Take a Screenshot of DVD Player in OS X
OK - so this is probably illegal, but who cares anyhow! Take a Screenshot of DVD Player in OS X. Apple prevents you from taking screenshots of DVD’s using the typical method of command-shift-3, but a simple UNIX command from a Terminal window will do the trick!
You can also use ‘DVD Capture’ a free program I found on version tracker one day… does a great job.
http://www.versiontracker.com/dyn/moreinfo/macosx/16324
Nice to have an interface sometimes for those not very familiar with the terminal.