Video compositing

Replace a green screen video

Add a source video or image and a replacement video to create a perspective-matched composited video.

Source video

Source image

Replacement video

Custom key hex

Keyer and Composite

Live
Source video
Source image
Replacement video
Custom key hex
View
Key color
Tolerance
Despill
Scale
Position X
Position Y
Fit mode

Runs in your browser. Your files are never uploaded.

How tools work

Missing a step? Describe the tool you need and Fuser builds it. It runs live, so every change shows as you make it, and its result goes wherever your work goes next.

1. Describe what’s missing

Say what goes in, what comes out and which controls you want. If a look is easier to show than to explain, wire in a reference.

2. Watch it come alive

Fuser designs the controls, writes the tool and tests it. Live tools run in your browser, so the result changes while you drag.

3. Keep it. Run it on anything.

Every tool is saved to your library. Wire its result into a model, a recipe or another tool, on images, video, audio or text.

Ways to use this tool

Use the node wherever you need to replace a keyed color area while keeping the source foreground visible.

Replace a green-screen background

01

Composite a replacement video behind the non-green foreground in a source video.

Match a moving screen

02

Warp the replacement video into the detected green region so it follows the region’s perspective.

Create a keyed video preview

03

Switch the view to final, matte, key, or points to inspect different stages of the result.

Work from a still source

04

Use a source image with a replacement video when the keyed scene is a single frame.

Tune difficult color keys

05

Choose green, blue, black, white, or a custom key color and adjust tolerance for the source footage.

Refine the composite placement

06

Adjust scale, horizontal position, vertical position, and fit mode to change how the replacement fills the keyed area.

Frequently asked questions

You can provide a source video or source image and a replacement video. The result is a composited video.

Use a source with a distinct colored area that can be keyed, such as green, blue, black, or white. For another color, choose Custom and provide its HEX value.

Key color and tolerance control the color selection, while despill adjusts the treatment of color spill. Scale, Position X, Position Y, and Fit mode change the replacement’s size, placement, and filling behavior.

Final shows the composited result. Matte, key, and points provide alternate visual views for inspecting the key and detected perspective points.

No account is needed to try the tool on this page, and it is free. Downloading more than once or opening it in Fuser asks you to sign up.

Open the tool in Fuser and connect its video result with other nodes. This lets you use the composite as one step in a broader node workflow.

Open it in Fuser

Try the live video result in your browser, then combine this compositing node with other Fuser nodes.

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