How to Film Your Disc Golf Throw for Form Analysis

People want feedback on their form, and they post video to get it. In our own count of r/discgolf over the last 12 months, 510 posts carried the "Form Check" flair, and the dedicated r/DiscGolfForm community saw 932 posts over the same period. A lot of those clips are hard to read: filmed in portrait, from too close, with feet cut off or the sun behind the thrower. The fixes are simple, and this guide covers them.

Full disclosure: I build Disc Golf Form Analyzer, an app that grades filmed throws. Everything below applies whether you review the clip yourself, post it for a form check, or upload it to an app.

The short answer: two angles, phone settings, framing

If you only remember one setup, make it this:

1. Two clips, two angles. One from directly behind (down the target line), one side-on.
2. Phone at hip height, level, in landscape. Not tilted up from the ground, not shot from eye height looking down.
3. Whole body in frame. Head to plant foot, plus the disc at full reach-back and at the end of the follow-through.
4. Slow motion in good light. A high frame rate and bright, even light give you sharp frames.
5. Several throws, same setup. One throw can be a fluke. Three or four with the same camera position show your pattern.

A forum thread on the best angle for filming drives landed on the same pairing years ago: rear plus side. What has changed is the phone in your pocket and what software can now do with the clip.

Which angle shows which fault

A camera sees motion across its view clearly and motion toward or away from it poorly. That is the whole reason angle matters. Rounding is a sideways path of the arm, so it shows from behind. Weight shift and plant timing happen along the target line, so they show from the side.

What you want to check	Best angle	Why
Rounding (the disc swings wide of the chest)	Behind	The arm's path away from the body is side to side in this view
Power pocket (elbow leading, disc tight to the chest)	Behind or front	You see how far the disc and elbow sit from the body
Early release (the disc leaves the hand off line)	Behind	The disc's departure line is visible against the target line
Plant timing and weight transfer	Side-on	The stride and plant happen across the frame
Hip lead and loading sequence	Side-on, then behind	Side-on shows hips moving before shoulders; behind adds the coil
Posture and the brace	Side-on	Spine angle and the front leg block are side-to-side shapes in this view
Early rotation	Front	You see the chest open toward the target too soon
Chicken wing (forehand elbow flaring)	Front	The elbow's distance from the body faces the camera
Nose angle	None precisely	A small disc tilt a single phone cannot measure reliably

If you can only film one angle, film side-on. It shows the most faults. Then add a behind clip when you are working on rounding or the power pocket. For more on the most common backhand fault, see how to stop rounding your backhand.

A note on nose angle: video is the wrong tool for it. You can sometimes see an obvious nose-up release, but the tilt is a few degrees of a thin object moving fast. Judge it from how the disc flies and from field work, and use video for body positions.

Phone settings: slow motion, frame rate and why timing gets tricky

Frame rate and sharpness

A throw is fast. At normal video settings the arm and disc smear across the frame at the moment that matters most. A review of 2D video analysis in sport notes that images need to be "sharp and motion blur-free, especially in high speed motions" for accurate analysis (Pueo 2016).

Two things reduce blur:

• A higher frame rate. My recommendation for throwing is 120 or 240 fps. On iPhone that is the Slo-mo mode in the Camera app; most Android phones have a Slow motion mode in the camera too. This is practical advice from filming a lot of throws, not a figure from a study.
• More light. Your phone picks its own shutter speed. In bright light it can use a short exposure, which freezes motion. In shade or at dusk it leaves the shutter open longer and the arm blurs, even at a high frame rate.

Why variable frame rate matters for timing

This one caught me out while building the app. iPhones record video at a variable frame rate, so the frames are not always evenly spaced in time. For watching your own throw this does not matter. For anything that measures timing from the clip, the clip has to be converted to a constant frame rate first, or durations come out wrong. If you count frames to time your plant or release, treat the result as approximate.

The same caution applies to slow motion in general. The DGCR thread above makes a good point: use slow motion to see positions, then watch at full speed to judge timing, because slow motion stretches everything and makes a late move look fine.

