Filmora - AI Video Editor
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Chroma Key

Chroma Key is used to remove specific colors from overlay images and videos. For example, if you capture a subject against a "green screen" background or cover part of the subject with green, you can use Chroma Key to remove the green.

You can then place the subject onto different virtual backgrounds and make some cool shots like creating a superhero flying through the sky.

Use Chroma Key to Make Selected Colors Transparent

Enable Chroma Key

Double-click on the clip in your timeline to open the editing panel, and check the box next to Chroma Key. You can also select the video in the timeline first and then click on the Chroma Key icon on the toolbar to automatically enable the Chroma Key feature.

Select Color

Click on the eyedropper tool to pick a color in the image or video clip you want to make transparent in the Preview window.

chroma key Remove Selected Color
Remove Selected Color
Adjust Settings

You can adjust the following settings to alter the video's borders, transparency, shadows, and much more.

  • Offset: adjusts the visibility of the backdrop
  • Tolerance: controls the width of the range of hues of the key color
  • Edge Feathering: softens the edges
  • Edge Thickness: adjusts the edges of the subject
  • Alpha Channel: turns anything keyed out appearing black and anything not keyed out appearing as white.

Creative Way to Use Chroma Key

The Chroma key makes a color range in the top layer of the clips transparent. Therefore, the background video clip or image behind the top layer could show through. This way, you can add the green screen video as an overlay to composite a PIP video.

Import Videos to Media Library

Import both your background video and green screen clip to the media library.

Drag and Place Videos to the Timeline

Drag the background clip to the video track on the timeline, and green screen footage to the track above as shown below:

place green screen pip videos in Timeline
Green Screen PiP Interface
Use Chroma Key to Remove Green Screen

Double-click the green screen clip, and then tick the Chroma Key option. By default, the green screen color will be picked and be removed automatically. You also can refine video by adjusting the offset, tolerance, edge thickness, and edge feather settings to make the background video clearer.

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use chroma key to remove green screen
Chroma Key Settings
Preview PIP and Adjust

Check the result in the Preview window and adjust its size and position if needed.

use chroma key to remove green screen
Chroma Key Settings
If you want to fine-tune how the green screen overlay blends with the background, you can adjust the settings on the Compositing tab.