Playing DVD movies with Xine

[RL]

I just installed Xine from ports because I have been having very odd
issues with ogle.  However, it says "there is no demuxer plugin to
handle /dev/acd0  Usually this means that the file format was not
recognized" when I attempt to play DVD movies.  Similarily, "xine -p
dvd:/" produces that same message, except it says there is no plugin
available to handle dvd:/

I'm lost :(
Is there some plugin I'm missing? Where do I get it?