Resolution Question

mjroddy wrote on 2/17/2004, 10:30 AM
I'm having a really tough time keying a DV source. I mean, the key is swell, but I'm getting serious stairstepping on the face and brighter areas. Using Boris, I can choke that away, but obviously, I'm cutting away a significant part of the image/spokesperson.
This was shot uisng a JVC GY DV-500.
My question is this: If I shot on a BetaSP camera and dubbed the resulting video to my Sony DSR45 (DVCam), am I back to where I started? Or will using component out (from a UVW1800) to the 45 give me better/more keyable results?
I've done pretty serious searches on keying for DV, but the only "tricks" that I came away with are to make sure the bkg is evenly lit and to use an amber backlight. Are there any other concepts that would make keying a person more doable in DV, or are the limitations of this format just too extreme.
The final result will have to be full NTSC, not web delivery.
Thanks for any and all advice, ideas and comments.

Comments

corug7 wrote on 2/17/2004, 12:13 PM
John Jackman has an excellent article on the subject on the www.dv.com website. Check the DV Magazine archives.
farss wrote on 2/17/2004, 1:45 PM
If the key is fine I can see no advantage and lots of disadvantage to going to SP. If I understand what you are saying the stairstepping isn't related to the key at all, right?
mjroddy wrote on 2/17/2004, 4:36 PM
corug7, I'm on it. Thanks for the heads up.
farss, You are correct. The key is fine. It's the stair-stepping that's killing me. I just didn't know where the stepdown took place, in the camera on accuisition, in the computer on digitizing, or if it's just the nature of the beast.
I know i've had really good keys from my BetaSP system, but this DV is murdering quality (of a key).
TVCmike wrote on 2/17/2004, 11:03 PM
I've seen someone suggest applying a Gaussian blur of 0.005. Apparently, this got rid of the problem for the individual. Not my suggestion, just parroting what I've seen on here.