I recently made a video in final cut compossed of a few short clips from my Flip video camera. The entire video is about 40 seconds long. It only contains those few short clips (not their audio) and audio from a comercial i got off of youtube. When I send it to compressor the progress bar makes it about 55% of the way and then virtually stops. It says its still working but has 20 hours remaining. What is the problem and how do I get around it?