I am encoding (think that's the term) avi's to dvd or vob files with dvdsanta or winavi. The vob, ifo and bup files are there and when i open the vob files power dvd plays the movie. I am assuming that the encoding is correct. I then burn using nero's dvd-video. I put the files in the video_ts folder and burn. most of the time it works. but majority of the times i make coasters. my dvd player will say no play. But i would say half of the ones that don't work will auto start in my dvd rom drive. the other half i have to open the file and it will play. My question is am i doing anyting wrong. or are there files that just don't let you encode or burn to dvd?