This a rather techy article from Macworld but it is very useful. The quality of exported video from iMovie is often disappointing for a number of reasons. This article tackles only one format, 720 line HD, but the principles can be applied to others too. It’s well worth a read. If you understand it, fine. If not you may need a more elementary lesson in video formats.
How to Export 720 HD video from iMovie '09
March 3, 2009 by