Originally Posted by Steve S. Kim (Post 1032162)

Yes vimeo's policy is to drop frames for HD footage. They retain 30fps for SD footage. Their reasoning is that 24fps requires a lot less bandwidth and cpu and that when they did their tests (like a year or more ago) 24fps was more likely to run smoothly on the average computer vs 30fps.

Of course a lot has changed since vimeo's inception but their arcane policy is still in place. Fingers crossed for change.

As for the choppy native 5d playback, my system is specifically vista 64bit with premiere pro cs4. I haven't tested it with any other NLE's. Playback through ffdshow, vlc player, coreavc, and quicktime viewer is all very smooth with a minimal cpu hit. My previous box was vista 32bit with core2 quad and I had the same problem with premiere cs4 and 5d files.

Mark: I haven't tried contacting cineform. I tried it both in mac and windows and had issues with both and didn't go beyond that. I'll probably look at it again with their next major revision.