So this is a fun one -- I have a two pass "motion control" shot where one of the passes as a section with a bunch of excess and extra jitter and shaking. Needless to say, comping the two passes together shows off the problem spectacularly. What I am trying to do is come up with a way to either remove the jitter from the one plate such that it's underlying smooth move isn't affected (and still matches it's sister pass) or add the jitter from the one pass on top of the motion in the other pass. I am running a smooth camera analysis as I write and will report back as to whether that helped bring the two passes into alignment.
But here is what I am trying to sort out in my head: I can track both passes and when I look at the curves for each track from each pass, much of the motion is the same, with a few frames here and there of divergence. I thought that maybe I could stabilize one of the plates using the track of the other, and in the end cancel out the excess jitter -- that doesn't work. But it's basically a math problem:
pass1x = pass2x+jitter
pass1y = pass2y + jitter.
pass2x-pass1x = jitterx
pass2y-pass1y = jittery
By minusing pass one from pass two, I should end up with only jitter, which I can then add back onto pass one. Problem is, I don't know how to do this using Shake nodes!
So, if this makes any sense at all and you see a solution, I'd be extremely grateful!
j