How to Mask Green Screen in Premiere Pro?

To remove a green screen in Adobe Premiere Pro, you can use the Ultra Key effect. This process effectively masks the green screen and replaces it with another background. The reference "Remove Green Screen in Premiere Pro | EASY! - YouTube" demonstrates how quickly and easily this can be achieved.

Using Ultra Key in Premiere Pro

Here's a step-by-step breakdown of how to mask a green screen using Ultra Key:

Import Your Footage: Begin by importing both your green screen footage and your desired background footage into your Premiere Pro project.
Place Footage on Timeline: Drag your green screen clip onto the timeline, and place the background clip on a lower track beneath it.
Apply the Ultra Key Effect:
- Go to the "Effects" panel.
- Search for "Ultra Key".
- Drag and drop the "Ultra Key" effect onto your green screen clip.
Select Key Color:
- In the "Effect Controls" panel for the green screen clip, locate the "Ultra Key" settings.
- Use the "Key Color" eyedropper tool to click on the green color in your video preview. This will automatically remove most of the green screen.
- As demonstrated in the reference, this action alone can often provide an adequate result removing the green screen in an instant.
Adjust Settings (if needed):
- The settings in the Ultra Key panel might need adjustments for a cleaner result. These settings may include:
  - Matte Generation: Use settings like "Tolerance", "Pedestal," and "Transparency" to fine-tune the matte and remove any residual green artifacts.
  - Matte Cleanup: Adjust "Choke" and "Softness" to remove rough edges or spill.
  - Spill Suppression: Use "Spill" controls to further eliminate remaining green coloring on the subject.

Setting	Function
Key Color	Selects the specific color to remove.
Tolerance	Adjusts the range of color similar to selected to be removed.
Pedestal	Sets a minimum threshold for color removal.
Transparency	Adjusts overall transparency of the key.
Choke	Contracts or expands the edges of the matte.
Softness	Blurs the edges of the matte for a softer transition.
Spill	Suppresses color spill around the edges of the keyed subject.

Final Result: Once adjusted, your green screen should be completely removed, and your subject will be seamlessly placed onto the new background.

By using these steps and adjusting the parameters within the Ultra Key effect, you will be able to effectively mask the green screen and seamlessly combine your footage with new backgrounds.