[FFmpeg-devel] [PATCH 2/2] DCA - fix downmix

[Nick Brereton]

On 28 Jul 2010, at 14:19, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Nick Brereton <nick <at> nbrereton.net> writes:
> 
>>> Afaict, the 4.0 sample we have
>>> (A-codecs/DTS/Edward.Scissorhands.x264.DTS-4.0-48_24.mkv on
>>> samples.mplayerhq.hu) ends up with wrong channel order if converted to wav.
>> 
>> What's the correct order? With current code converting to wav I see L, R, C, S
>> in that order. (./ffmpeg -i Edward.Scissorhands.x264.DTS-4.0-48_24.mkv out.wav)
> 
> I realize that L, R, C, S would be correct, but if I convert the original to
> either wav or ac3, I get FL, FR, SL, SR (explaining why I hear center from
> surround left).

Did this ever work correctly? I suspect it's an issue mapping the AMODE field correctly. I'll have to debug this later.

> 
> mplayer Edward -channels 4 -ac dts and -ac hwdts plays correct, but ffplay and
> mplayer -ac ffdca redirect center to surround left
> 
> Carl Eugen
> 
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