QUOTE(wendellbland @ Apr 3 2007, 08:20 PM)

Out of curiosity why would you try to convert it to avi?
Because I already have a movie in mp4 format, but I want to improve the quality, so I want to convert it to avi then back to mp4 in a better quality. And I do this because I don't know of any program that lets you improve the quality of a movie already in mp4 format.