How to Make Movies Slow-Motion in iMovie


iMovie is the default video editing program that comes installed with Mac OS X operating systems. It allows you to edit home or professional videos to share with family and friends. Using iMovie, you can decrease the speed of certain video frames and create a slow motion effect. Whether you want to slow down one clip or several, adding slow motion effects to your video project is a simple process that may enhance your project's overall look.

  • Open your iMovie project.

  • Double-click the video clip you want to slow down. If you want to slow down more clips, select more than one video clip or a frame range, then double-click the selection. The "Clip inspector" will launch.

  • Drag the "Speed" slider to the left to decrease the speed and make the clip slow motion. If you want to decrease the speed by percentage, select the percentage by which you want to decrease the speed. If you want to decrease the speed by setting the clip's duration in seconds, enter the values you want to decrease the speed by in the open fields.

  • Click the "Convert Entire Clip" option if you shot video with an iPhone or Flip camcorder. The "Speed" slider may not show up for videos shot with these devices. Follow the guided prompts to convert your clip. When the process completes, the "Speed" slider will show up. Drag the slider to the left to decrease your video's speed.

Tips & Warnings

  • Alternatively, select your video clips, click "Clip," then click "Slow Motion." Select the percentage you want to decrease your video's speed by. You can choose from 50 percent, 25 percent or 10 percent.

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