Motion Tracker — Record → Calibrate → Click-to-Mark Frame-by-Frame → CSV

Detected FPS —

FPS override

Mode Idle

Calibration distance (m)

Use +y upward (invert screen y)

Calibration not set Click “Begin Calibration”, then click two points on the video. Enter the real distance in meters.

Jump to frame

Frame timing —

Workflow: Start Camera → Record → Stop → Begin Calibration (2 clicks) → Begin Tracking (click object each frame).

Frame: —

Time: —

—

Note: browsers do not guarantee perfect frame-accurate stepping. This tool steps using time = frame/fps, which is typically accurate enough for classroom work.

Data table Time is rounded to 1 dp. Distances are rounded to 3 dp.

Frame	Time (s)	x (m)	y (m)	Δx (m)	Δy (m)	Distance (m)