Baseball Pitching Analysis
Eight-phase pitching delivery analysis from side and rear views, with confidence tied to the capture frame rate.
How far has this tool been checked?
The measurements were checked against computer-drawn athletes whose true answers are known exactly. That shows the arithmetic and the event rules are right under clean, controlled conditions. It does not measure how well the body-tracking model sees real people (water, loose clothing, crouching, fast limbs) and has not been compared with a lab or a coach’s stopwatch. Treat the numbers as an aid, and use the confidence label beside each value.
Where the camera goes
Seen from above. Angles are measured round from the front of the athlete; 90° is square-on from the side. Reference line: rubber-to-plate line.
Side view, throwing-arm side, square to the rubber-to-plate line. Stride, front-knee block, trunk tilt, arm position, layback, release height and extension.
How high, and how it should sit
Framing
Side: the whole pitcher, rubber, throwing hand and landing spot, including the top of the leg lift. Rear: pitcher centred with both feet and the landing spot visible.
The 50–75% band is our own guidance. No published source gives a camera distance in metres, so use it as a starting point and adjust until the whole movement fits.
Ready to record?
Tick each item as you set it up. This is a reminder, not a lock.
0 of 11 ready
All the camera settings
Every setting shows where it came from.
- Camera height
- Side: hip-to-chest height. Rear: chest height, held level.
- From published guidance
- Distance
- Side: far enough back that the stride and the follow-through stay in frame. Rear: no numeric distance is published.
- From published guidance
- Frame rate
- 60+ fps (recommended 240). Use the ORIGINAL capture rate. 240 fps whenever the camera offers it. Release height needs 240 fps for high confidence; release extension needs 480 fps. Selectable capture rates: 30, 60, 120, 240, 1000.
- From published guidance
- Resolution
- 1080p recommended
- From published guidance
- Orientation
- Landscape or portrait both work.
- From published guidance
- Lens and zoom
- Use the 1x lens with no digital zoom. Avoid ultra-wide and fisheye lenses.
- From published guidance
- Lighting
- Increase light and avoid a busy background; a plain background helps at 240 fps.
- From published guidance
- Stability
- A stable mount.
- From published guidance
- Calibration
- No calibration is needed for angles. Distances and speeds need a scale (see Calibration).
- From published guidance
Before you start
- Set athlete, age group, windup or stretch, side or rear view, hand, pitch type, pose model and capture frame rate before analysis.
- Keep a real pitch count and follow league pitch-count and rest rules.
- Stay out of the path of batted and thrown balls, behind a fence or screen.
Safety
- Follow league pitch-count and rest rules; this tool is not a pitch counter.
Cues for the athlete
Plain coaching cues, one thing at a time.
No cues are published for this tool.
Why camera position matters
Research behind these rules.
2D angles are only trustworthy when the limb moves in the plane the camera sees. Camera-side joints are measured more accurately than far-side joints, and timing is only as fine as one frame.