TV recordings and lie TV stuttering.

[athomas]

I have noticed this for a while now. My TV recordings and my live TV video stutters ever so slightly. The audio is fine. I use the Nvidia Purevideo codecs for my playback in PVRX2. When I run windows media player on the same file, it plays fine with the Purevideo codecs. I'm not using all my resources. They show less than 10% usage when watching live tv in full screen.

I have upgraded to the latest PVRX2. It didn't fix the issue, so it is something common to both the latest and previous install.

Any suggestions would be great.

I have included my log files for when I watched one of the recordings.

[athomas]

I forgot to mention, that videos play fine. Its just the mpg recordings that have problems.

[athomas]

I got it working. I turned off the hardware acceleration in the Purevideo settings screen and it seems to work fine now. Its strange. It worked fine using hardware acceleration when playing the same videos in windows media player using the Purevideo decoder, but not when playing the file in PVRX2 using the Purevideo decoder. At least now there is no stuttering. The CPU is still down around 10% when playing mpgs.

[athomas]

Well, I'm not getting stuttering, but I'm getting tearing in the picture when panning scenes. This occurs even when playing avi movies.

My video is geforce 7050 video with 250 meg ram with HDMI output, so it should handle basic mpeg recordings quite well. It handles the same file on full screen output on windows media player without any problems using the same codec. So, there has to be something that PVRX2 loads that is causing an issue with playback. I just don't know what it is and can't seem to find it.

My CPU generally runs about 10% when playing movies or video. When playing movies with the Purevideo decoder, the GPU never goes above 50% for high definition content, even when using PVRX2. It shouldn't be tearing the picture.

My system is an:
AMD Athlon X2 5000+ CPU
2 Gig DDR2 system ram
Geforce 7050 video with 250 meg ram
500 Gig WD Sata HDD high performance SE 16 drive
WinTV PVR 150
WinTV PVR 250

This is driving me nuts. Any help would be appreciated. Thanks.

[mikeh49]

I don't have any good answers for you, but here are a few comments from my own experience and from others in the forum:

[INDENT]WMP probably looks OK because it is using the Overlay renderer. PVRX2 usually uses the VMR9 renderer, although Overlay is now available in the latest release. I don't know how to specify a different renderer in WMP, but if using the same decoder and renderer, WMP should look just like GBPVR.[/INDENT]

[INDENT]Tearing seems to be a fairly common Nvidia problem, I'm not sure it is due to the Purevideo decoder or the video card, although probably the video card/drivers. There has been a lot of discussion in the past about what drivers to use, search for posts by ShiningDragon and csy.[/INDENT]

[INDENT]I have a Geforce 6200 and it was fine using the GBPVR UI with Purevideo and S-video out to a SD CRT TV at 720X480 resolution (standard NTSC). When I got a LCD TV and switched to PVRX2 with VGA or DVI out at 1366X768 resolution, stuttering and tearing appeared using any VMR9 renderer. FSE was better, but it has problems coming out of standby. So I installed .Net3 and am currently using the EVR renderer. There is no tearing, although quick pans could be smoother. CPU load is about 35% on a Sempron 2800. I'm now using the Cyberlink decoder from PowerDVD 7 and Nvidia 94.xx drivers.[/INDENT]

In summary, your problems are not unusual. I'm thinking one needs a significantly more powerful video card/GPU when going to the higher resolutions of an LCD TV. People with Geforce 7600 and Radeon 9600 or higher seem to do better, but there seem to be so many variables that I haven't yet seen the definitive solution.

[whurlston]

My video is geforce 7050 video with 250 meg ram with HDMI output, so it should handle basic mpeg recordings quite well.

I have a 7050 board and ended up installing a 2400 Pro. Despite what they say about the 7050, I found it to be woefully underpowered.

[athomas]

I don't have any tearing issues when playing high definition content in full screen outside of PVRX2, so I know the geforce graphics can handle it quite well. I'm going to try the new March release of quartz.dll to see if that helps. There have been known issues with the quartz.dll file and directx.

It definately may be related to the overlay vs VMR9. I'm actually going to try to force the same renderer using graphedit to see if I can make it act like PVRX2. If it does get the same issues, I'll at least know where the problem lies. Then I can try to figure where to concentrate my efforts to fix it.

The issues are not just the purevideo problem. I had the same tearing issues when forcing ffdshow as well. Purevideo had its own problems with the stuttering when hardware decoding was selected though.

[Elmo Putney]

May or may not be related, but I get tearing after a wake up from standby or Hibernate, if I close pvrx2 and re-open it goes away.

Do you still have tearing after a fresh boot?

[stustunz]

try in this order
set video decoder system default(important step to get hardware accel to work properly dont ask my why )
play video and check to see if nvidia pure video icon shows in task bar if it does then go to next step if it doesnt reinstall nvidia pure video (remove any decoders you are not using)
set your hardware accel to on
the set to full screen exclusive these settings give you the lowest cpu
i have tried all the reg tweaks etc that people have tried in the past this give me the best results

[athomas]

An update. The March issue of quartz.dll did nothing.

I ran the PVRX2 saved graph in graphedit. It had the same tearing as when played in PVRX2. When I changed to the video renderer listed in the direct show filters, no tearing was evident. Its definately the video renderer that is causing this. In the direct show list, I can't even see the video renderer that PVRX2 uses. Is there a way to call a specific video renderer from within PVRX2?