User Manual

 To switch between editing Retime Speed and Retime Frame curves: Use the Curve
pop-up at the upper left-hand corner of the Curve Editor to check or uncheck the
curves you want to be visible. Clicking on a curve within the editor makes that curve the
currently edited one.
 To close a speed curve: Clicking the Curve button at the right-hand side of the clip’s
title bar in the Timeline toggles the curve open and closed.
As far as adding, removing, and smoothing control points on speed curves and adjusting
curve segments, they work identically to any other curve in the Timeline. For more information,
see “Keyframing in the Timeline and Curve Editor” in Chapter 44, “Keyframing Effects in the
Edit Page.”
Speed Effect Processing
Once you’ve retimed a clip, you have the additional ability to change how the retimed clip is
processed in order to improve its visual playback quality, especially in the case of clips that are
slowed down. There are two ways you can set this. First, there’s a project-wide setting available
in the Master Settings of the Project Settings. Secondly, you can change how clips are retimed
via a per-clip setting available in the Inspector.
To change the Retime Process setting of an entire project:
1 Open the Project Settings and click to open the Master Settings panel.
2 Choose an option from the Frame Interpolation group Retime Process pop-up menu.
To change an individual clip’s Retime Process setting:
Select a clip, then open the Inspector and choose an option from the Retime Process
pop-up in the Retime and Scaling group. If you choose Optical Flow, you can also
choose an option from the Motion Estimation pop-up.
Here are the different options you have for processing speed effects:
 Retime Process: Lets you choose a default method of processing clips in mixed frame
rate timelines and those with speed effects (fast forward or slow motion) applied to
them, on a clip-by-clip basis. The default setting is “Project Settings,” so all speed
effected clips are treated the same way. There are three options: Nearest, Frame
Blend, and Optical Flow, which are explained in more detail in the Frame Interpolation
section of Chapter 3, “System and User Preferences.”
–
Nearest: The most processor efficient and least sophisticated method of processing;
frames are either dropped for fast motion, or duplicated for slow motion.
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Frame Blend: Also processor efficient, but can produce smoother results; adjacent
duplicated frames are dissolved together to smooth out slow or fast motion effects.
This option can provide better results when Optical Flow displays unwanted artifacts.
–
Optical Flow: The most processor intensive but highest quality method of speed
effect processing. Using motion estimation, new frames are generated from the
original source frames to create slow or fast motion effects. The result can be
exceptionally smooth when motion in a clip is linear. However, two moving elements
crossing in different directions or unpredictable camera movement can cause
unwanted artifacts.
Chapter – 42 Speed Effects 844