I am trying to do a face overlay using trajectories. Whenever I pick time stamps on the frames, and then move the face overlay to match the character, the entire set of time stamps inches to the right by a few millimeters. The set will even move if I just click anywhere on the screen. Normally this wouldn't be a problem, but because I am doing face overlays on moving characters I am using many time stamps (about 13-15) This means that by the time I get to the last couple of time stamp frames, the first time stamps are not valid anymore (off face).
Is there a way to stop this from happening? Or maybe I am using a bad technique for doing these things?
Just to be more clear, I am trying to do something like in this video:
https://youtu.be/Ib_Wmm-l-bY?t=853
Trajectories seems to work well enough with this, but because of that bug with the moving time stamp set, it makes it very hard and frustrating to get it right.