Why Green Screen Alternative Works Here
Frame-differencing, not color keying
Motion mode compares each frame against a running background reference to isolate what's actually moving — no specific backdrop color required, unlike a real chroma key setup.
Works with an ordinary room, not a studio
No green fabric, no dedicated lighting rig — a reasonably static, evenly-lit background (a wall, a room corner) is enough for clean separation.
Adjustable sensitivity
The sensitivity slider tunes how much frame-to-frame change counts as "motion" — dial it to your lighting and camera noise floor.
Auto-Reset Background
Auto-Reset periodically re-seeds the background reference so a gradual lighting change (clouds passing, a lamp flicker) doesn't quietly kill sensitivity over a long session.
Style the isolated silhouette
Fill Shapes, custom colors, and post-fx all apply to the isolated motion outline — a stylized silhouette, not just a raw mask.
Record the result
Record captures the composited output — live feed plus the motion-isolated overlay — as a downloadable WebM or MP4 file.
Frequently Asked Questions
Do I need an actual green screen for this?
No — Motion mode isolates movement from a static background using frame-differencing (comparing consecutive frames), not color keying, so no green fabric or backdrop color is required.
Will this work with any background?
It works best with a reasonably static background — a wall or room corner works well. A busy background with its own movement (trees blowing, people walking past) will get picked up as motion too.
How is this different from a real chroma key setup?
A real green screen keys out a specific color regardless of movement. Motion mode instead detects change between frames — it isolates movement, not a color, so a still subject in front of a static background won't be detected until it moves.
Can I record the isolated output?
Yes — Record exports the full composited motion-isolated overlay as a WebM or MP4 video file.
Is it free?
Yes — runs entirely in your browser, free, no signup, no download.
