Badminton video analysis for the overhead and the footwork.
The racket moves faster than the eye. Slow a smash to a quarter speed, step a frame at a time, and show exactly where the rotation stopped.
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What the readings tell you in badminton
33 body landmarks tracked in your browser, with joint angles measured in degrees on every frame. Motion phase and footwork readings are quick landmarks, not scored judgments — the coaching is still yours.
Shoulder rotation on the overhead
Both shoulders are measured in degrees through the stroke, which is how you show a player that their smash is all arm and no body turn.
Elbow angle at contact
Measured on every frame, so the late or early contact point stops being a feeling and becomes a frame number you can both point at.
Knee flexion on the lunge
Knee angles on the front lunge show how much the player is actually loading, which bears directly on recovery speed back to base.
Stance and balance at the split
Stance width and balance are read from ankle and hip position — a quick landmark for the base position before the first step.
Moments coaches stop the tape on
- 01Overhead: the gap between shoulder turn and arm swing
- 02Smash contact point relative to the front shoulder
- 03The split step, and whether it lands before the opponent's contact
- 04Front-court lunge and the push back to base
- 05Net play: racket preparation height and recovery
Filming on a badminton court
- Film from behind and slightly above the back tramlines if you want court coverage, and side-on from the tramlines if you want stroke mechanics. They are different shots.
- Indoor courts are usually lit from directly overhead, which puts the face in shadow. Pose tracking copes, but film from the brighter side of the court where you can.
- Use slow motion if your phone offers it — a smash is over in a handful of frames at normal rates.
- Keep the feet in frame. The footwork read depends on the ankles being visible.
Badminton questions, answered.
Is the shuttle fast enough to track?
The app tracks the body, not the shuttle. That is the point: at smash speed the shuttle is a blur in any phone footage, while the body mechanics that produced it are perfectly readable frame by frame.
Can I analyse doubles rotation?
Tracking follows one body, so for doubles you would zoom onto the player you are coaching. For positional and rotational work, the drawing tools over a paused frame are usually more useful than pose tracking.
Will it work on footage from the back of a sports hall?
It will, but detail survives distance badly once a phone compresses it. Get close enough that the player fills a good part of the frame, or use the zoom before you start marking up.