Use a video converter like MacX Video Converter Pro (you can get it here). You’d better convert the video clips to a format that iMovie likes, such as MOV or MP4. Mixed video formats can result in corrupted output and therefore the rendering error 10008, 10004, 50. The clips you import into iMovie may be recorded by different cameras and in different formats, such as MP4, MKV, HEVC, AVCHD, AVI, etc. The good news is that it’s easy to identify why they occur and fix them.

There are similar error messages like Video Rendering Error: -50, -1004, etc. The 'Video rendering error: 10008 (iMovie error 10008: renderVideoFrame failed)' is another common error message when iMovie won’t export movie to MP4, 4K, 1080P, or other options. iMovie failed to export edits rendering error 10008

Then copy back the Compressor folder into the iMovie application package.Ģ.If iMovie is still not saving movies, quit iMovie. Restart iMovie and try to export a project.Move the Compressor folder from Contents/Plugins/ into another folder.Open the application folder and right-click on iMovie to open the application package.

Exporting from imovie