Hi Rick, I did download and look at the comp you posted and tried to apply it to my comp. But I have to scale down the video to 10 (90% down from original size) to fit in my target screen but it falls apart when I scale it down. The Mocha AE tracking data does properly track the video clip at normal size but it won't allow me to modify, to scale down the video clip. I have tried six ways to Sunday to track the scaled down clip. A simple like this should be simple to achieve. Hence, my doubts that Mocha is the right tool for this job. Your workflow works for still images but not for a motion video source that is scaled down. And if I transform to fit the comp, then I will be working with an comp only 190 or so pixels wide. It doesn't make sense. I guess I don't understand the logic involved, it's way to convulted. In any case, I keep deleting the comp and starting from scratch with no results. Here are the images of a simple test comp that isn't working as well.   I lowered the opacity of the TV installation so you can see what I am dealing with. Notice that Mocha data does not scale down the background video to fit inside the mask. That should a simple process. Again, I don't think Mocha can track scaled down video. I read elsewhere that it can't. A pic of the controls. Again, thanks for your help.
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