Was that the email where the same thing happened if you had even just one trial in the input file but it was running these video files? I'd also be curious to know if the codec used to compress the video altered the format. If you feel like checking, you can right click on the video files and select properties and then check to see the encoding properties. I mention this only because that implies a different problem that video size per se. In any case though, glad you found a solution and I hope your compression did not affect the quality too much.