I'm running under Mavericks 10.9.5.
My input is a DVD created from a DVR, and it contains a single folder called VIDEO_TS which expands to other files with .BUP, .IFO, AND .VOB extensions.
Just inserting the DVD brings up the DVD Player and everything works fine, until I start a New Screen Recording under QuickTime. That grays out the screen and that's what gets recorded -- gray. (This same thing started happening when I was using Snapz Pro X to do the capture.) Both techniques used to work fine. I can't say if it started failing when I upgraded from Snow Leopard to Mavericks.
This failure does NOT occur if my input has a .mov extension.
Any help on this would be greatly appreciated.