Stuttering HD Playback in GBPVR

[mark_lt]

Hi,

I know this is dealt with other places on the forums, but have battled to make sense of it, and how I can resolve my issues.

Simply, if I play a video at 1280x720 through GBPVR it stutters every few seconds, but if I play it through media player on the same pc it runs fine.

Things I have tried:
1) using FFMpeg to drop the bitrate to less than 1000k/s. Quality obviously is a shocker but playback still stutters (using a qscale of 31)
2) Reduce resolution. Anything above 720x576 stutters, but at 720x576, even using a qscale of 2 or 3, it plays fine, so I assume it can't be bitrate.
3) Have tried (all separately), changing from VMR9 custom to exclusive, changed the decoder from FFDShow to default to Cyberlink.
4) I have manually changed the CPU priority for PVRx2.EXE to high

What I have figured out, I think, is that every few seconds, something in GBPVR is spiking the CPU usage, which makes the video stutter. I found this through playing the video through Media Player, whilst having GBPVR running in the background.

I know the specs question will come up: Athlon XP2400+ 2Gb Ram, MX440 graphics card.

Is there anything I should look out for in GBPVR that is spiking the CPU usage on a regular basis, or do I have to just accept that for my PC, GBPVR will not playback HD?

Thanks
Mark

[mark_lt]

As per usual, it pays to look a bit first. Thread from today:
http://forums.nextpvr.com/showthread.php?t=44635

I have changed to overlay manager, which means the playback is smooth as can be. I suppose it is about accepting the baggage that brings (stuttering playback when graphics are shown), but I can live with that. Unless some has something interesting to add to this consider the thread closed!

[sub]

If I were you, I'd look into updating that videocard. A MX440 is pretty dated now, and probably struggling watching 720p highdef content. WMP puts slightly less demands on the card because it uses it's renderer video passthrough mode, wheras GB-PVR has to use mixing mode (to support OSD graphics).

[mark_lt]

Thanks Sub. Totally agree. Thanks for the explanation though. Always nice to have a justification to spend money on the PVR.