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Masked area offset from drawn mask?

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Nelson Goforth
Masked area offset from drawn mask?
on Jun 2, 2015 at 7:37:58 pm

I'm seeing something in AE (CC) that I've never run into. I'm trying to draw a mask to hide a tracking marker, but the area affected seems to be offset from the mask that I draw. Mask Feather and Mask Expansion are both set to zeroes. I tried a restart in case that helped. The offset seems to be about 12px (at least in this example).

I guess I can work with it, but it seems very odd. Anyone else run into this issue, and/or have a solution?

Thank you.
Nelson



Red Camera Rental & Indy Features, Denver Colorado.
rockymountain4k.com * 303.506.2456


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Dave LaRonde
Re: Masked area offset from drawn mask?
on Jun 2, 2015 at 11:29:25 pm

Did you mask before you did anything else in AE... like scaling?

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Nelson Goforth
Re: Masked area offset from drawn mask?
on Jun 2, 2015 at 11:56:24 pm

Bingo, Dave - thank you.

Not scaling exactly, but I did apply the Warp Stabilizer (in Position Only mode) to make my shakycam a little less shaky. I'll bet that did it.

I created a new composition from the footage to test with, and it masks as expected.

Is there any solution, or just deal with it? I guess I could go back to the original footage, I only smoothed it by about 20%. Or use a smoothing expression instead of the Warp Stabilizer...I've seen a tutorial from Mamoworld, but I was being lazy.

Thanks again,
Nelson

Red Camera Rental & Indy Features, Denver Colorado.
rockymountain4k.com * 303.506.2456


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Dave LaRonde
Re: Masked area offset from drawn mask?
on Jun 3, 2015 at 12:04:54 am

Hmmm... you muight try using rotobrush to get rid of the tracking mark. That could work... especially since you already have some sort of substitute to fill in the hole.

-- or --

You could declare the slight stabilization to be good and never again to be tweaked, prerender it, reimport into AE and mask away as you've been doing.

-- or --

A combination of prerendering, then applying Rotobrush.

Isn't it nice to have options?

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Nelson Goforth
Re: Masked area offset from drawn mask?
on Jun 3, 2015 at 12:36:07 am

Excellent advice. Will one or more. I haven't used the rotobrush really, this may be the perfect spot - I was having trouble getting close to the actor's face.

Red Camera Rental & Indy Features, Denver Colorado.
rockymountain4k.com * 303.506.2456


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