[itsme213@hotmail.com]

Some sources are direct DVD copy (video_ts folder with contents etc.), some are ISO files.

Is there anything that can mount these as a "virtual DVD" so I can run Handbrake and convert to avi?

[mduell]

You can just point Handbrake to the VIDEO_TS folder or iso image.

[itsme213@hotmail.com]

Hmmm. I tried that and it picked up nothing from its scan of the directory. But DVD Player and VLC both play it fine, so the image is probably OK?

[Waragainstsleep]

Toast should be able to do something with it. Make a video DVD image then try and rip that. Or just burn the DVD then rip it again.

[besson3c]

mkisofs -dvd-video -o "DVD.ISO" /path/to/DVD/VIDEO_TS

will create a burnable image of your DVD called "DVD.ISO". You can mount this image and play it in DVD Player, or burn it as a DVD with Apple's tools.