1. High data rate. Try to get the data rate as low as possible on the actual videos.
2. Slow CPU speed. Some codecs like Sorenson rely on heavy compression and need lots of CPU power to play back.
3. Too many updates from Director - Try puppeting the tempo to 1 FPS while the video plays to reduce the number of times Director is trying to update the screen.
Contact
MMI
36 South Court Sq
Suite 300
Newnan, GA 30263
USA