OpenCap Weightlifting Analyzer (V2) + 3D Export (Patched)
OpenCap Weightlifting Analyzer (V2)
Upload OpenCap CSV(s) → map columns once → analyze + overlay reps for Snatch, Clean, and Jerk.
100% in-browser (HTML/CSS/JS). Patched: adds 3D Export (JSON frames) + Send to 3D Player (A and optional Ghost B) with canonical joint mapping.
1) Upload
V2: Multi-file support + overlay comparison. For now, each file = one rep.
(Later: auto-segment multiple reps inside one long file.)
2) Rep & Overlay
Overlay: Off
3) Lift & Column Mapping (Angles)
If time is missing, we auto-use row index.
4) Options
This Analyzer computes starter metrics + phase markers. Next step: we export 3D joints so the Player can animate.
5) 3D Export + Send to 3D Player
How “Send” works: we write the JSON into localStorage using the keys above, then open the Player with
?src=ls&key=YOUR_KEY. Your Player must support that query style.
3D Joint Detection (Rep A)
Detected base joints with *_x/_y/_z: 0
⚠️ No 3D joints detected.
This Analyzer can still do metrics/plots, BUT 3D export needs columns like: pelvis_x, pelvis_y, pelvis_z.
If your OpenCap export does not include 3D joint coords, we must export from a different OpenCap file/format (or from your pose pipeline output).
Outputs
Status: Ready. Load a demo or parse CSV(s).Detected phases: Dip + Power (20 → 50)
Triple Extension Speed (proxy)
0.5
Avg |d(hip+knee+ankle)/dt| during power phase
Catch Depth (proxy)
—
Max knee flexion near catch window
Left–Right Symmetry (knee)
1.8
Mean absolute difference across rep
Jerk Dip–Drive (if Jerk)
39.0 / 0.5
Dip depth + drive speed proxy
Technique Flags (starter)
No obvious flags from starter heuristics.
Rep A markers are shown (Power start/peak/end; Catch or Dip). Export step: 3D joints export is separate and uses detected *_x/_y/_z columns.
Metrics Table
V2: saves a row per rep (Rep A). Overlay rep is for visual comparison.