I have a few .mpg and avi files that I want to burn to DVD in iDVD but it won't let me drag and drop them in, I assume because of incompatible formats. I can convert them in QuickTime to a format that works but I want to use the native format of iDVD so it doesn't have to double-compress. What format should I save out of QuickTime as? Should I just open them in iMovie and export from there?