{
  "schema": {
    "Frame": "Zero-based decoded video frame index",
    "Visibility": "1=position supplied; 0=missing/absent estimate",
    "X": "Horizontal pixel coordinate in original video",
    "Y": "Vertical pixel coordinate in original video",
    "Source": "Coordinate-generation method; not a truth label"
  },
  "soccer": {
    "video": "../../take-home-football-tracker/assets/single-ball.mp4",
    "sha256": "3d3dcf74138781f5885cd39c0ccf6a393c1b0b4cc33958e911801c9004726b6b",
    "fps": 24,
    "frames": 179,
    "positions": "soccer.csv",
    "method": "Actual sampled CNN detections from the separate local demo; existing pointAt() maps the measured sample trajectory onto each original video frame. Source explicitly distinguishes sample/interpolation/brief hold.",
    "sourceMeasurements": "soccer-source-measurements.json",
    "groundTruth": false
  },
  "pingpong": {
    "video": "../../take-home-football-tracker/assets/ping-pong.mp4",
    "sha256": "c6db59368e51e8d6ede78d681cf81930c13143ef6a722fd29e8d1a8aab363b24",
    "fps": 24,
    "frames": 158,
    "positions": "ping-pong.csv",
    "method": "measure_orange_ball.py processes each decoded frame with color and component-shape rules; missing estimates remain Visibility=0. No interpolation and no CNN in this coordinate generator.",
    "groundTruth": false
  },
  "mediaCredits": "../../take-home-football-tracker/ATTRIBUTION.md",
  "note": "The four rows in schema-example.csv are invented schema illustrations only; they are not positions for either sample video.",
  "basketball": {
    "video": "../../take-home-football-tracker/assets/basketball-long.mp4",
    "sha256": "3a7587eca26cb30b1e7713bfae018fe1e01ae66ad12eb8896b73e28031d5c2b8",
    "fps": 24,
    "frames": 424,
    "positions": "basketball.csv",
    "method": "Actual MobileNetV1+SSD samples with CNN-seeded appearance measurements; pointAt maps adjacent valid samples onto original video frames. Missing samples break the path. Sources explicitly distinguish interpolation and measured points.",
    "sourceMeasurements": "basketball-source-measurements.json",
    "groundTruth": false,
    "availablePositionFrames": 86,
    "cnnSamples": 5,
    "appearanceSamples": 64,
    "missingSamples": 109,
    "sourceUrl": "https://mixkit.co/free-stock-video/basketball-player-dribbling-ball-744/"
  },
  "juggling": {
    "video": "../../take-home-football-tracker/assets/soccer-juggling.mp4",
    "sha256": "aa8b172240fe3236735e5c4951660ec1f7b6613308402583255c2854538e4841",
    "fps": 24,
    "frames": 346,
    "positions": "juggling.csv",
    "method": "Actual MobileNetV1+SSD detections and CNN-seeded color measurements from 146 samples; pointAt maps valid neighboring measurements onto each original video frame, without crossing missing samples.",
    "sourceMeasurements": "juggling-source-measurements.json",
    "groundTruth": false,
    "availablePositionFrames": 297,
    "sampleCounts": {
      "cnn": 85,
      "appearance": 48,
      "missing": 13,
      "total": 146
    },
    "sourceUrl": "https://mixkit.co/free-stock-video/skilled-footballer-demonstrating-ball-juggling-prowess-43491/"
  }
}