Audio not importing with videos I import
I recently had some old VHS tapes digitized and am building a collection within iMovie. I was presented with ~24 individual *.mp4 files from the company that did the digitizing. All the files are the same file type and of similar size. For some reason, I can easily import them into iMovie, however some of the files come in with audio and some without. I can play all of the movies within QuickTime with no problem. I'm so frustrated after spending hours trying to figure this out. Any help would be much appreciated!!!
Thanks,
iMac 27″, macOS 10.15