Keying: Black line around subject

[Sam Moulton]

yes, it’s probably coming from the detail setting on the camera. too much sharpening. It’s a pain to deal with.

[Danny Princz]

i had this same issue recently when i received footage where the in camera enhancement was set too high…. what a nightmare

who is that masked man…

[S. Marcotte]

Any ideas? How should I tackle this?

[Chris Forrester]

I`ve not seen this before but I think I understand what it may look like seeing someone mentioned the sharpen feature. When you crank up say unsharp mask you get heavy contrast on the image often when pushed really dark/light areas together.

How about using your key and offsetting a copy of it in the direction of where the black outline is and using it as an alpha matte so your left with a thin strip that would follow where the black area is left on the original key (im assuming it follows around the image similar to a really thin dropshadow effect would look like). You could then use this matte to treat/erode, soften the original key and just the area that is causing you the most grief.

Just a thought like I say ive not encounted this before.

[Darby Edelen]

I don’t have a definitive workflow for you, but I would say that your solution will involve pulling a matte from a modified source and then applying that matte to your original source.

I’ve heard that converting an image to YUV, blurring the “blue” and “green” channels and converting back to RGB can help in some situations.

[Danny Princz]

this was recently mentioned, and is not intuitive nor inexpensive, but ultimattes advantage plugin is what i used in this situation and has builtin tools that do exactly what you want.

every footage is different so it might ot work for you, but id try the demo and play with the DV correction settings.

if not you can try offsetting one side of your key and combining that with the original

who is that masked man…

[Mike Procunier]

I’d do it as two separate layers with vertical masks, one for the left side one for the right. Apply normal key settings to the side without the black… adjust mask shrink on the side with the black. You have to do some tweaking of the masks and feather so you don’t see a seam.

[S. Marcotte]

I’m taking all this down.

I’m also looking into a Sapphire plug-in that blurs edges. I might be able to get something subtle but effective out of it. The difficulty I’m having with it is that it blurs darker, not lighter. The black line is smearing. I wish I could get the guy’s yellow shirt to smear instead.