Despite a decent quality capture, there’s a pan judder problem which might come from a difference in frame rates. The iTunes extras are playing at 23.97fps but my capture device captures at 30fps. That will also cause issues when incorporating it into the main movie, which will again be at 23.97fps. So basically there’ll be some judder from the original capture, then it’ll be worsened by changing the frame rate a second time.

Unfortunately there’s no option to change the frame rate on the capture device, which is a shame as it would probably fix the problem 😦