see the post below. I checked the file i converted & its good except that the sound near the end gets out of sync so i've still got to tweak the audio settings. the video was pretty good though
cheers
i had the same problem trying to convert mp4 to avi, it kept saying cant set up output file. After reading SFKenK's reply i checked the encoder. It was native mpeg so i changed to a divx codec (Divx 5.2.1) and it worked fine