Apple Final Cut Pro X (10.0.9) - Manual (Page 288)

Chapter 11 Advanced editing 288
Change clip speed
In Final Cut Pro you can make both constant and variable speed changes to your clips while
preserving the audio’s pitch.
Note: Speed settings are applied to the specific instance of the selected clip only. They are not
applied to that clip’s source media file on disk. To create a media file with the applied speed
effects, export the clip as a QuickTime movie. For more information, see
Share projects, clips, and
ranges on page 378.
Apply a constant speed change
Applying a constant speed change to a range selection or a whole clip alters the entire
selection’s playback speed by the same percentage. For example, applying a speed setting of 25
percent to the selection makes the entire selection play in slow motion.
Constant speed changes also alter the duration of a clip. If a constant speed change causes the
duration of a clip in your project to become longer or shorter, all clips coming after it ripple
forward or backward. If you change the speed to 50 percent, your clip is twice as long; if you
change the speed to 200 percent, the clip is half as long. For example, if you set a 5-second
clip to play back at 50 percent speed, Final Cut Pro adds frames to the clip so that the clip
becomes 10 seconds long and plays back more slowly. If you increase the clip’s speed to 200
percent, Final Cut Pro removes frames and makes the clip 5 seconds long, and it plays back
considerably faster.
Same clip with speed
changed to 50 percent
(now 10 seconds long)
5-second clip