Edit: Addtional comment, 1/20/2007: As of update version 0.70e, you can load AVI files with xvid video, mp3 audio, for Zune WMV conversion. Correct operation has been verified either with or without "Use DirectShowSource" checked on the Advanced tab. However, on some computers only one or the other of these choices may work correctly, depending on your MP4 codec setup. The program author recommends installing ffdshow
to support the DirectShowSource option -- my experience is consistent with this.