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

Carl Eugen Hoyos cehoyos
Wed Jul 28 15:19:18 CEST 2010

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).

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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