I want to rip some short clips to use for a school project. I need to go through lots of DVDs to get many clips. I plan to use MPEG Streamclip to rip DVDs: 1. Is it common for some DVDs to be protected so that they can not be ripped? or does the footage not come out right after being ripped for some protected DVDs? 2. If so to #1, is there a way around this? Thanks.