My issues are with editing 4K video in FCPX on a MacBook Pro M1 Pro. The issue does not exist with 1080p video.
During playback in FCPX, the audio will "skip" and drop out on some frames. This usually happens after I have made a blade cut in the timeline or if I zoom in or out on the timeline. But, it can happen at any time and it is very frustrating.
This happens when editing multicam or single clip timlines.
I have tried editing 4K video on a 4K project as well as on a 1080p project, and it makes no difference.
My footage is 4K/30 10 bit from a Sony A7SIII. My timeline is 4K/24.
You can view an example on Vimeo.
vimeo.com
FYI, I have tried re-installing FCPX. I have removed all plug-ins and the problem persists. I have deleted FCPX Prefs.
THIS PROBLEM ONLY HAPPENS ON 4K VIDEO. I have not had any issues with 1080p.
During playback in FCPX, the audio will "skip" and drop out on some frames. This usually happens after I have made a blade cut in the timeline or if I zoom in or out on the timeline. But, it can happen at any time and it is very frustrating.
This happens when editing multicam or single clip timlines.
I have tried editing 4K video on a 4K project as well as on a 1080p project, and it makes no difference.
My footage is 4K/30 10 bit from a Sony A7SIII. My timeline is 4K/24.
You can view an example on Vimeo.
![vimeo.com](/proxy.php?image=https%3A%2F%2Fi.vimeocdn.com%2Ffilter%2Foverlay%3Fsrc0%3Dhttps%253A%252F%252Fi.vimeocdn.com%252Fvideo%252F1377221531-8184e47fcaa7679149d066f403b68f398652b355f78d5b4a41e5e1f2d9cbdad6-d_1280x720%26src1%3Dhttps%253A%252F%252Ff.vimeocdn.com%252Fimages_v6%252Fshare%252Fplay_icon_overlay.png&hash=c15e0c22b647a049cd80a84ec6f2bdeb&return_error=1)
Audio Skip FCPX.mp4
This clips shows how the audio is skipping, dropping out and going out of sync on a multi-cam clip, but this happens in non-multicam as well. I can reproduce at will.
FYI, I have tried re-installing FCPX. I have removed all plug-ins and the problem persists. I have deleted FCPX Prefs.
THIS PROBLEM ONLY HAPPENS ON 4K VIDEO. I have not had any issues with 1080p.