Just about any AVI file I open in virtual dub which is the recommended avi encoding program, gives me that error. I have the codes because I can watch the movies. Any problems? I would also like to know if it's not too much problem, what compressor to use when cutting the avi file or if I just want to re-encode it, leave it default? or select an option? if I leave it, will it use the same codec the video is encoded with?