vlc not decoding certain DVDs

[Joachim Rosenfeld]

Why is vlc (the CSS library specifically) unable to decode certain
CDs? Certain foreign film CDs work fine, but others, mostly US-based
Hollywood films don't. I was under the impression that vlc was able to
decode everything? I can hear audio on these DVDs, but the video is
weird blocks of color.

The weird thing is that if I run vlc under WINE, everything works
fine. The movie plays, but fullscreen doesn't work and the interface
is really horrible on vlc/wine.

Any solutions on how to fix this?

I am running 7.0-RELEASE on an x86 box.

All ports are up to date as of 3 days ago.