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Motion tracking using a Null Object

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Alex Grene
Motion tracking using a Null Object
on Dec 30, 2014 at 8:18:28 pm

Hi all,

I've got some slightly shaky dashboard-cam footage in AE 5.5; I've tracked the motion and gotten an excellent motion path from a track point in it. The track point, which is a passing streetlight, should be going in a direct diagonal line - instead, it jitters up and down as it moves, because the road was crappy.

I'd like to make that streetlight move in a diagonal line, shifting the other footage with it. I've been tinkering with Warp Stabilizer, but it keeps giving me these bizarre, stomach-jolting moves where the size of the entire background seems to shrink, like a zoom-dolly effect.

Is there a way to write a motion path for the streetlight to follow? I.E. instead of trying to manually shift the frame up and down with keyframes, or get frustrated with the bizarre side effects of Warp, I'm wondering if I can create a path and tell the tracked point to follow that path instead.

Thanks in advance,

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