The Chroma Key effect allows you to remove a specific color from your video, effectively making it transparent. This is commonly used in video editing to replace backgrounds.
How it works
Chroma Key works by comparing each pixel’s color to a specified key color. If the pixel color is close enough to the key color, it becomes transparent. Additional controls allow you to fine-tune the effect for better results.
Use cases
Chroma Key is particularly effective for:
- Replacing solidly-colored parts of images with different backgrounds
- Overlaying subjects onto different scenes
- Creating special effects or overlays
Controllers
| Name | Type | Description | Range |
|---|---|---|---|
| Key color | Color | The color to make transparent | - |
| Color cutoff | Number | The threshold for how close a color must be to the key color | 0-1 |
| Color feathering | Number | The smoothness of the transition from transparent to opaque | 0-1 |
| Despill amount | Number | The amount of green or blue spill to remove from the subject | 0-1 |
| Despill luminance add | Number | The amount of luminance to add to the despilled areas | 0-1 |
Despill tinting
The despill parameter allows you to remove any glowing or “spillage” of the green in your image. As a consequence of that, however, your source layer might become tinted the opposite color of the key color. You can remedy that by applying the Color correction effect.