

Audio stream:
Stream #0.1(eng): Audio: aac, 48000 Hz, 5.1, s16

Stereo AAC streams are working perfectly. This is most likely a regression because an 
older version of the AAC decoder is able to downmix this video to 2 channels.

Is there any chance of getting that fixed for the release?

Thank you,

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