The Boondock Saints II

[MT2008]

(No, this isn't about the movie itself; it's a technical issue)

I have been trying to screencap "The Boondock Saints II" since last night, and I'm having trouble. Whenever I try to run the Blu Ray through VLC, my images keep coming back with a whole bunch of artifacts, which looks really messed up. I've never had this problem with any other Blu Ray before. Does anyone else use VLC and have any idea what the problem might be?

I've also looked at the VLC forum; no help so far.