I had wanted to get some footage off of a commercial DVD, specifically it was that count down stuff that is at the beginning of a reel and some real dust and scratches that I could use to composit an old film look. When I tried to get the DVD footage into AE it wasn't reading it. The DVD files are in .VOB ------I was thinking that changing the extension may do the trick, or am I out of luck. I use CS4 on a Mac OX 10.5.7
well the chances are high that your commercial DVD is copy protected, thus you have scrambled vobs that are unreadable for AE. If it's protected then you'll have to find a way to unprotect it, but it's beyond the scope of ths forum (and may infringe some copyright if you don't have the authorisation from the original creators).