Apple Motion 5.1.1 User Manual
Page 982
Chapter 22
Motion tracking
982
For fine-tuning, you can zoom in and out of the clip using the Zoom tool. The zoom follows the
pointer, so place the pointer on the track point in the Canvas and drag right to zoom in. Drag
left to zoom out of the clip. To return to normal view, choose 100% from the Zoom Level pop-up
menu (above the right side of the Canvas). If you have a Multi-Touch trackpad, pinch open or
closed to zoom in or out, then scroll the zoomed view using two-finger swipes.
You can also adjust a tracking curve in the Keyframe Editor. For more information on using the
Keyframe Editor, see
on page 439.
Delete bad keyframes in the Keyframe Editor
When an analysis is complete, you might need to retrack a portion of the clip. Rather than
tracking over bad tracking keyframes, delete bad keyframes before retracking. If bad keyframes
are not deleted, the tracker may continue to use the old reference point.
1
Position the playhead at the frame where you want to retrack the reference pattern.
2
In the Keyframe Editor, drag to select the keyframes you want to delete.
If the Keyframe Editor is not visible, click the Show/Hide Keyframe Editor button in the bottom-
left corner of the Motion project window.
3
Control-click in the Keyframe Editor, then choose Cut from the shortcut menu (or press Delete).
4
In the Canvas, drag the tracker to the reference point, then click Analyze.
New track keyframes are created.
Tip: When dealing with multiple problem trackers, you can turn off the trackers you are not
correcting to simplify the Keyframe Editor. Additionally, when fine-tuning tracks in the Keyframe
Editor, you can simplify what appears in the graph. The following image displays all curves for a
simple four-corner pin.
67% resize factor