User Manual

Fortunately, the Tracker palette’s Frame mode makes it easy to animate shape changes you
make to windows in order to better follow a moving subject, a task often referred to as
rotoscoping. By following the motion of a moving subject, and making a series of automatically
keyframed adjustments to the window at every point the subject changes speed or direction,
you can make a window isolate a moving target with surprising precision.
Using Frame mode to rotoscope the window
to better follow the edges of her face and the
contours of the jaw
Furthermore, you can also use Frame mode to repair imprecise tracks where the window is
veering off course because of quickly or irregularly moving features. In these cases, you have
the option of manually tracking the window in Frame mode to fit the trajectory of the feature,
frame by frame.
Lastly, you don’t even have to have performed a track to use the Tracker graph in Frame mode
to keyframe animated changes to a window. In fact, using the Tracker graph in Frame mode can
sometimes be more convenient than using the Keyframe Editor in Auto Keyframe mode,
depending on what you’re doing.
Rotoscoping Controls
The Clip/Frame buttons determine whether or not you’re rotoscoping a shape.
 In Clip mode: Any changes you make to a window transform it over the entire duration
of that clip. In other words, you can track a window to a moving feature, and in Clip
mode any changes you make to the size, rotation, position, or shape of the window
occur equally from the beginning to the end of that clip.
 In Frame mode: Changes you make to a window automatically create a keyframe at
the bottom of the ruler in the Tracker graph. Making two or more changes to a window
in Frame mode results in automatically interpolated animation from one keyframed
window transformation to the next.
You can freely move back and forth between Clip to Frame modes to make changes to a
window. Even if you’ve keyframed a window to change shape, you can turn on Clip mode and
make an overall change to the window, enlarging it for example, that results in the window
being equally enlarged at every keyframe.
Chapter – 121 Motion Tracking Windows 2757