I converted the mp4 videos to VOB using a mp4 to VOB converter. I did this because I HAD a program that would convert just about any file format to a VOB. I could then use the same program to burn the vob file to a DVD and it would play on any of my DVD players or on my PC. That program went south. So I then chose and downloaded the Roxio program thinking (maybe incorrectly) that roxio would be as simple and I could just take my converted mp4 video files to VOB and burn to a DVD and all would be good. I guess this is not the case. I did look at the properties in some of the VOB video files and there are items there, no zeros.