Apple Motion 4 - Manual (Page 1303)

Corner-Pinning Groups
You can corner-pin groups using the Match Move behavior. Use the following guidelines
for the best results:
• To corner-pin a 2D group, it is recommended that you select the Fixed Resolution
checkbox in the Group tab of the Inspector.
• To corner-pin a 3D group, you must select the Flatten checkbox in the Group tab of
the Inspector. If Flatten is not enabled for the group, the Four Corners option will not
be available from the Type pop-up menu in the Match Move parameters.
Once Four Corners is chosen from the Type pop-up menu, Four Corner is enabled in
the Properties tab of the Inspector, causing the group to be rasterized. For more
information on rasterization, see
Groups and Rasterization .
Using either of the above techniques may still result in dynamic resizing. If you receive
unwanted results, export the group, import the group, then corner-pin the object.
Parallax in 3D Groups
When match moving 3D groups that contain objects that are offset in Z space, parallax
is simulated. Parallax is the apparent shift of an object against a distant background
caused by a shift in perspective, such as a change in camera position.
To remove a parallax effect, select the Flatten checkbox for the tracked group in the
Group tab of the Inspector.
Saving Tracks
As with all behaviors in Motion, you can save tracking behaviors to the Library. Keep in
mind, however, that a tracking behavior needs to reference the tracked source object.
Therefore, it may make more sense to save the entire group that contains the tracking
behavior, as well as the source footage, to the Library.
To save a group to the Library
1 Open the Library and select the category into which you want to save the group, such
as the Favorites category.
2 Drag the group that contains the tracking behavior and its source (tracked) footage from
the Layers tab or Timeline into the stack at the bottom of the Library.
The group is added to the Library category.
To save a behavior to the Library
1 Open the Library and select the Favorites, Favorites Menu, or Behaviors category.
2 Drag the customized behavior you want to save from the Layers tab, Timeline, or Inspector
into the stack at the bottom of the Library.
When you save a customized item to the Library, it is saved in the
/Users/username/Library/Application Support/Final Cut Studio/Motion/Library/ folder.
1303 Chapter 19 Motion Tracking