On 08/19/2012 09:47 PM, Akihiro TSUKADA wrote:
> Hi, Justin
> thanks for the comment.
> 
>> This is not how it should be done. The coefficients should be exported
>> so that downmixing can be done at the user level using libavresample.
> 
> I understand.
> So the right way is adding those two parameters to AVCodecContext.
> I'll withdraw this [PATCH 2/2] for the moment.

Well, not quite.

It needs to export mix levels for channel groups, e.g. center mix level,
surround mix level, rear mix level, lfe mix level. and also the
preferred downmix mode. Note that the mix levels do not take coefficient
normalization into account.

Thanks,
Justin
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