Filming guide
Last updated: October 27, 2026
In short: behind the end line, 4–6 m high, on a tripod, framing the whole court, the space above the net and the first referee. Camera placement matters more than anything else for automatic analysis.
Placement
| Position | Directly behind one end line, centred. Side angles work but are less accurate |
| Height | 4–6 m (e.g. a balcony). At least 3 m. If the camera is low, near-side players hide far-side players |
| Framing | All four court corners + 1 m on each side + at least 3 m above the net. If the ball leaves the top of the frame it can't be tracked |
| First referee | Keep the referee stand in frame (we read the referee's signal to see who won the point) |
| Fixed camera | Use a tripod and don't move, zoom or pan during the match |
| Orientation | Landscape (16:9). Portrait video can't be used |
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Camera settings
| Resolution | 1080p or higher (4K takes longer to upload) |
| Frame rate | 30 fps or higher (60 fps is fine) |
| Exposure and focus | Lock them if you can (on phones, long-press the screen for AE/AF lock) |
| Stabilization | Turn it off when using a tripod |
| Files | One file per match. If your camera splits by set, upload each file |
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Common problems
| Only half the rallies are detected | The ball leaves the top of the frame, or it's too dark → widen the shot upwards |
| Far-court plays are mostly "needs review" | The camera is too low → raise it |
| Point winner isn't detected | The referee is out of frame → include the referee |
| Results drift partway through | The camera moved → keep it still |
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