Green Screen

Green Screen Green screening is a technique for compositing (layering) two images together. A color range in the top layer is made transparent, revealing another image behind. Also known as the chroma keying technique, it is commonly used in video production and post-production

Green Screen

Final Composite

What is Green Screen or Chroma Key effect?

If you shoot a video with a single colored background (often green or blue), Premiere allows you to make that color transparent.
You can replace the background with any other video clip, graphic or still image as you like.

What is Keying? Keying is the process of isolating a single color or brightness value to make that value transparent.

Lighting a Green Screen

- - - The color and lighting of the green screen needs to be as even as possible.
    - The key to lighting a green screen is consistency. The whole point is to create a single, consistent shade of color across the entire screen.
    - You will need at least two lights, preferably more.

Removing The Green Screen

- - - Add green screen footage to your sequence.
    - Make sure your green screen footage is on at least Video 2 or higher.
    - Place your background UNDER your green screen video.
    - Change your Workspace to Effects

Start by selecting the Effects Workspace

- - - In the Effects Panel, type the word ultra or navigate to Video Effects > Keying > Ultra Key.
    - Drag and drop the Ultra Key Effect Icon onto your video clip or Double click on the icon IF your video green screen file is highlighted.
    - In your Effects Controls Panel on the left hand side, you should now see your Ultra Key added with options to select.
    - Use the eye dropper to select the green from the background.
    - Change the setting to "Aggressive" this will help blend the subject better into the background.

- - - Scale up/down or change the position of your green screen video by going to the Effects Controls panel and expanding beside the word Motion . You should now be able to move and scale your green screen objects.

- - - Switch over to the Color Workspace and perform some BASIC Color Corrections to help blend and "sell" that your subject is in the scene.

Applying a mask to your footage

- - - Masks let you define a specific area in a clip that you want to blur, cover, highlight, apply effects, or color-correct.
    - You can create and modify different shaped masks, like an Ellipse or a Rectangle. Or, you can draw free-form Bezier shapes using the Pen tool.

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