Rotoscoping Made Easy

Once upon a time, if you shot video and didn't like the background you could replace it by a technique called "rotoscoping". You accomplished this by going frame by frame and painting out the background, using an insanely expensive super super computer system. Now, After Effects in Adobe CS5 has a tool called Rotobrush which allows real people to replace backgrounds at will in no time flat. I replaced the background of an interview in a conference room in 20 minutes and most of that was render time. No portable green screen. No sweat. Oh, I forgot to mention, the replacement background was in motion... video. This is a game-changer for a lot of us.