Apple Shake 4 New Features - Manual (Page 54)

54 Chapter 2 Major Features and New Nodes
Try editing the analysis data
If neither of the prior solutions helps, try loading the confidence parameter into the
Curve Editor, then look for frames where the confidence parameter falls to 0. If the
image transformation at these frames stands out, you can try loading the translationX,
translationY, rotation, and/or zoom parameters within the motion subtree into the
Curve Editor, then delete any keyframes that create unusual spikes at those frames.
Removing Black Borders Introduced by Smoothing and Locking
When you use the SmoothCam node, the resulting transformations that are made to
the input image either to smooth or lock the shot cause moving black borders to
appear around the edges of the output image. While this is necessary to achieve the
desired effect, you probably don’t want these black borders to appear in the final shot.
There are several ways you can choose to handle this border.
Using the clipMode Parameter
The clipMode parameter provides different ways you can treat the size of the output
frame in order to include or exclude this black region. After you’ve analyzed the input
image and picked the settings necessary to smooth or lock your shot, you can choose
one of three clipMode parameters.
union
This option expands the rendered frame to include the full area within which the input
image is transformed. If you scrub through the SmoothCam node’s output with this
option turned on, the image appears to float about within a black frame larger than
itself. The frame size of the output image is larger than that of the input image.
intersection
This option contracts the rendered frame to exclude any black area. The result is a
stable output image that fills the frame, but with a frame size that’s smaller than the
input image.