Magic Mask and Smooth Cut Together

I have a smooth cut in my timeline (I cut out an ugly audio flub in an interview) and now I want to use a magic mask on the same interview clip. I think I understand why magic mask doesn't automatically work on the frames that will be generated/interpolated by the smooth cut. But what would be the best workflow to use these two features together?

My clips are all ProRes 422 UHD. Should I separately export the interview clips with the smooth cut in ProRes 422 UHD, then import the rendered clips back into my timeline, and then put the magic mask on them?

Is there a better way to do this?

Could you take the two source clips and smoothcut transition and turn them into a compound clip and apply magic mask to the compound clip? I’ve never tried this.

Update:

I just gave it a try with in a compound clip and the magic mask seemed to work fine. Note that a compound clip bakes-in the resolution of the clip based on the timeline resolution, not the source resolution. There are other gotchas with compound clips so read up on them if you aren't familiar.

Otherwise, your approach will also work.

Yes, that works! So the order is:

Put clip into timeline and cut out the flubbed line
Use a Smooth Cut to hide the cut
Create a Compound Clip
Apply color correction and Magic Mask to compound clip

And now the smooth cut frames are included. In this case my timeline and source clip resolutions are the same (UHD 30 fps) but I'll keep your point in mind.

Can you recommend some good documentation on compound clips? I'll start hunting around myself in the meantime.

Hmm. My previous reply seems to have vanished.

Thanks for the suggestion. I tried it and it seems to work fine. I'll read up on the limitations of compound clips. Got any suggested documentation? In my case, source clip and timeline resolution are the same -- UHD 30 fps.

I read some limitations in the reference manual. It's 4000+ pages long so not an easy read but comments about compound clips should be easy to search for. I would suggest simply testing your desired workflow from edit through grading and then do a test delivery to whatever formats you want to use just to ensure that the whole workflow pipeline works for you. Do this on a sample of your media before investing days of editing only to find that there is some glitch that prevents some other step in the workflow.

Thanks again

actually, I noticed, that the better route is to render the compound clip out before applying the mask.

actually, I noticed, that the better route is to render the compound clip out before applying the mask.

Could be. Why do you say it's better?