Thanks for the info. I hadn't found that post, but it does sound in line with what some other posts were elluding to.
I've got to say it's pretty dissapointing. It sounds like the AMP processor just isn't powerful enough to cope with all encoding formats at 1080p...or it's just very picky about what formats it works well with.
I did some more testing, and found that clear doesn't stutter, but on clear, the judder is horrible in slow panning scenes
Pretty much as bad as with AMP off. Feels like very low fps.
At Standard or Smooth, the panning is smooth and clean between stutters. When it stutters, it actually looks like it's dropping out of AMP mode, dropping a few frames, and then jumping back into AMP a few frames ahead.
I tried your suggested custom settings, but found the judder was worse than AMP standard, and it still stuttered badly
Image contrast and color on this TV is great compared to my old CRT HDTV, but the jutter makes slow panning scenes look horendous without AMP on standard or smooth. But with AMP on, the stutter is unbearable!
Threads complaining about this seem to go back to 2007, so it's dissapointing that Samsung hasn't fixed this. It seems like they should be able to come out with AMP-style hardware/firmware that works seemlesly on all common encoding formats. I'd much rather have a smooth, solid image than USB and LAN ports.
Sorry for the rant...just really suprised and disappointed in the image quality of video playback. Seeing it so perfect for a few seconds gets you jazzed...and then the stuttering kills the buzz! Annoying