I've used Cleaner 5 for the last few months with no problem but now when I try to export anything QuickTime it spends a lot of time generating black frames.

The source is a 720x480 avi that I outputted using AfterEffects. 30 FPS. It shows up in the input window of Cleaner 5 just fine.

I'm trying to narrow down the obvious problems. The source plays fine by itself. There is no cropping going on, no odd start or begin frames...

Hmmm the problem seems to reside with my source file. I tried Cleaner again with a different avi and it worked.