Apple Shake 4 New Features - Manual (Page 37)

Chapter 2 Major Features and New Nodes 37
Adaptive
This option in the retimeMode pop-up menu uses advanced image analysis to
generate new in-between frames, creating seamless slow and fast-motion effects.
Selecting Adaptive reveals additional parameters.
• Motion: Two options determine the trade-off between image quality and processing
time—Fast and Best. Fast makes motion interpolations using a mesh warp, and works
well in most situations. Best, the most processor-intensive mode, uses motion vectors
to track each pixel from frame to frame, interpolating new frames.
• DeInterlacing: Similar to the Motion parameter, two options let you determine the
trade-off between image quality and processing time—Fast and Good. These
settings represent two levels of mesh warping used to interpolate data from both
fields of each frame. Here are some tips for using the DeInterlacing parameter:
• Good is actually a better setting for frames without any moving subjects.
• If you’re working with standard definition video, there is no difference between
using Fast or Good.
• The DeInterlacing operation can also be used to improve clips that were poorly
deinterlaced in other applications prior to importing into Shake.
Fast versus Best Settings for Adaptive Retiming
When setting up an adaptive timing operation, you might be tempted to simply
choose Best across the board for every parameter. This would probably be a
mistake—producing dramatically longer render times in exchange for a potentially
undetectable increase in quality, especially at higher resolutions.
That said, every clip‘s requirements are different. One group of settings is unlikely to
produce equal results for shots with widely different subjects and movement. You’re
encouraged to do some limited tests prior to committing yourself to a particular
group of retiming settings. As you experiment with different settings, be sure you
always compare output from the Fast settings to that from the Better or Best settings,
to make sure that it’s worth committing yourself to the more computationally
intensive Best settings.