Origin
Can you see the moment an athlete starts to break — before the scoreboard shows it?
TennisMiner was our first attempt to answer that question. The hypothesis: motor control breakdown under competitive pressure has detectable precursors in movement patterns, visible even from 2D broadcast video.
Investigation (Dec 2025)
45 commits over 9 days implementing:
- Audio-based rally detection from video soundtrack
- Interactive labeling tool for shot annotation
- Shot segmentation pipeline for movement analysis
- 100+ test cases validating the pipeline
Outcome
Pivoted. 2D video lacks sufficient granularity for fine motor control detection. But the core hypothesis held — execution breakdown does have substrate-level precursors. The question was not whether the signal exists, but which sensor can reach it.
Voice turned out to be the answer. That discovery led directly to AMPL.