Tips: If the iMovie video can’t be imported to a video converter, showing an invalid source, it indicates that the file is fatally corrupted. Go to the General Profiles > select to encode to Mp4 with H.264.

Once the video is loaded, a screen will pop up to let you select the output format.

It accepts all iMovie exported files in 4K, 1080P, 720P, etc. Then open the app and click the 'Add Video' button to load the iMovie video. If you try to open the MP4 file, it will say the iMovie file is incompatible with QuickTime. And the final MP4 movie may come with a file size of zero bytes before the rendering completes. After you export the iMovie project, its name will show in Finder immediately. Are there any temporary files next to your final movie? Temporary files mean that your movie is still in the rendering process. Check if there are temporary filesĬheck the final video and make sure the iMovie export is complete. Export the movie with the Best quality 2. Tips: If the MOV file is too big for you, you can re-encode it into a smaller MP4 using Handbrake or other free video converters. Note that the file size of the MOV file will be larger than MP4, but the quality will also be better. Then you should be able to open the iMovie MOV file in QuickTime Player without problems. That will save your iMovie project in MOV instead of MP4 (exports at all other quality settings will generate a smaller. When you export the movie from iMovie, select Best (ProRes) under Quality in the share dialogue box.

If the iMovie MP4 output is not compatible with QuickTime Player, you can save your movie project in another format. What to do when iMovie file is not compatible with QuickTime?

How to save imovie as mp4 on mac