As I work on combining videos. I must delete the old as I save the new as I go and continue because modern Macs have no real memory storge anymore. Now many of the new saved parts no longer have sound in section when reloaded. The sections had sound before. The sound keeps disappearing on sections when I reopen the combined videos. All were saved as iMovie. Very frustrating.
MacBook Air 13″, macOS 12.6
Try deleting preferences and see if that solves it. To delete preferences open iMovie while holding down the Option and Command keys and select to delete preferences in the box that appears. iMovie usually will open in a new empty library. If so, reopen your old library to get back to your projects. Possibly you may need to reboot to set the changes. Now see if that cures the sound problem. Deleting preferences is a safe procedure that will not cause data loss or disruption to your project.
Also, placing your media into a different, newly created, project might solve the problem.
-- Rich
Try deleting preferences and see if that solves it. To delete preferences open iMovie while holding down the Option and Command keys and select to delete preferences in the box that appears. iMovie usually will open in a new empty library. If so, reopen your old library to get back to your projects. Possibly you may need to reboot to set the changes. Now see if that cures the sound problem. Deleting preferences is a safe procedure that will not cause data loss or disruption to your project.
Also, placing your media into a different, newly created, project might solve the problem.
-- Rich
I think that what is happening here is that the .mov files you are using contain a codec that is not compatible with iMovie. iMovie is more sensitive than QuickTimePlayer or the Finder to slight variations in formats. The .mov file format is particularly problematic because .mov is a bucket that contains a variety of codecs. .Mov files can differ from one another in the codecs that they contain. Not even all Mp4 files are compatible with iMovie. It must be Mp4/AAC, where AAC stands for Advanced Audio Coding. I suspect that the problem is with the audio codec.
So, what you need to do is to convert the .mov files, and even the Mp4 files that you "saved", by re-rendering them to Mp4/AAC. The files must be re-rendered, not just saved. Start with one of your .mov files and see what happens.
You can use the free download, Handbrake, to convert the files. Handbrake will convert them to Mp4/AAC by default. Doing that procedure often cures sound 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. (Click on Desktop in the sidebar to have the screen display the files on your desktop.) 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
Yeah so I reloaded videos. When loaded to the IMovie Ap no sound on some. Very frustrating for sure. These are .mov items. They play fine on Quick Time player but when loaded to Movie the sound disappears on some. Also some with sound I save as MP4 videos. I go to play them and no sound in parts. This must be a common issue. I tried what you said and even reloaded the program but no change in the issues.
Unfortunately I ran out of memory. So I deleted everything and started again. I have deleted the ap also and reloaded it. Hopefully this time I will get it done. These are joining videos to make a movie. For example one year of videos. More fun and easier to watch when all joined. Sad part is I lost a few weeks work. Good part is I saved all the small videos on a separate hard drive. Not enough room on normal iCloud. Again if, you do this kind of fun stuff you need memory for sure. Very disappointed how Apple changed years back from very good memory (which made thinks easier) to iCloud storage.
IMovie sound disappearing
