[mythtv-users] X2 5000 enough to play HD?

[Chris Porter]

On Wednesday 27 August 2008 10:59:10 pm kanetse at gmail.com wrote:
> On Wed, Aug 27, 2008 at 10:34 AM, Brad DerManouelian
>
> <myth at dermanouelian.com> wrote:
> > Coorect. Turn off xvmc and enjoy beautiful full quality playback and
> > full color OSD.
> > Also you might want to enable 2 processors in your playback profile so
> > frontend will use one and X will use the other if you are playing back
> > something that takes more than half a core.
> >
> > There's a table on the wiki with processors and what they're able to
> > play back here (pay attention to the column that says "CPU w/o XvMC"
> > to know what to expect):
> > http://www.mythtv.org/wiki/index.php/XvMC:Example_CPU_Savings
> >
> > And one specifically for HD content here:
> > http://www.mythtv.org/wiki/index.php/HD_Playback_Reports
>
> Tried turning off XvMC; and although I did see a color OSD, the
> problems (HD stuttering) were the same as with XvMC on - namely
> stuttering in HD, and severe audio sync probls if skipping.  This is
> pointing me to a problem somewhere outside of the video decoding; or
> lack of CPU power.
>
> I am going to try Catalyst 8.3 drivers next; and if that fails, I'm
> going to move my backend recordings disks into this machine from my
> old master backend.  If that still fails; I'm going to consider that
> maybe kernel support for this chipset on Centos 5.2
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is the HD stuttering picture only or sound as well.

Try turning of Extra Audio Buffering in  Utilitis and Settings -> Setup -> 
Setting -> TV Settings -> Playback.

you could also turn on Aggressive Sound Card Buffering in Utilities and 
Settings -> Setup -> Settings -> General

I know for my setup I ended up having to turn on aggressive sound card 
buffering to get sound and playback right.