[mythtv-users] High-Definition Playback performance data

[Scott Matheson]

What about nvidia 5200 that's not AGP, but rather PCI? I'm getting good 
SD but no dice on HD using a 5200 and an Air2PC both PCI... am I 
somehow swamping the PCI bus? The CPU pegs on HD playback (720 or 1080) 
load seems to be split between X and frontend. Video is still quite 
blocky and no sound. I'm spending today trying to get XvMC working with 
the new 7174 driver... unable to get it working so far. The CPU is a P4 
3.06 / HT so it should work without XvMC, right? Could it be an audio 
issue? I've tried it with audio and video timebase -- no apparent 
change.
Scott

On Apr 2, 2005, at 9:07 PM, Jarod Wilson wrote:

> I've lost track of the thread where I said something about trying a 
> GeForce
> 6200 in place of a GeForce 4 MX with an Athlon XP 1800 system, to see 
> if that
> would give any significant playback performance boost with High 
> Definition
> recordings. Well, the answer is no, not really, but a bit of a cpu 
> upgrade
> sure helped. Here's a quick summary of my findings today (from memory 
> though,
> wish I'd actually written it all down). In all cases, I'm using 
> libmpeg2 for
> decode.
>
> Athlon XP 1800 w/AGP GF4MX, 6629 nvidia driver:
>
> -Able to play back 720p, cpu around 85% used.
> -Able to play back 1080i without a deint filter, cpu around 95% used.
> -Stutter every second or two on 1080i with deint filter on, cpu 
> completely
> pegged.
>
> Athlon XP 1800 w/AGP GF4MX, 7174 nvidia driver:
> -Able to play back 720p, cpu around 70% used.
> -Able to play back 1080i without deint, cpu around 85% used.
> -Stutter every few seconds on 1080i w/deint filter on, cpu pegged.
>
> Athlon XP 1800 w/AGP GeForce 6200, 7174 nvidia driver:
> -Maybe slightly better, but no significant difference from the GF4MX.
>
> Athlon XP 2600 w/AGP GF4MX, 7174 nvidia driver:
> -Able to play back 720p, can't remember cpu usage.
> -Able to play back 1080i w/no deint, can't remember cpu usage.
> -Able to play back 1080i w/kernel deint filter enabled, cpu usage 
> fluctuates
> between 80 and 95%.
>
> I've decided to stick with the 2600 and GF4MX, and my secondary Myth 
> box can
> now handle 1080i programming without a problem. I'll get the missing 
> cpu
> utilization numbers one of these days...
>
> -- 
> Jarod Wilson
> jarod at wilsonet.com
>
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