ComfyUI-GreenscreenKey

Chroma key custom node for ComfyUI greenscreen / VFX workflows.

Node

Greenscreen Key Mask — green/blue screen matte with adjustable threshold and softness.

Interactive Key Preview dialog: seek a reference frame, tune tolerance and edge softness with live Source / Matte / Composite views, then Apply before queueing the workflow.

Install

cd ComfyUI\custom_nodes
git clone https://github.com/alpaolo/ComfyUI-GreenscreenKey.git
pip install -r ComfyUI-GreenscreenKey\requirements.txt

Restart ComfyUI.

Usage

1. Wire video frames into Greenscreen Key Mask (e.g. VHS Load Video → node).
2. Click Key Preview… on the node.
3. Seek a frame, adjust Tolerance and Edge Softness, switch Source / Matte / Composite.
4. Click Apply, then queue the workflow as usual.
5. White mask = screen area (replace with background in composite).
6. Optional invert = subject mask.

Pair with core nodes: Grow Mask, Feather Mask, Image Composite Masked.

License

MIT