So, have you all seen Imagineer Systems Motor yet?
It's a new roto program that costs alot and uses a technology called Planar Tracking to help you roto faster. Watch that quick start video if you're interested (I recommend watching it before watching mine, so you know what we're replicating). I did, and all I could think the whole time was "After Effects can do that just fine".
The basic premise of planar tracking is to match up a virtual plane with something semi-planar in a scene (in their example, the side of a car is one plane, the front is another). Once your plane is tracked to match the thing representing the plane in the scene, your roto, if done on the plane you tracked in, will match up much faster and easier than normal (MUCH less keyframes). In Motor, the virtual planes are hidden under the hood. In AE, they'll just be solids.
So, rather than ramble on about it like I just did, I made a video tutorial.
Like I said, you should watch the Motor Quick Start first. If you watch that and think "holy cow thats amazing I have to have it right now how in the world does it do that i wish i could roto that fast!", then this is the tutorial for you!!
I think it's about 55 Megs, should be Mpeg4 compression. This is fresh out of my screen capture thingy, no additional compression, so if anyone has problems, let me know.
Also, this one has no audio. Most of the time, my audio doesn't line up with the video, so I have to do all this reworking of the audio... I didn't feel like doing it this time, so I just type in Wordpad instead of talking.
http://www.mackdadd.com/tutorials/Plana ... in_AE7.avi