Chroma keying or Green Screen is a post-production technique to composite (layer) images to create the illusion of the foreground subjectbeing located within the background image.
Premiere Pro Alpha view?
Under the ultra key choose the alpha channel drop-down option. Used to see how effective your key is.
After effects Alpha view?
Apply key light effect then in effect controls use screen colour and use the eye dropper. Click on the final result and choose the screen matte this is where the alpha view is.
Ultra key effect PP?
Ultra key effect is a video editing technique used to remove or replace a specific colour or background in a video. We use this first to find the green screen colour
How does a mask help green screen?
When a green screen doesn't fill the frame. It's okay if the subject is still fully in frame. Masks help minimize the work the computer has to do. It also protects against problems in a small part of the frame.
How to refine the key?
Adding masks and tracking them.
Matte generation (PP)
-transparency
-Highlights
-shadow
-Tolerance
-pedestal
Matte cleanup (PP)
-choke
-soften
-contrast
-Midpoint
Spill suppression (PP)
-destraunt
-range
-spill
-Luma
How to refine the key AE?
Add masks and track them
The triangle next to the screen matte increase clip black until the background is solid black. Decrease clip white until the subject is completely white
