How to add a border to a green screen subject?

Is there a way using the filters inside FCP to add a border to a subject that has been green screened?

For example, I would like there to be a 10 pixel border of white around the edge of my subject that moves with my subject.

Thanks in advance,

Chris

There are a couple of effects in FCP. One adds a colored edge; the other is called frame I think that has fancy edging.

Chris, I guess what you are referring as an outline is similar to the stroke function in PS.

It needs to act after the keyer in the plugin process.
As it isn't a built in effect with FCPX you could double up your foreground elements adjust the fills etc and play around with matte tools to grow the foreground fill.

However a slightly noisy key edge will start to 'sing' quite noticeably when you push the size of the outline too far.

YYMV.

Sorry I misunderstood. There are free multipoint mask effects for FCP. Look in the free effects section on this web site.

Duncan Craig wrote: I guess what you are referring as an outline is similar to the stroke function in PS.

This is exactly what I'm looking for. A nice "edge" effect.

I used to have this filter in FCP 7 as part of the GenArts Sapphire Effects Package, but it's not available for FCP X.

I tried duplicating the keyed layer, placing it below, expanding it, and coloring it, but it doesn't work/look right.

Oh well, maybe someone will come out with a filter or maybe it can be done in motion.

Does anyone know if motion has this sort of an edge effect?

Duplicate your keyed layer. On the underlying copy, use the Aura filter followed by the Hue/Sat filter. Adjust the Aura filter to get a border (make sure to set brightness to 100) and the Hue/Sat to make it white (Saturation = -1 and Value = 2). Depending on your source material you can get a decent white border. It works in FCP X and in Motion.

Thanks for the suggestion.

That works pretty well - I just wish the edge was crisper and it's a bit soft - but it is definitely good enough.

Thanks again,

Chris

Just tried something else. Outer Glow in Motion. Much better.

anickt wrote: Just tried something else. Outer Glow in Motion. Much better.

That's cool. Do you think I could set this up as a custom effect (from motion) and then just apply to clips?

Might be worth a try. Just create an FCP X effect and publish all the parameters. Would be useful if you will be using that effect a lot.

anickt wrote: Might be worth a try. Just create an FCP X effect and publish all the parameters. Would be useful if you will be using that effect a lot.

I made it an effect and it works great. Thanks again for the suggestion.