Friday, March 12, 2010

Stabilizing motion in AE

Open a new After Effects Project:
-Drag the mov in Proj window onto the Comp icon to make a comp the same size and duration
-View menu/Show rulers
-drag from the rulers down to get horizon line (guide lines)

Window/Tracker
-select the layer and click "stabilize motion" button
-outer box: how far from frame to frame the computer's going to look for your unique pattern
-inner box: the unique pattern-thing that you're tracking (if it's linoleum, it would be the blob of gum that's stuck to it)
-attach point the point that your tracker sticks to: what your keyframes are made of.

Set the inner box first
set the outer box
if there's a moving camera (pan) "favor" one side of the outerbox for the search.

Use the Analyze and play forward OR (better yet) use the frame-by frame forward
-Once that area is off-screen, go back with Pg up key till the tracker is on-screen, go to Layer/Add marker (so I know I switched trackers.
-in the tracker controls hit Apply button

Stabilize more?
Click the STabilize motion button again, that makes a new tracker.
-repeat process.
Move the frame around using Position keyframes, and you'll probably have to scale the layer as well (at most 120% scale) OR if it's HD, stick it into an SD comp and do the position keyframing there.

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