[MPlayer-users] Low voice with 6 channel DTS and libdca

[Giacomo Comes]

On Tue, Sep 18, 2007 at 07:38:18PM +0000, amadeo wrote:
> Dnia Tue, 18 Sep 2007 13:04:20 -0400, Giacomo Comes napisa??(a):
> [...]
> > I can play the sample without problem. Both downmixing to two channels
> > and decoding all the six channels and listen to each channel separately
> > (I don't have a 6 channels setup).
> > 
> > I don't know Swedish but if you listen in stereo any pay attention to
> > the words it is easy to tell which channel you are listening. In the
> > sample the order is L C R Ls Rs LFE.[...]
> You're right, this is indeed the order in which the channels are presented in the sample.
> I've already found out why one channel is played at such a low volume. It's because the center is played back through the subwoofer.
> To play DTS 5.1 sound correctly I have to remap the channels. Using the following option it works as intended:
> 
> -af channels=6:6:0:4:1:0:2:1:3:2:4:3:5:5
> 
> I wonder if it's just me that needs this remapping or if it is a general problem? 
> If it is, maybe this remapping could be done automatically. 
> It's annoying to have to do it for yet another codec besides AAC.

The channel order for multichannel audio codec are a mess
(except for ac3). There were two distinct patches that fixed
the problem but none of them has been applyed.
I'm planning to resurrect the thread again in the future once I 
have more spare time for coding.

Giacomo