Removes rolling-shutter banding from artificial light. Runs entirely in this page — your video is never uploaded.
Clip
Or drop one here. Shoot under fluorescent or LED light; also try one in daylight, which should come back Clean.
Input rotation
The band runs across the sensor’s readout rows, so it has to be horizontal in the frame being measured. Browsers rotate portrait video for display, which would hide it — Auto undoes that. If a clip you know flickers comes back Clean, try the rotations by hand.