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

[Steven Adeff]

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'


> > >
> > > Steven, since your AC3 play is no problem, maybe you can give me a
> > > sample for your problem DTS mkv. And also, try to add '-v' to mplayer
> > > commandline and grab the output message here to see whether any
> > > abnormal thing happens.
> >
> > Here's the output from a DTS CD...
>
> That's expected result.
>
> >
> > and here's the output from a mkv with a DTS track that stutters,
>
> Looks normal, do you have any AC3 passthrough or other DTS in avi to
> try and give the output?
> And also, please use rc2 or svn (that's better) version to give the
> output, rc1 is not supported.
> Thc Crank.mkv, can you give a short sample for test? Or I forgot, did
> this mkv passthrough correctly by other any player on your system? How
> about other avi with DTS track?

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.

-- 
Steve
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