How do I cut out a moving mouth?

Dear Forum,

I'm a NEW user here on this forum so Hello!

I have both Motion 5 & FCP X.

Here is a quick summery of my problem.

I wish to take a full face video close up of me talking and cut my mouth out keeping the edge close to the lips.

I've tried vignetting a mask but my lips get lost when opening my mouth too wide.

I know there is a way of doing it as I've seen it done in a famous comedy video by Markiplier. Although I need this effect for another reason than putting my mouth on to a dog or cat the result is exactly what I'm after.



Can anyone give me a step by step guide on how to achieve this effect?

Thank You.

James

You could use a mask with keyframes to adjust along the time (which may be quite a lot of work if you need many adjustments), or you could use the SliceX plugin.

And welcome to the forum!

Thanks.

I have the plugin but struggling to find the exact resource to complete the task.

Do you have any guidance or know of any links, videos which can talk me through it?

Cheers.

to quote my replay to you rQ at at ASC:

depends on where you like to put it on.
To put a human mouth onto a human face asks just for some 'beef' around the mouth and color adjustments (and tracking, if the to-be-pasted face moives). Did that to make somebody sing - hilarious

In your example, human lips on doggy/furry head, I would use 'reverse green screen':
paint the area around your mouth green (don't let anybody see you while recording )
The color-key in FCPX/Motion is very 'forgiven', use your kids watercolor or 'clown makeup'... some light would help.

in Motion, apply a dirt-mask to exclude face, and then apply color keying.

apply motion tracking/keyframes if needed.

gets tricky when subject rotates head.. you have to mimic that while recoridng....


And Welcome, James, to fcp.co

You can get a stretchy polypro head cover (balaclava) in CK blue or green from many studio and theatrical suppliers. Much more convenient than painting Karsten's face.

Or find a dog with a big, loud human mouth. Oh, right, they don't have those. Except my white shepherd. Oh wait, that's not a human mouth. But man, lots of the day it sure sounds like one...

Head chroma key mask, mouth exposed, that's what I'd do.