Periodic jerkyness

I have found out that setting the refresh rate to 24p works fine on 24 FPS movies.

But 25 FPS Will judder /Stutter /skip / drop /whatever every minute, while 30 FPS will jerk more often. This happens even if framerate matches the refresh rate.

Interestingly enough I eliminated tearing using the ATI 8.9 proprietary drivers and setting the slider in Catalyst control centre all the way to the right for quality and then setting XBMC to use driver settings in system/screen

Kryspy

Still having periodic jerkyness with a brand new 8400 GS and running intrepid 8.10.

Running XBMC @ rev 16744

Did you set adjust refresh rate in settings/videos/player

Yes, they are in sync. 60 Hz on 30 FPS.

That's not the problem I think. It's just some issue with the flow of things.. Seems like something has a hard time every 30 secs. Tried xubuntu with FCE, normal ubuntu with and without compiz, killed pulseaudio etc.

It lags for a period of 2-5 secs after every 30 secs or so. Different kind of period on 25 FPS video. 24 FPS seems OK, not noticable.

Might this be a buffer problem? (I am running it off 1 GB lan, and I have tried locally too...)

What does the fps look like when the stutter happens? Also what about aq: in CodecInfo? does it dropp to zero? did you set triplebuffer to true on xorg.conf?

Am I correct that you guys are having no sound issues playing 24 FPS videos? I posted a while ago and couldn't get any confirmation that this worked. I have tried 24hz at both 23.976 and 24.000 and have had a/v sync issues. Wondering if you guys have any tips?

My prior post is below. At 24HZ I don't see the stuttering you guys describe.

schmoko Wrote:I'm wondering if anyone has had any luck mantaining audio-sync with any video content at 24hz?

Currently, playing any content at 60hz results in audio and video mantaining sync, regardless of source refresh rate (verified by OSD A/V display). Changing refresh rate to 24hz (via XRandR or the new Refresh Rate detection in SVN) results in A/V sync fluctuating between +0.05-0.09, which is fairly noticable with most content. I can verify the only difference between one setting and the other is the configured refresh rate.

This is more then likely not a CPU problem, as the issue occurs with both SD and HD material, and occurs when CPU usage on both cores is >30%. I'm starting to think it may be a deeper problem with my hardware configuration, and want to confirm that I'm not chasing an impossible configuration before I pursue it further.

Hardware is AMD X2 5600+ @2.9 Ghz with 8600 GT. Issue first appeared with Hardy and persisted once I upgraded to Intrepid Ibex. nVidia driver version is 177.80.

harryzimm Wrote:What does the fps look like when the stutter happens? Also what about aq: in CodecInfo? does it dropp to zero? did you set triplebuffer to true on xorg.conf?

When it stutters the FPS is the same as before. No frames dropped. Triple Buffer has been tried.

Edit: Added configs

Is there a test clip anywhere that demonstrates this?

Any xvid running 30fps.