[Libav-user] avcodec_open2 is changing the channels and channel_layout... why?

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Oct 12 01:15:22 CEST 2012

Michael Bradshaw <mbradshaw at ...> writes:

> QuickTime reports it as mono. So does Windows Media Player. It plays
> ok in ffplay and QuickTime though (didn't try Windows Media Player).
> Seeing as remuxing the audio stream to plain .aac seems to have fixed
> the issue, I'm thinking the container might be bad. Do you know of any
> tools or options in ffmpeg to help validate that conclusion?

I would say you just have to open out.aac in QuickTime 
or am I wrong?

Carl Eugen

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