User Manual

This results in a second keyframe being placed in the ruler of the Tracker graph.
Two keyframes creating rotoscoped animation in addition
to any motion tracking that’s applied
5 With your first two keyframes placed, scrub the playhead back and forth between them
to evaluate how well the window’s animation is automatically interpolating to fit the
motion of the subject you’re isolating. If the window doesn’t follow the motion of your
subject well enough, move the playhead to the frame where the window divergence is
the most pronounced and make another adjustment to correct the shape.
A frame between the two keyframes you’ve
rotoscoped that needs further adjustment
This creates another keyframe.
After adjusting the in-between frame
6 When you’re finished making adjustments between your first two keyframes, move the
playhead farther along and add keyframes as necessary to make the window follow the
motion of your subject.
In general, look for the frames where your subject’s motion starts, stops, speeds up,
slows down, or changes direction. As you work, it’s good to try and add the fewest
number of keyframes you can to ensure smooth motion from one to another. Too many
keyframed adjustments made too close together for a smoothly moving subject risks
adding jerky motion if you’re not careful. On the other hand, if you have an erratically
moving subject, you may have to add more keyframes, possibly frame by frame, to
achieve the desired result.
Chapter – 121 Motion Tracking Windows 2760