[mythtv-users] 800 MHz P3 for HDTV
Rod Smith
mythtv at rodsbooks.com
Sun Mar 4 02:10:59 UTC 2007
On Saturday 03 March 2007 16:39, stan wrote:
>
> It seems if the display card is doing all the decoding work,
This is a false premise. When using a regular video card and XvMC, the video
card does *NOT* do "all the decoding work," or even close to it. XvMC enables
the video card to do **SOME** of the decoding work, but by no means all of
it. My understanding is that this isn't a limitation of the speed of the
video card, but of what types of operations XvMC supports vs. what types of
operations must be performed to decode MPEG-2 video. That is, some types of
computations must be performed by your CPU, given the designs of MPEG-2 and
XvMC. My guesstimate is that XvMC offloads 30-50% of the decoding work, based
on the system loads I've seen with and without XvMC.
> Is there a chance if I
>
> - Don't record while playing back
> - Don't run any servers on it
> - Don't do any remote file access
None of these measures will help. They might help if you have a ~3GHz system
that's on the edge, but for an 800MHz system they're about as much use as
fairy wings on a cement truck, to quote Michael Garibaldi from "Babylon 5."
--
Rod Smith
http://www.rodsbooks.com
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