When I play uncut footage, the video will skip 1 or 2 seconds. The audio will continue playing at normal rate. The footage I am using is ripped off a DVD (personal dvd 100% legal). The video is in DV format. The other time this happened, the video was in MPEG-4 format. What is causing this, and how can I fix it? It has happened on two separate occasions, and yes I have quit and restarted the program.