So I have pixelated faces out of a project, at points frame by frame adjustment was neccesary as obviously the motion tracking is not perfect.
Everything looks tidy in the project monitor but not in the rendered videos where the square moves differently and occasionaly doesn't cover things.
More strangely the pixels do different things depending on the render format, h.264 has slighlty different result than HDV and 2 passing gives diferent result again.
I'm guessing the problem is due to my frame by frame adjustments, as the motion tracking is done to the clip itself but I do not understand why the format effects things.

Has anyone encountered this problem before or can anyone replicate it? Better still is there a simple solution I'm not seeing? I would prefer not to have to turn my frame by frame adjustments into individual clips...
This is on version 0.9.6.