Unsupported video format with DVD player
WTH, Apple? I tried playing some older (2002-03) videos on my desktop and I get "An unsupported video format was encountered. Playback was stopped." These are not Hollywood DVDs; they're videos of high school shows produced by our local cable outlet, which has a production studio at the school. They've always played OK before and they still play just fine on my Macbook Pro, and they still work on the TV.
The Macbook is on Snow Leopard, but the iMac is on Lion, because I was forced to upgrade or I'd lose my MobileMe email addresses. So, it wasn't enough that the upgrade disabled Adobe Photoshop and Adobe In Design, and Audacity and Final Vinyl, which I've used in digitizing my LP collection, and a half-dozen games. Someone also decided Lion would eliminate support for some video formats, for reasons unknown. I used to be a real Apple partisan, but not after what's happened to me this year.
iMac, Mac OS X (10.7.4), iPhone 4S; iPad 3G; Macbook Pro