help with a noisey key

[Michael Szalapski]

Security reasons where I work prohibit me from downloading your file from rapidshare, but I can link you to some useful stuff on getting better keylight keys.
Great info here and here. You might also consider using this method on all your keys.

– The Great Szalam
(The ‘Great’ stands for ‘Not So Great, in fact, Extremely Humble’)

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.

[Jonas Espinoza]

thanks dave, but the thing is i still get the horrible noise in the blacks on the movie i output for this troubleshoot, which was quicktime PNG transcoded from the HDV sources (i know, not ideal. i got brought in to amimate some stuff around it. the keying, the client assumed, would be the easy part)

[Jonas Espinoza]

thanks for the links, its good stuff, but most of it i know already

it keys ok on all the other interviews shot with the same camera on the same green screen.

somehow, the dark gray sweatshirt this guy is wearing is super noisey after applying the key.

would anyone have a second to have a look? thanks

[Joey Foreman]

You’ll get the best results by combining a core matte and an edge matte, and using that as a luma track matte for the original footage. With the core matte filled completely, you’ll be left with the original shirt underneath, so there can’t possibly be more noise than on the unmatted footage.
There are step-by-step instructions for how to do this here:

https://forums.creativecow.net/readpost/2/974490

If the original footage has the noise, you can use the same track matte in combo with an adjustment later to which Remove Grain has been applied. If the talent moves a lot you may have to rotoscope some masks on the the non-grainy areas to prevent the loss of too much detail.

If the noise is predominant at the edges, you can add some pre-blur in keylight on the edge matte.