>There’s a lot of things you can do with After Effects’ pixel-based tracker, but they require good footage and a willingness to experiment and tweak the tracks to get usable results.
The biggest drawback is that if any of the points become distorted (by motion blur, grain or perspective shift) or move off screen, you must resort to keyframing every frame. Enter the planar tracking technique, such as in Mocha.
The Mocha AE costs around $300, which is drastically cheaper than the full version of Mocha which goes for a cool $2.800. However, please note that it is a stand-alone app and not a plugin, and that it only does tracking and that the rotoscoping features from the “full” Mocha are disabled. Why the same name if the features aren’t the same? You tell me…
You can fake something similar in After Effects if you are willing to put in a bit more effort, but you’ll still not get away from AE’s pixel-based tracker and it’s quirks.