{
  "samples": [
    {
      "file": "sample-exercise.mp4",
      "title": "开合跳体验样例",
      "original_title": "Ej Exercise - ESP ICT.webm",
      "creator": "EjSupra08",
      "source_page": "https://commons.wikimedia.org/wiki/File:Ej_Exercise_-_ESP_ICT.webm",
      "source_revision": "https://commons.wikimedia.org/w/index.php?title=File:Ej_Exercise_-_ESP_ICT.webm&oldid=1225724282",
      "original_file_url": "https://upload.wikimedia.org/wikipedia/commons/c/c3/Ej_Exercise_-_ESP_ICT.webm",
      "license": "CC0-1.0",
      "license_url": "https://creativecommons.org/publicdomain/zero/1.0/",
      "changes": "Original seconds 10–18 transcoded from WebM to H.264 MP4; audio removed. No pose or movement was altered.",
      "purpose": "Pipeline demonstration and same-clip comparison only; not a teacher/student pair or a validated teaching standard.",
      "sha256": "b4860c829cd8570c88b3acc9aa423efd16537fbf32a176e0d5c9d95e6ef34085",
      "media": {
        "programs": [],
        "streams": [
          {
            "codec_name": "h264",
            "width": 368,
            "height": 656,
            "r_frame_rate": "25572/853"
          }
        ],
        "format": {
          "duration": "8.005631",
          "size": "423809"
        }
      },
      "id": "exercise-cc0",
      "path": "./assets/sample-exercise.mp4",
      "source": "https://commons.wikimedia.org/wiki/File:Ej_Exercise_-_ESP_ICT.webm",
      "description": "公开授权的单人开合跳片段，截取原片第10至18秒。用于体验姿态检测与同片对照，并非教学标准或老师/学生示例。"
    }
  ],
  "comparison": {
    "reference": "exercise-cc0",
    "attempt": "exercise-cc0"
  },
  "note": "同片对比用于体验：示范与练习位置载入的是同一个公开授权片段。结果用于验证分析流程，不表示真实学员水平或舞蹈教学评价。"
}