[OT] Is there a way to capture still frames from .VOB video files?

[Martin Baxter]

Thought someone might know whether this is possible.

A client has sent me some video on DVD. The files have the extension 
.VOB. I can play them in Windows Media Viewer no problem, but I'd like 
to be able to grab individual frames for use in Photoshop or whatever. 
Anyone know if this is possible? And er, if so how it can be done.

Martin Baxter