Import the file into FCP and paste the tracking info to any other clip you want to superimpose.
Ease of Use
The newest version of Mocha for After Effects and Final Cut have exactly the same set up, so once you understand one, you understand the other. It's very easy to use once it's installed, and there are great tutorials on their website to get you started. Most tracking products require you to create a complicated, detailed mask, point by point, cutting out an image within a pixel of the edge in order to get good results. Watching the way Mocha cuts out an image will make you laugh with delight. You could almost do it with your eyes closed. You simply drag your control points around the edges of what you want to track...and I mean 6-8 points, not 6800! Mocha has the ability to find the edges of your element within the wide border you create. Talk about a time saver! Rotoscoping goes from a week-long process to a matter of minutes.
Now that you've rotoscoped a single frame in your video, you simply press the "Track Forward" or "Track Back" button. This will tell the software to go through your video clip and find all of the tracking points on your moving image. It's that easy. Very rarely will you have to make adjustments once this process is complete. It was only a couple of years ago that I would have to go through each frame of video and edit my control points to keep the motion tracking properly. Not only can you export the tracking data, but in concert with the Mocha Shape plugin, you can also transfer shape data. So any rotoscoping you do can immediately and cleanly be applied to your footage in Final Cut or After Effects. I recall the story of the effects editors for the first Star Wars film, where they had to go through each frame of film and paint by hand with iodine over each light-saber. Times they are a-changin'.
Easily create a mask of your moving image using the bezier or splines tool, and track your footage forwards and backwards.
Depth of Options
Once the software has put together the tracking data, there are a million possibilities. You can paste the tracking attributes into any other clip you like. The same tracking info can be used multiple times in order to create multi-level effects.
Probably my favorite addition to the options is that now you can work from Mocha straight to Final Cut with their new standalone system. Sometimes it's a pain to work in three programs at once, and it often leads to something getting lost in the shuffle. Now when I have a simple (or at least, what has now become simple) shot of a tv screen or a cellphone that I need to replace the screen on, I can do it in a matter of minutes.
Mocha 2 for After Effects has a few new features, and the old features are enhanced to work very well. The new features allow motion blur data to be transferred, edge feathering for rotoscoping, and of course the exporting of multi-layer shape data when used with the Mocha Shape plug in.
