Dave wrote: >It also makes a big difference what codec the video is >compressed with. Sorenson, for example, takes a lot of >your CPU to run. Try expoerting it from QT Player as >DV. Even though it's much bigger, it will play back >with less strain. Funny - I never have problems with Sorenson codec movies..... To the original poster: I just thought of something else that I do that helps. I export the movie (using Sorenson) but I specify a key frame *EVERY* frame. This way I know that I'm getting 25 fps - I have checked this using movies with burnt-in timecode and have proved that I "lose" frames unless the key frames are every frame. Regards - Colin