If you are uploading to an app

Check what the app wants. For Disc Golf Form Analyzer, the standard camera mode works best; skip 4K HDR, ProRes and Cinematic mode. Very large files get compressed on the phone, and a video stored only in iCloud has to be downloaded in Photos before you can upload it. At 30 fps the fastest hand motion still blurs, so the app grades body positions and sequencing, not exact hand speed.

Distance, height, framing and light checklist

Run through this before you throw:

1. Distance: roughly 15 to 25 feet. Close enough that you fill a good part of the frame, far enough that nothing gets cropped during the reach-back or the follow-through.
2. Height: about hip height. A phone on the ground looking up distorts posture and makes your plant leg look longer than it is.
3. Level: the horizon flat. A tilted frame makes a level shoulder line look tilted.
4. Square to the line: for side-on, the camera points straight across the tee, perpendicular to your target line. A paid video review service, The Form Tracker, asks for the same thing: camera perpendicular to the teepad, at least 60 fps, and a disc that contrasts with the background.
5. Framing: whole body plus a margin. Plant foot visible, head visible, disc visible at full reach-back.
6. Landscape: a throw moves sideways. Landscape keeps the run-up and follow-through in frame.
7. Light behind the camera: the sun at your back as the filmer, not behind the thrower.
8. Contrast: a bright disc against grass or trees, and clothing that does not blend into the background.
9. Still phone: tripod, bag, or a friend who keeps it steady. No panning to follow the disc.

Common filming mistakes

Portrait video. The most common one in form check threads. Your body fits, but the run-up and follow-through fall off the sides.

Too close. The reach-back and follow-through leave the frame, which hides exactly the positions people ask about.

Cropped feet. Many faults start at the plant. If the plant foot is out of frame, nobody can tell you whether you are planting early, late or open.

Backlit thrower. With the sun behind you, you become a silhouette. The arm and disc disappear into the glare.

Digital zoom. Zooming in on a phone often crops the sensor and costs sharpness, and it makes small shakes look large. Walk closer instead, or step back and crop later.

Moving camera. Following the disc with the phone smears every frame of your body. Lock the camera and let the disc leave the shot.

One throw only. Your best throw and your worst throw look different. Film a few and look for what repeats.

What to do with the clip

Review it yourself

Watch at full speed first, then step frame by frame through the reach-back, plant and release. Compare it with a clip of a player whose form you trust. There is decent evidence that watching a model helps: a meta-analysis of observational learning found a mean effect of 0.77 on movement form and dynamics, against 0.17 on movement outcome (Ashford, Bennett and Davids 2006). In plain terms, watching good form helps your form more than it helps your results directly. Pair the comparison with one specific thing to change, and one drill for it.

Post a form check

Post the behind and side-on clips together, say what disc you threw, how far it went and how it flew. Commenters give better advice when they can see your plant foot and know the flight.

Use an app

Pose estimation software tracks your body from the video. The model behind MediaPipe Pose, BlazePose, "produces 33 body keypoints for a single person" and runs in real time on a phone (Bazarevsky et al. 2020). That makes phone-based analysis practical, but it is not a lab. A research system using two or more smartphones, OpenCap, measured joint angles with a 4.5 degree mean absolute error compared with lab motion capture (Uhlrich et al. 2023). One phone is less precise than that, which is another reason to film more than one angle and to focus on clear positions rather than small numbers. I go into the details in how AI disc golf form analysis works.

In Disc Golf Form Analyzer, Pose Estimation grades a backhand or forehand against a real coach's ideal form on 20 coach-defined faults (10 backhand, 10 forehand), each with the coach's explanation, a cue, a drill and a short demo clip. 3D Throw turns one clip into a 3D body you can spin to any angle, including top-down, and play at 1/4 or 1/2 speed with a release marker. That helps when your one camera angle hides something, though it is still built from a single video.

If you are comparing tools, I wrote up the disc golf training apps worth knowing, including the ones I do not make.

Whatever you use, the clip is only as good as the filming. Two angles, hip height, whole body, good light, a few throws. Get those right and both people and software can actually help you.