Traffic events from a fixed road camera, as time segments you can click.

1. MP4 video
   4K, 29.97 fps, fixed camera
3. Frame samplingRule-based
   Decode once, analyse a subset of frames
5. YOLO detectorLearned
   Fine-tuned, 8 classes incl. red/green signal heads
7. ByteTrackRule-based
   Track ids and trajectories per road user
9. Scene alignmentRule-based
   SIFT + RANSAC homography maps scene.json onto the clip
11. Event rulesRule-based
    Per-class geometry and timing rules on tracks and zones
13. Segment mergingRule-based
    Merge fragments, drop blips, no same-class overlap
15. Events
    [start_sec, end_sec, label]

Blue border = learned component. Everything else is deterministic code whose thresholds are listed below.