-
Help with green screen keying
So I’ve been given some footage from a shoot that needs to be keyed out, but the only problem is that the woman wore a green shirt! I did my best to key it out with my limited knowledge of keylight and while the results are decent, they aren’t at the level they need to be.
I’ve got a sample 13 seconds of footage to download (only 50mb), and I was hoping someone could download this footage and take a stab at keying it out. If the results are good, I would really appreciate the exact settings you used and any effects/presets applied.
Thanks a lot!
Here’s the footage to download:
-
6 Replies
-
I Saw The clip and Wow! a hard one… I can only imagine playing with the screen gain, clip black, clip white, etc… but remember keylight is very powerfull and when you select the color it keys almost every shade of green, maby try using also Color KEY to se what happens, (i dont have AE installd in this pc so i cant do it right now) I personally think that the best would be re-shooting :S if people wears green using a blue screen… and remember always telling people to bring clothes in other colors rather than green.
I’ll try to do it, if I come out with something I make you know!
-
She’s not moving much, so if all else fails, rotoscope.
Color Grading presets for After Effects, Premiere, etc., plus free presets and more.
LITTLE BLACK BIRD – PROFESSIONAL VISUAL EFFECTS
https://www.littleblackbird.com
-
I haven´t seen your footage, but perhaps this tutorial on creating super tight junk mattes can help? It shows you how to create a mask around the edge of your character. Maybe this is a faster way than rotoscoping?
https://library.creativecow.net/articles/rabinowitz_aharon/junk_mattes.php
-
It looks fine on my PC. It could be due to the fact that it is an avi and that’s why it looks bad on your mac, I don’t know.
Anyway, I wasn’t at the shoot, so I had no control over the look of the shot and what compression they used to export this sample. And it was shot on a DVX100.
And thanks for all of these suggestions, I’ll definitely listen to this podcast too.
-
Try a color range key, gradually adding more of the background color to the key. You’ll probably need to use simple choker to clean up the last traces (around the edges). Being DV, it might help to give the blue channel a little blur, before keying.
-
It’s unlikely that you’ll get a great key out of this. Here are some suggestions:
Use garbage mattes, this could turn into roto work where the shirt and other blurry areas just blend right into the background.
Increase contrast.
Apply a median filter at about a setting of 1 (be careful with this, you’ll lose edge detail, although it’s pretty vague to begin with).
Pull the key.
Use the key as a track matte for the source footage.
Grant Swanson
Visual Effects Supervisor
Video Apex – Minneapolis, MN
videoapex.blogspot.com
Reply to this Discussion! Login or Sign Up