Audio not matching up with lips
I noticed after a big update 2 weeks ago that when editing on iMovie, the audio wasn't matching the lips on the videos that I imported. I have never had this problem before. I cleared iMovie preferences and this worked for about 10 days. Now it's doing it again. I have cleared preferences and restarted my computer but nothing seems to be helping. I saw that you can clap at the start and end of your video to help align the sound but I didn't do that in the video and the video can't be re-done.
Any advice? Like I said, this has never been a problem before. I didn't change the settings on the device that I took the video on, I didn't take video from a new device, nothing like that.