Myself, and a few others that I know, have been interested in converting some .avi files into iDVD ('05, don't have '06 yet) compatible files. Now, running the .avi file through ffmpegX I'm able to create a .mp4 video which is compatible with iDVD; however, when imported into the iDVD program the files size is nearly tripled (A 233.5mb files becomes 2.9gb). This, of course, is no good... It would be useless to burn only one movie on the disc, when I could burn a whole bunch of movies in plain old .avi format. But leaving in the .avi format means I can watch them on a normal DVD player. So am I missing a step, or is this just something that can't be done?