Automatic rally detection
A CoreML detection model, trained on real indoor and beach footage, finds every rally in a recording. No manual trimming, no timestamps to enter.
All products
Sports · Computer vision
LiveBumpSetCut
Never miss a rally again.
- Platforms
- iOS
- Built for
- Players, coaches, and club programs
- Status
- Live
Overview
Volleyball players and coaches record hours of footage and then spend hours more scrubbing through dead time between points. BumpSetCut watches the video for you: an on-device computer vision model tracks the ball, validates its trajectory against real physics, and marks exactly when play starts and stops.
The result is a library of clean, individual rallies you can swipe through, slow down, organize by tournament or player, and export straight to your camera roll. Everything runs on the phone, so a full match is processed without uploading a single frame.
Built with
- PyTorch
- CoreML
- Swift
- SwiftUI
- AVFoundation
- Next.js
BumpSetCut is designed, built, and operated by W12 Systems. The same team that ships it is available for client work.
Features
What BumpSetCut does.
Physics-validated ball tracking
Detections are checked against plausible ball trajectories so a stray hand or a ball on the sideline does not trigger a false rally.
Swipe-through rally viewer
Review clips in a vertical feed with slow-motion and frame-by-frame scrubbing, in portrait or landscape.
Library organization
Folders for tournaments, practices, and players, automatic beach vs. indoor tagging, and instant search across the whole library.
Export and share
Save individual rallies to Photos or share them anywhere. Coaches can turn on a debug overlay to see what the model saw.
Community feed
Post highlights, follow teammates, and build a running reel of your best plays.
How it works
Three steps, start to finish.
- 01
Record or import
Film the match on your phone or import existing footage, up to 4K.
- 02
Process on device
The detection model runs locally and marks every rally. Nothing leaves the phone during processing.
- 03
Review and share
Swipe through the extracted rallies, keep the ones you want, and export or post them.
Get it
BumpSetCut is available today.
Head to the product site to download it, or reach out if you have questions about team or program use.