Rp Tutorials

I found a tutorial from awhile ago that detailed how to take automatic screencaps from VLC. Unfortunately, the program has been updated and changed now and therefore the options do not match up. Does anyone know how to take automatic screencaps of a DVD from VLC now, or even GOM player? Every time I try to bring up a DVD in GOM it shuts the program down for some reason, but it still works fine with downloaded YouTube videos.

Thanks in advance!