Using Final Cut Pro 7, when I export "a quicktime movie" or export "using quicktime conversion," (even when I custom set the size of the movie file) quicktime reads the file this way:
Normal Size: 655x486
Current Size: 655x486
When I re-import the file into FCP, everything seems to be fine, however, I don't understand why quicktime is displaying the movie at 655x486. My only guess is that Quicktime (7.6.4), is trying to compensate for the square/nonsquare pixels issue.
Oddly, however, once I have the movie file opened in Quicktime, I can then export it from Quicktime and make a file that reads:
Normal Size: 720x486
Current Size: 720x486
What is happening here? I have not had this problem in previous versions of Final Cut.
We were having this same issue. Very frustrating until we found the fix - which is really simple. Once you export your clip from the timeline, open the resulting .mov file in Quicktime Pro. Open the Movie Properties window. Under the Presentation tab, un-check the "Conform aperture to" check mark. Your movie should change size to 720x486. Make sure and save the file and you should be set.