[MPlayer-users] audio stutter with DTS in matroska?

[Steven Adeff]

On Nov 11, 2007 8:22 PM, Ulion <ulion2002 at gmail.com> wrote:
> 2007/11/12, Steven Adeff <adeffs.mythtv at gmail.com>:
> > On Nov 2, 2007 9:08 PM, Ulion <ulion2002 at gmail.com> wrote:
> > > 2007/11/3, Steven Adeff <adeffs.mythtv at gmail.com>:
> > > > On 11/1/07, Ulion <ulion2002 at gmail.com> wrote:
> > > > > 2007/11/2, Vladimir Mosgalin <mosgalin at vm10124.spb.edu>:
> > > > > > Hi Steven Adeff!
> > > > > >
> > > > > >  On 2007.11.01 at 15:06:31 -0400, Steven Adeff wrote next:
> > > > > >
> > > > > > > > DTS audio cd is not supported by mplayer.
> > > > > > >
> > > > > > > darn =(  I'll look for an avi with DTS to test then.
> > > > > >
> > > > > > Well it may be not supported, but it works, and works very good (for
> > > > > > quite a long time, I must say). So don't hesitate to pick a track from
> > > > > > audio cd.
> > > > >
> > > > > Certainly it support decode the dts by libdca, but for passthrough,
> > > > > probably not by hwac3.
> > > > > I ever has a patch for ./libmpcodecs/ad_hwac3.c to detect all 4 kind
> > > > > of DTS streams, but not commited. Current hwac3 only support 48kHz DTS
> > > > > passthrough, you can find "DTS: Only 48kHz supported, REPORT BUG" in
> > > > > that file. DTS cd or wav probably is 44.1kHz, so the passthrough will
> > > > > failed.
> > > > > But you can force the audio format to lpcm to passthrough the DTS cd
> > > > > or wav, that works because the external decoder normaly can decode
> > > > > such dts stream without the passthrough work from hwac3.
> > >
> > > To passthrough DTS cd/wav, remove hwac3, and put '-ac +pcm' to your
> > > mplayer commandline, if it still not decoded by external decoder, try
> > > add '-format s16le' or '-format s16be' to commandline.
> >
> > but this just out puts the audio as a PCM stream right? that's all it
> > seems to be doing, the receiver doesn't show "DTS" on it like it does
> > it if I use '-ac hwdts'
>
> Yes, for DTS CD, some receiver can decode it from raw PCM stream, I'm
> using creative's DDTS-100 decode such pcm without problem. Probably
> your reciever can not decode such stream.

I don't see how it can decode DTS from a PCM stream, that just doesn't
make sense, either way, it didn't work except to output stereo PCM to
my receiver.


> >
> > AC3 passthrough works fine. i need to try and find an AVI with DTS. So
> > far i can only get DTS CD's to play with the +pcm option, but no
> > surround.
>
> Did you try '-format s16le' or '-format s16be' on DTS CD?

both of those gave the same hiss sound.

I need to find an AVI with DTS (or make one from the Crank DTS track
and some random xvid video) and see if that works.

-- 
Steve