I used DVD Shrink 3.2 to backup one of my video DVDs. I used No Compression for the Menus and Extras, and I used automatic compression to compress the main movie. The encoding completed successfully to an .ISO file. I then used VirtualDrive to convert the file to VirtualDrive's native format. Finally, I opened the "virtual DVD" using CyberLink PowerDVD.
On the title screen, I can choose from four different chapters. The second two chapters don't play their associated movies. I also get the same result when I try to view the DVD with Windows Media Player.
Next, I backed up another video DVD with four chapters on the title page. This time, all but the fourth chapter worked.
The DVDs are bran new, so I doubt that is the problem. Also, I can preview all four chapters in DVD Shrink before encoding. It seems that the chapter "pointers" are getting lost/erased.