[Tinwarble]

No, mine are all mkv/h.264 1080p @4.1 or @4.0, Handbrake encoded (all of which I have encoded myself and that have been tested on various media players, like my WDTV Lives as well as my RPi). I also don't see it if I skip forward/backwards, although if I skip backward multiple times in a row the vid will become pixelated for a few secs.

The jitter seems to primarily happen when the vid is panning (left to right or right to left) and looks like what happens when I turn the "motion enhancements" On on my TV.

To add to this. Trying figure out what is going on I've watched several of my movies with the Codecinfo on and there appears to be 2 issues.

One is that all my movies are encoded "same as source" (23.975) and XBMC reports the "fr:" as 23.975. However, even though for most of the playback the "fps:" shows 23.98, it will fluctuate between 24 and 23.90 at times, which isn't a issue, but it will also at times go as high as 24.14 which still doesn't seem be an issue and as low as 21.98 which does cause an issue. Once the fps goes below about 22.00 the playback will have a stutter, this doesn't happen often but does seem to happen with every video I've tried.

The other issues is that "vq" starts to become erratic. Again, for most the playback it will stay at 88%, but as playback goes on it will start going from 88% to 75% erratically (meaning it will change back and forth extremely quickly). It will stop at 75% on occasions the back to 88% then it may stay at 88% for a few moments to a few minutes then go back to erratically going back and forth again. I have also seen it drop to 63% at some points. I'm not sure if the "vq" has anything to do with the jitter playback, but besides the "fps" I can't see anything else that might be causing it.

I should also state that it is inconsistent, it doesn't always happen in the same place during playback and even skipping back and playing the same part of that video that was jittery or stuttering will not produce the same issue and the fps and vq don't seem to be related. So it's hard to reproduce and you just have to wait for it to happen.