Audio & video are slightly out of sync within one multicam angle. Solution?

After syncing clips and doing a bit of multicam editing, I discovered that the audio and video are slightly out of sync within one of the angles. (As in, there was an issue when the clip was recorded or rendered. Not a multicam sync issue.) In any other project I would just detach the audio, nudge so it's in sync with the video, create a compound clip with the two, and move on... but I haven't found a way to detach audio from a single multicam angle. I realize that will create some sync issues within the multicam project, but I would rather fix those than start from square one. Is there a way?

Welcome to the forums!

Someone may come up with a better solution, but this is what comes to my mind straight away:

1. In the browser, select the original clip that has sync issues and go Clip>Open Clip. This will open the clip in its own timeline.

2. Sync the audio to the video by nudging the audio to the correct position.

3. Select the multicam clip in the browser and double-click to open the multicam clip in the Angle Editor.

4. Replace the problematic angle in the multicam editor by dragging the synced original clip from the browser onto it.

I just tried this myself, it should work.

- Ronny

Thank you for the warm welcome and — of course — for the answer. Worked perfectly!
Can't believe that I had no idea that menu option existed all these years...

You are very welcome!

Open Clip is extremely useful to make changes or even apply effects to an original clip before bringing it onto a timeline.

Being able to add or replace an angle in the Angle Editor even after the multicam has been edited is one of the gems of the multicam feature in Final Cut Pro. 

- Ronny

Try using Plural Eyes 4

There is no need to pay for an external application if you can do it perfectly within your NLE. And Pluraleyes is far from prefect, just google Pluraleyes issues.

- Ronny