Keying Greenscreen on DV, Oh the pain!!

[sinistar]

Usually footage works better if its DV. It's more crisp and better rez. The reason for the "blocky" outline or the orange glow could be because of what your actor is wearing. There could be color mixture between the green screen and the outfit the actor is wearing. So, if you remove the blue screen, there will be some blues (different shades because of the mix) left behind. That's why you should never wear white in a greenscreen. Or bue for that matter, otherwise your actor will dissappear... BWAHAHA HAHaha haha hehehe hee...

In order to get rid of that, simply use "Edge Feather" in the "Color Key" effect, and play around with "Color Toleration"and "Edge Thin"

Good luck!!!!

[Tuqui-tuqui]

Usually footage works better if its DV. It's more crisp and better rez. The reason for the "blocky" outline or the orange glow could be because of what your actor is wearing. There could be color mixture between the green screen and the outfit the actor is wearing. So, if you remove the blue screen, there will be some blues (different shades because of the mix) left behind. That's why you should never wear white in a greenscreen. Or bue for that matter, otherwise your actor will dissappear... BWAHAHA HAHaha haha hehehe hee...

In order to get rid of that, simply use "Edge Feather" in the "Color Key" effect, and play around with "Color Toleration"and "Edge Thin"

Good luck!!!!

:annoyed: SINISTAR DID NOT LOG OUT!!!!!!! I USED HIS ACCOUNT TO ANSWER!!!!!!!! :cry:

[TimP]

Thanxs

My actors are wearing dark cloths, do you still think it could be colour bleeding?

As for the edges im really looking for crisp stuff, feathering produces a soft edge. or even makes it slightly transparent.

Any more ideas?

Cheers
TimP

[TimP]

Hahhahaha Cheers dude.

[fig]

tim, you might check out the composite toolkit (http://www.dvgarage.com/market/product/product.php?prod=ctk) and/or the dvmatte plug-in from DVgarage (http://www.dvgarage.com/), might assist you in creating your mattes and pulling a good key. if you register and go in their lab/tutorial section they've got some quicktime tutorials that might also help, showing how they create garbage mattes and tweak those, etc. hope that helps.

chris

[TimP]

Thats a great!

Cheers for the help im going to get back to those painful shots now!!!

[sinistar]

haha Tuiqui,..I couldn't of said it any more eloquently myself :D

[beaker]

The reason for getting the blockyness is because of DV's 4:1:1 sampling instead of the normal 4:2:2 that beta/vhs/D1, etc... uses.

Here are a couple tutorials on getting a good key from blue/green screen footage with DV:
http://www.creativecow.net/articles/spottedeagle_douglas/chromakeying_411/
http://www.greatdv.com/post/bluescreendv1.htm
http://www.neopics.com/bluescreen/

[xzevlin]

I just did alot of shots (about 12 separate sequences that ran a total of about 20 minutes) on a miniDV feature film using Ultimatte Advantedge, and it did a great job. It has alot of tools to deal specifically with dv footage. It's pricey, but I compared it to the tools in alot of compositing apps, and it came out on top, especially when dealing with hair. It didn't do a perfect job with every shot, but it was fast and gave good results

zMatte also does a pretty good job on keying (and it's alot cheaper than Advantedge), though it left alot of spill on the actors that would've taken alot of time to deal with.

[digital_red]

hey beaker thanks for those links.:thumbsup:

I rember a tutorial in computerarts or 3d world about keying using the standerd version of AFX. Basically you copy the layer twice. Name them red and green and use shift channels and levels to push out all the colour. Then multiply them over each other and use them as a luma mat on the original footage. I dig the tut out tomorrow and give a better explanation. Need sleep now.

[digital_red]

TimP:

could you post a still pic I could try this out on?

[dmeyer]

I've been hearing great things about dvGarage's dvMatte plugin too. Check it out:

www.dvgarage.com

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.