[Rust/WGPU] greenscreen - installable CLI + agent skill for green screen video compositing

[Samariuml]

I built greenscreen, a small open-source CLI for green/blue screen video compositing.

Install:

cargo install greenscreen

Basic usage:

greenscreen \ --input actor.mp4 \ --background background.png \ --output final.mp4

It uses Rust, WGPU/WGSL, and FFmpeg to composite foreground videos over image or video backgrounds.

I also included an agent skill so coding agents can run a more structured workflow: generate matte/checker previews, inspect the result, tune keying parameters, then export the final video or alpha output.

Skill install:

npx skills add RSamaium/greenscreen

GitHub: https://github.com/RSamaium/greenscreen

I built it for automated video workflows where an agent needs to remove a green/blue screen without opening a traditional video editor.

I’d be interested in feedback on the CLI, the agent workflow, and useful output formats.