Quicktime 10 Save for Web Not Exporting Video
I have a .mp4 video that I am trying to 'Save for Web' but when I do the resulting .m4v has a white screen (no video) with the audio playing. The html file sometimes shows the thumbnail and sometimes doesn't, and when it is played it does the same thing.
The export for computer only takes 4 minutes, so it's clearly not exporting video.
Can anyone help?
Thanks,
David
iMac 27", Mac OS X (10.6.3)