i've used ulead movie factory a few times to make my dvd movies, i've usually got the mpeg2 movie which i re-encode to mpeg1 so i can fit a couple of films on a dvd-r disc, however i have some avi files which are smaller than mpeg1 but they dont seem to burn, it just keeps saying no room on the dvd-r disc, it only uses 3.2gb of the 4.3gb, i dont understand, is it just not compatable with AVI?