[mythtv-users] Choppy HDTV playback
list-mythtv at bluecamel.eml.cc
Fri Feb 9 23:20:05 UTC 2007
On Feb 9, 2007, at 10:59 AM, Steven Adeff wrote:
> ah, yea, my 1600+ can barely cut it at 720p, and if I try 1080i
> without deint its a no go, though with XvMC it seems to work fine,
> except when an OSD is up =(
> I just can't justify upgrading just the processor on this system, I'd
> sooner spend a little more and get a mATX and 3200+ system and that
> won't happen for a while. I really don't watch much HD in the bedroom,
> 21" vs 65" in the living room...
Before diving into MythTV, and knowing I wanted to do HDTV playback,
I did lots of research on CPUs that could handle both 720p and 1080i
streams. I ran into the same thing seeing recommendations for various
CPUs where some people claimed the same CPU 'worked for them' vs
someone else who said they couldn't get it smooth.
I came the conclusion that motherboard and video card selection was
as important as the processor itself. (I'm not refering to xvmc
here!) My first MythTV system _should_ have been able to play back
HDTV. It was the Asus Pundit with the SIS onboard and a 2.8GHz P4
(iirc!) but the onboard SIS had trouble with my projector. For
compatibility with my projector I swapped in an ATI Radeon PCI card
and then later an Nvidia 5200 card. Neither handled the HDTV playback
as well as the onboard SIS did, even with xvmc. In the end I blamed
the PCI bus on the Asus Pundit and later went to a new box.
To anyone building a new MythTV HDTV box I would recommend that they
research CPU, motherboard, and video card equally as well. Dont'
count on xvmc bailing you out if you make a poor motherboard choice!
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