LeftRightTurnSplit step
1
The clip
Filming notes
- 1Tripod 2–3 m high, centred behind the baseline.Height keeps the feet visible between the legs.
- 2Normal video, 60 fps if your phone offers it, in good light.Settings → Camera → Record Video. Not slow motion: the clip must play at normal speed.
- 3Keep the baseline and both service-line corners in frame.They are the four calibration points.
- 4Short clips, under 30 seconds.One drill or one rally per clip.
2
Calibrating
Pose model idleNo clip yet.
Choose a clip to begin
0.000 s
Calibration
Choose a clip in step 1. It opens here, ready for the four corner clicks.
Mark the court
- ANear-left baseline cornerWhere the baseline meets the singles sideline.
- BNear-right baseline corner
- CRight service-line cornerService line meets the right singles sideline.
- DLeft service-line corner
- PThe player Click on the player to follow. Optional: the nearest player is used otherwise.
Click each point on the clip. Drag a point to adjust it. When all four are placed, the court is redrawn over the clip: the lines should sit on the painted lines.
Section of clip
- Start
- 0.000 s
- End
- 0.000 s
- Real time
- –
Place the four corners to continue.
Measuring
Reading the clip frame by frame.
- Frame
- 0 / 0
- Player found
- –
- Time left
- –
Keep this tab open and in front. The clip plays slowly while it is read; the speed adjusts itself so no frame is skipped, and any frame missed is filled in at the end. The clip's frame rate is detected automatically.
Session
Measurement complete.
Adjust detection
If steps are split in two, raise the planted threshold or the smoothing. If quick steps merge, lower them. The measurements update at once.
3
Measurements
Nothing measured yet.
Your measurements appear here, sized to screenshot on a phone.
Every step and the timeline
Movement speed
Click the timeline to move the clip there. Bands underneath show when each foot is planted.
Step ledger ·
| No. | Time s | Foot | Type | Direction | Turn | Length m | Sideways m | Forward m | Since last s | Airtime ms | Step speed m/s | Body speed m/s | Accel. m/s² | Lands at x, y m |
|---|
- Turn
- Change of direction from the previous step. 90° or more counts as a turn (clay rows).
- Since last
- Seconds since the previous step by either foot.
- Step speed
- Step length divided by airtime.
- Accel.
- How fast body speed was rising (+) or falling (−) at landing.
- Lands at
- Metres on court: x = 0 is the centre mark, y = 0 is the baseline.
Readings come from a camera-based pose model: expect several centimetres of error near the baseline and more toward the net. The Footwork Index is a draft formula.