One camera, in the back gallery
No markers, no sensors, no special kit. A phone on a tripod behind the back glass, above head height, pointed down the length of the court.
The near player will not be head to toe. From a proper back-gallery position the closest player is seen from above and behind. That is expected, and Core does not mark it down.
What Core checks
Every upload is scored on six things before analysis runs, so a bad angle is caught while you can still refilm it.
Elevation
Above player head height, so the floor is seen at a downward angle. Filming from court level is the single biggest problem.
Full court
The T and both service boxes in frame. The very top of the front wall does not need to be visible.
Both players
Both players somewhere in frame. Partly obscured, bent over or seen from above is fine — they do not need to be head to toe.
Stability
A tripod or a fixed mount. Handheld footage moves the court between frames and costs accuracy.
Wall visibility
Back wall, floor and side walls visible enough to read the court geometry.
Centring
The court roughly centred in frame, not pushed to one side.
Angles to avoid
Court level
Camera at floor or player height. The players hide the ball and each other, and the floor cannot be read.
From the side
A side gallery cuts off the length of the court, so the front and back of rallies fall outside the frame.
Zoomed in
Following the play crops the court. Core needs the whole floor for the entire match, not a close-up.
Behind the front wall
Filming back down the court from the front reverses the geometry and hides the front-wall target.
Filmed one? Upload it.
Core checks the angle first and tells you if anything will hurt the analysis.
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