Apple Final Cut Pro X (10.0.9) - Manual (Page 292)

Chapter 11 Advanced editing 292
Smooth out a slow-motion clip with video quality presets
To smooth out the apparent motion of a clip playing back in slow motion, you can apply frame
blending or optical flow analysis to the retimed clip.
1 In the Timeline, select a range, a whole clip, or a group of clips whose video quality you want
to change.
2 Choose a Video Quality setting from the Retime pop-up menu in the toolbar.
•
Normal: The default setting. Frames are duplicated, and no frame blending is applied to the
slow-motion clip. No rendering is required.
•
Frame Blending: Adds in-between frames by blending individual pixels of neighboring frames.
Slow-motion clips created with Frame Blending appear to play back more smoothly than
those created with the Normal (duplication) setting. Rendering is required.
•
Optical Flow: Adds in-between frames using an optical flow algorithm, which analyzes the clip
to determine the directional movement of pixels and then draws portions of the new frames
based on the optical flow analysis. Only the portion of the clip used in the project (the media
between the clip start and end points) is analyzed. Rendering is required.
Note: The more motion contained in a clip, the longer the analysis and rendering takes.
Reverse or rewind clips
In addition to changing the speed of a clip, you can also add directional effects:
•
Reverse: Reverses the order of frames in the clip, so that the last frame plays first.
•
Rewind: Appends a duplicate of the range selection or clip as a segment, rewinds the
duplicated segment at 1x, 2x, or 4x speed, and then plays the original clip segment again in
forward motion at normal speed.
Reverse a clip
1 In the Timeline, select a clip or a group of clips whose contents you want to reverse.
2 Choose Reverse Clip from the Retime pop-up menu in the toolbar.
The green bar with arrows pointing to the left above the selection in the Timeline indicates that
the clip is reversed.