[mythtv-users] Graphics card recomendation
dylan.semler at gmail.com
Fri Aug 25 04:28:38 UTC 2006
On 8/24/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 08/24/2006 12:11 PM, Dylan Semler wrote:
> > According to the Nvidia driver's readme, the GeForce4 Ti models' XvMC
> > don't support "IDCT," only "motion-compensation." While I'm not sure
> > what either of those terms mean, I believe that mine is a Ti model and
> > am hoping that IDCT is an integral part of processing HD streams. So
> > I'm eyeing a 256MB 5200 for under $50.
> Both Motion Compensation (MC) and inverse Discrete Cosine Transform
> (iDCT) must occur when decoding an MPEG-2 video stream. So, if you're
> using XvMC and your card doesn't support iDCT, your CPU does it.
Hey that's great to hear!
So I realize that the cpu consumption results that I previously gave were a
bit biased, as mythtv was deinterlacing while mplayer was not. So I just
tested it again with mythtv not deinterlacing. At 1x, processor usage is
still peaked around 95%-99%, however if I slow it down to 0.5x, and only at
0.5x, it finally plays smoothly and cpu percentage is in the high 80s, low
90s. Going up to 0.55x will produce a prebuffering pause once every maybe 7
- 10 seconds.
I just tried running myth with XvMC and cpu is about 94% - 97% at 1.0x I
can't do much testing because the computer usually hangs after a few seconds
and requires a hard reboot.
Anyways thanks for the help
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