Then, I precomposed each re-stabilized clip (trimmed to the corresponding span in the timeline) so that I could then mask (as an Add) the area of the smear replacement. I would do this for each of the smeared points in the clip and adjust each Mocha Pro rendering for the span needed to cover each smeared area (usually there were two or three instances). Then, with each occurrence of smearing, I would go to the worst smeared frame in the run and re-stabilize that duplicate clip in Mocha Pro to that particular reference frame. So, what I did to resolve this was to take the initial stabilized rendering in After Effects and duplicate it the number of times to match the smeared instances in the clip. In doing so, any frame where a portion of the face appears that was not in the reference frame, the image would be smeared. Regarding my workaround: Since there was no part of the clip that showed the entire face, I chose the a frame closest to what may cover all the frames as my starting frame for stabilization. I’m not completely sure what you are looking for, but enclosed are a couple of screen shots for you to look at.

Mocha pro powermesh