Filming
How to film badminton techniques for analysis
For every technique, mount the phone horizontally, keep the head, hands, and feet visible, and fill about 60–80% of frame height. Film 3–5 repetitions of the same stroke mainly from the racket side, or hold a ready stance from the front for 3–5 seconds; analysis starts after recording.
Choose the right angle, distance, duration, and frame rate for a smash, clear, drop, serve, net shot, drive, or ready stance.
- Author:
- Badmi Editorial
- Published:
- Sep 1, 2026
- Updated:
- Sep 2, 2026
- Reviewed:
- Badmi Editorial · Sep 2, 2026
Filming quality determines whether analysis is trustworthy. Stroke analysis needs a clear view of the racket-side shoulder, elbow, wrist, hip, knee, and ankle; ready stance needs both sides of the body and both feet. Badmi emits filming warnings—and may omit metrics—when the angle is wrong, the athlete is too small, lighting fails, or required landmarks are hidden.
Basics for every technique
- Phone landscape on a tripod; avoid handheld shake.
- Keep the head, both hands, and both feet visible; fill about 60–80% of frame height.
- Leave room for the racket-hand peak during strokes and keep the complete base of support visible for ready stance.
- Prefer one athlete with no occlusion from the net, bags, or other players.
- For strokes, keep one target technique per clip, perform 3–5 repetitions with a natural reset, and avoid long rallies that mix techniques.
Setup and duration by technique
| Technique | Camera and distance | Duration and fps |
|---|---|---|
| Smash / clear / drop | True racket-side profile, 4–6 m away at hip height | 3–5 repetitions; ideally 10–20 s and no more than 30 s, preferably 60 fps |
| Serve | Racket-side profile, 3–5 m away between hip and chest height | 3–5 repetitions; ideally 10–20 s and no more than 30 s, preferably 60 fps |
| Net shot | Slight racket-side angle, 3–5 m away with lens just above net height | 3–5 repetitions; ideally 10–20 s and no more than 30 s; standard 30 fps is usable |
| Drive | True racket-side profile, 4–6 m away at hip height | 3–5 repetitions; ideally 10–20 s and no more than 30 s, preferably 60 fps |
| Ready stance | Straight in front at hip height | Hold naturally for 3–5 s; standard video is enough |
Common failure reasons
- A rear or incorrect-side view that hides or foreshortens the stroke chain.
- A ready stance filmed from the side, preventing reliable stance-width and torso checks.
- Subject too small in frame, suppressing elbow/knee metrics.
- Mixed techniques in one clip, repetitions without a clear reset, or a clip cut too tightly around contact.
- Contact occluded or visibility too low.
- Extra people in frame or heavy camera shake.