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How to Speed Up and Slow Down Video Clips in iMovie 09/11

There are many reasons why you want to speed up and slow down video clips, for example, you may want to make a video and do chipmunk voices and low voices by speeding up or slowing down the videos to achieve a better video result.

Speeding up videos and slowing down videos are very common in movie making. If you want to speed up videos in iMovie or slow down videos in iMovie and don't know how, then you have come to the right place. This article focuses on how to speed up or slow down videos in iMovie. Just check it out!

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How to speed up or slow down videos in iMovie

Step 1. Import videos to iMovie and drag video clips to Project

Go to File > Import to import movies from your hard drive, or go to Import from Camera to add video files from your connected cameras.

speed up video in iMovie

According to Apple website, iMovie supports the following video formats:
DV
DV Widescreen
HDV 1080i (25 and 30 fps)
HDV 720p (25 and 30 fps)
MPEG 4 Simple Profile
iSight

If your videos are not listed above, then you should convert your videos to iMovie compatible videos. You can use a Video Converter for Mac to make it.

After importing videos to iMovie, drag video clips from the Event browser to the Project. (To start a new project, you can go to File > New Project.)

Step 2. Speed up or slow down iMovie video clips

Double click the video clip in the Project Browser to bring out the inspector window. If the video is not converted, choose "Convert Entire Clip" and the below window shows up.

slow down videos in iMovie

You can drag the Speed slider to the left to make the clip play slower, or to the right to make it play faster. You can also set the exact percentage of clip speeding up or slowing down by typing in the percentage. "Reverse" is to make the video play backward.

Well, that's how to speed up or slow down videos in iMovie. If you want to make your video much better, you can add photos to iMovie, add transitions to video clips, add subtitles to iMovie, etc.

How to speed up or slow down videos using iMovie alternative

Next, drag videos from the User's Album to the video track on the Timeline, and then double-click the added video to open video editing panel. Locate the To speed up and slow down videos, you can also use another iMovie alternative- Video Editor for Mac. Now we’ll see how to use it.

Download Mac Version

Directly drag-n-drop to add your video file. Then double click added video to open video editing panel. Find the “Speed” option, and the speed numbers will indicate how fast or slow the motion effects will be. Adjust to the speed you want. Then preview it in the preview window. If satisfied, hit “Export” and choose to save your file to local disk, mobile devices, upload to YouTube or burn to DVD.

speed up video in iMovie

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