iOS · iPhone & iPad
Speed Up or Slow Down Video in iMovie on iPhone or iPad
Source-checked About 10 minutes
Answer
Select a timeline clip, open Speed, drag the control toward the tortoise or hare, and preview the audio and clip duration before export.
Select the clip
Open a movie project and tap the video clip in the timeline so its inspector appears.
Open Speed
Tap the Speed button and drag toward the tortoise to slow down or the hare to speed up.
Review clip ranges and audio
Add speed ranges when only part should change and decide whether pitch preservation produces acceptable audio.
Preview and export a short test
Preview the complete changed range, then export a short sample. Check motion, transitions, duration, pitch, and speech intelligibility before sharing the complete movie.
Video walkthrough
If it does not work
- If timing or audio is damaged, reset that clip's speed or shorten the range and restore the preserved project. Do not overwrite the original video.
Sources and verification
Checked against official documentation on . Scope: iPhone & iPad.
Reviewed against the linked first-party guidance; interface labels can vary by current app, service, or operating-system version.