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Greenscreen editing: outline of speaker is shimmering

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Fiona Ashe
Greenscreen editing: outline of speaker is shimmering
on Dec 13, 2012 at 10:07:08 pm

Hi,

I'm editing a clip of a person speaking to camera which was recorded against a greenscreen background. It looks great except that the outline of the speaker appears to be shimmering / moving.

Any advice, please?

Many thanks!


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Mark Suszko
Re: Greenscreen editing: outline of speaker is shimmering
on Dec 13, 2012 at 10:18:16 pm

Sounds like the keying software needs to be adjusted. Try the clip and feathering controls, as well as the tolerance settings, and if he's got green spill light bouncing off him, that can be countered somewhat with a magenta hue which comes from turning on the spill-killer plug-in.

A little trick I use sometimes on shaky keys with spill problems is to turn on the drop shadow feature, then use the color sampling tool to select the key color next to the body, to create a rim of even-shaded green or blue that can be feathered and adjusted a bit around the body.


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Fiona Ashe
Re: Greenscreen editing: outline of speaker is shimmering
on Jan 7, 2013 at 11:53:14 pm

Hi Mark, many thanks for your helpful tips. I did adjust the settings and the hairline is good now, but the jacket is still shimmering. Please see details in a comment further down this thread (I couldn't see how to reply to everyone in the thread at once).

Many thanks,
Fiona.


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jerry wise
Re: Greenscreen editing: outline of speaker is shimmering
on Dec 13, 2012 at 10:26:49 pm

was xd-cam used as the recording media.? are you recording in 4-2-0 ?
i have that problem with every green screen we do. it really shows up when the talent has fine hair and wearing a dark coat.
to get around it i bought DV Matte Pro. just drop your background into the well and you get a really good key and fine hair is preserved and there is none or very little "sizzle" around the edges. but you have to have a really good flat lit green screen.


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Fiona Ashe
Re: Greenscreen editing: outline of speaker is shimmering
on Jan 7, 2013 at 11:43:13 pm

Thanks very much, Jerry. I will consider trying DV Matte Pro if I end up doing more greenscreen, however this is a once-off, so I’ll muddle through on FCP for now.

Many thanks,
Fiona.


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