DVDs burned on Sony RDR-VX500 ripping to Mac


I’ve got some DVDs I burned on a Sony RDR-VX500 stand alone VHS/DVD burner combo unit. I now would like to rip them onto my G5 Mac. When I put the DVD in it plays just fine, but it comes up on the desktop as something called “SONATA_VOLUME” and when I open the file the TS_VIDEO and TS_AUDIO files are not there - it’s just an empty folder.

Does anyone know of a work around for this? A way to reveal the files so I can rip them? I feel like Sony has put some sort of copy protection on these disks, which seems insane considering that they’re just dupes of my home videos…

Any ideas would really be appreciated!