Umcbot3

Almost 20 years later, but I had the exact same problem as you, and just resolved it today. It's very likely we are working with the same sources of DVD's. I can't go into details, but I'm sure it's the same. They aren't .iso files, so most ripping software won't figure it out. Forget the 7zip thing, too. That won't work. You need a PC, first off. I have a Mac DVD drive connected and installed the bootcamp drivers to make the PC detect it. Open the "Player.exe" program. It should be in the root directory of the DVD, or the first folder. Make sure you open the application, and not the icon file, obviously. In that software, navigate to the DVD drive, and highlight the DVD's video files, right click, convert, AVI. You can transcode out of .avi depending on your end goals.