A useful camera angle
Choose the view for the question: rear three-quarter for spacing, side for timing, and behind the baseline for serve alignment.
Tennis filming guide
How to film tennis strokes for clearer video analysis.
You do not need a production crew. A stable phone, a safe position, useful framing, and several repetitions of one task give AI and human reviewers far better evidence.
Court safety comes first: keep the phone, tripod, and operator outside active movement and ball paths.
Phone setupEvidence review
Rear three-quarter view · full-body frame
01
PositionOutside the court or safely behind the baseline.
02
FrameFeet, racket path, contact area, and recovery stay visible.
03
TaskSeveral repetitions with the same target and approximate pace.
Readable motion
Stable framing, enough light, and sensible distance reduce blur, crop, and side-identification errors.
Comparable sessions
Repeating the same setup makes changes in the player easier to separate from changes in the camera.
A transparent workflow
From court footage to a focused next step
ACEAI separates observable evidence from coaching interpretation so you can understand where each suggestion comes from.
- 1
Define the question
Decide whether you want to study preparation, spacing, contact timing, balance, serve alignment, or another visible pattern.
- 2
Choose a safe view
Place the camera outside the hitting area and use a stable support at roughly waist-to-chest height.
- 3
Run a framing test
Record one repetition and confirm that the feet, hands, racket, likely contact area, and finish remain visible.
- 4
Capture a short set
Record several similar attempts without camera cuts, then trim dead time before analysis if needed.
Choose the angle
Match the camera position to the coaching question
No single angle reveals every part of a tennis stroke. Perspective can make contact look farther forward, compress the distance between player and ball, or hide the hitting arm behind the torso. Choose one primary question and position the camera to make that relationship visible.
Keep each angle in a separate clip. Moving the phone during a rally changes scale and perspective, creates blur, and makes frame-to-frame pose estimates less stable. A fixed wide view is usually more useful than a close handheld shot that follows the racket.
Rear three-quarter
Useful for groundstroke spacing, court movement, unit turn, and recovery direction while preserving some side information.
Direct side
Useful for preparation timing and forward contact relationship, but can hide the far arm and exaggerate depth errors.
Behind the baseline
Useful for serve alignment, toss relationship, landing direction, and patterns across the width of the court.
Front view
Can reveal lateral posture and symmetry, but must be placed safely beyond the incoming-ball path and may hide depth.
Framing and distance
Make the player large enough to read without cropping the action
For groundstrokes, include both feet, the racket tip at the widest preparation and finish, and space around the likely contact point. For serves, add substantial room above the player for the toss and racket. A test recording is the fastest way to catch an unexpected crop.
Avoid digital zoom because it magnifies shake and compression. Move the camera closer only when that remains safe and the full action still fits. Landscape orientation usually gives groundstrokes useful horizontal room; portrait can work for a serve if it still captures alignment and landing, but consistency matters more than orientation.
Camera height
Waist-to-chest height is a practical starting point that avoids an extreme low or overhead perspective.
Player scale
Aim for the player to occupy a meaningful part of the frame while leaving a margin for movement and the racket.
Level horizon
Keep court lines visually stable so posture and movement are easier to interpret.
No panning
Let the player move within a fixed view rather than asking the camera operator to chase each swing.
Light and phone settings
Clear exposure matters more than maximum resolution
Fast rackets and hands blur when light is low and the phone uses a slower shutter. Daylight or bright, even court lighting is more valuable than recording an enormous file in a dark setting. Avoid pointing directly toward a low sun or bright floodlight that turns the player into a silhouette.
Use the normal camera lens when possible, clean the lens, and disable filters or cinematic modes that create artificial blur. Sixty frames per second can provide more temporal detail in good light, but a bright stable 30 fps recording may be clearer than a dark noisy 60 fps clip. ACEAI adapts the analysis payload by selecting and compressing evidence frames; it does not need the original video to be uploaded.
Design the recording task
Several comparable repetitions beat a long mixed highlight reel
Choose one stroke family, target, and approximate ball condition. Five to ten cooperative rally forehands, a basket of similar serves, or repeated volleys at one height create a coherent sequence. Mixing emergency defense, approach shots, returns, and neutral balls makes it difficult to tell technique from tactical necessity.
Keep the useful action compact. A short clip is faster to review, easier to seek, and less likely to include unrelated people. If you want to compare two angles or two tasks, analyze separate clips and label the conditions. Record the same setup later to make progress comparisons more meaningful.
State the task
Note the stroke, direction, feed type, and whether the player is prioritizing control, shape, or pace.
Include normal misses
Do not keep only the cleanest attempt; recurring patterns often appear across successful and unsuccessful balls.
Questions, answered
Frequently asked questions
Should I film tennis in portrait or landscape?
Landscape usually gives groundstrokes and court movement more horizontal room. Portrait can give a serve useful overhead space. Choose the orientation that keeps the complete action visible, and keep it consistent when recording a later comparison.
Is 60 fps required for AI tennis analysis?
No. Higher frame rate can help with fast motion when lighting is good, but stable framing and clear exposure matter more. A bright 30 fps clip can be more useful than a dark, noisy high-frame-rate recording.
How long should a tennis analysis video be?
Use a short clip containing several repetitions of one task. There is no need to upload an entire practice session. Remove long gaps, camera setup, and unrelated play while preserving the complete movement around each attempt.
How close should the phone be?
Close enough that the player and key joints are readable, but far enough to include both feet, the entire racket path, contact area, and recovery. Court layout and lens width vary, so make one test recording before the full set.
Can another person hold and follow the phone?
A fixed support is preferable. Handheld panning changes scale, perspective, and blur through the swing. If no tripod is available, brace the phone securely from a safe location and keep the view fixed.
Train with evidence
Set the camera once. Give every repetition a fair comparison.
Use a stable, well-lit clip with one clear task, then let the evidence guide the next practice decision.