how to convert mp4 to mov for imovie
importing mp4 (from zoom) to imovie, the video is lost
The first thing to try is to delete preferences. Open iMovie while holding down the Option and Command keys and select to delete preferences in the box that appears. iMovie will open in a new library. Reopen your old library to get back to your
projects. Deleting preferences is a safe procedure that will not cause data loss or disruption to your project. If no luck try converting the clip as described below.
Not all Mp4 works in iMovie. It must be Mp4/AAC. AAC stands for Advanced Audio Coding.
So, instead of importing directly into iMovie import from Zoom to your desktop. Then convert your troublesome clips to H.264, Mp4/AAC with the free download, Handbrake. Do that even if the codec already is indicated to be Mp4/AAC. Re-rendering often cures issues.
You can get Handbrake here:
A simple way to do it is to open Handbrake and do a File/Open Source. Navigate to your video and choose it as the source from the resulting screen. Then do File/Start Encoding. Wait a couple of minutes for the conversion to complete. Then save and import the converted clip into iMovie.
-- Rich