seem to have hit a strange problem with mplayer and DVD playback. When I run mplayer with
mplayer /dev/cdroms/cdrom0 dvd://
everything start fine, and then is quits saying, basically, it cannot open the drive.
After much mucking about it seems that the problem was that there was no /dev/dvd and when I added the link all was fine.
I also found the same problem in gmplayer even after changing the settings to point to /dev/cdroms/cdrom0.
I must have missed something here, so if anyone has any ideas that would be great.
you should have run
mplayer -dvd-device /dev/cdroms/cdrom0 dvd://