How to Film Your Swing So an AI Can Analyze It Right (angle, height, light, fps)
An AI can only analyze what the camera captures. If you film any old way, the analysis will be noise: false angles, mis-detected phases, and tips that don't apply to your real swing. The good news is that with a modern phone and four basic rules you get more than enough material.
The two angles that matter
There are two standard views that every coach and every video system uses:
- Face-on: the camera in front of you, perpendicular to the target line. It shows weight, hand height, ball position, and balance in the finish.
- Down-the-line: the camera behind you, right on the line connecting the ball and the target, at hand height. This is the key view for swing plane and club path.
Set the tripod (or prop it up) at hand height at address, not on the ground or above your head: a high or low camera angle distorts the plane and fools the analysis. From 10-13 feet away your whole body and the club fit in throughout the entire swing.
Light, background, and frames
The driver swing lasts around a second and a half, and the downswing barely two-tenths. At 30 fps the clubhead appears blurry and the AI loses key frames at impact. Film at 120 fps or more (your phone's slow-motion mode) whenever you can.
As for light: front or diffuse overhead light is best, never backlit. A plain background that contrasts with your clothing helps the system pick out your silhouette. Avoid filming against a window or with the sun in front of you.
What a camera sees and what it doesn't
It's worth being clear about the limitations. A phone camera measures body and club kinematics (positions, sequence, tempo), but it doesn't directly measure ball data like ball speed, spin, or launch angle: that's radar territory.
Honest disclosure: Birdia is our app. It analyzes your swing with on-device AI from your phone video, detecting the swing phases and position and tempo metrics. It's not a TrackMan radar: it won't give you spin or ball speed. What it does do, and does very well, is read your motion if the video meets the conditions above. If you film at 30 fps and from the side, no software—ours included—will perform at its best.
Quick checklist before you film
1. Phone propped up or on a tripod, at hand height.
2. Distance 10-13 ft, body and club fully in frame.
3. One face-on angle and one down-the-line.
4. 120 fps if your phone has it.
5. Good light, no backlighting, contrasting background.
Fuentes
- TrackMan — Ball Flight Laws.
- PGA of America — PGA Teaching Manual.
- Titleist Performance Institute (TPI) — screening and video material.
Frequently asked questions
Will a regular camera work or do I need slow motion?
A regular one works to get a general idea, but for the AI to read the transition and impact well, slow motion at 120 fps or more is better. The downswing lasts tenths of a second, and at 30 fps you lose the frames where the important stuff happens.
Is one angle enough?
For a quick look, yes. For a full analysis you'll want both face-on and down-the-line, because each view provides different information: the face-on for weight and balance, the down-the-line for plane and club path. With both, the AI reconstructs your motion much better.
Does it matter whether I film indoors or outdoors?
What matters is the light and the framing, not the location. Indoors, make sure you have enough lighting so the phone doesn't automatically drop the fps. Outdoors, avoid backlighting and harsh shadows that cut off your silhouette. A uniform background always helps.
Analyze your swing free with Birdia →