Ask in the bug/tech support forum then, cause something is buggered if you run the normal AH progrm and run the film through there and still cant take screen shots and only hear ideling engine.
In the seperate viewer program, the quality of the capture depends greatly on the resolution and (even more importantly) on the compression coedec and setting you choose. I can get a razor sharp capture, but a 1 min avi would be 150 megs....so losing a little quality is usually a good thing;)