{
  "cases": [
    {
      "case": "complete",
      "piece_ids": [
        0,
        1,
        2,
        3,
        4,
        5,
        6,
        7
      ],
      "complete": true,
      "direction": "forward",
      "encoded_time": "01:02:03:04",
      "rate_code": 1,
      "compensation_applied": false
    },
    {
      "case": "missing",
      "piece_ids": [
        0,
        1,
        2,
        4,
        5,
        6,
        7
      ],
      "complete": false,
      "direction": null,
      "reason": "未形成连续完整八片窗口"
    },
    {
      "case": "reverse",
      "piece_ids": [
        7,
        6,
        5,
        4,
        3,
        2,
        1,
        0
      ],
      "complete": true,
      "direction": "reverse",
      "encoded_time": "01:02:03:04",
      "rate_code": 1,
      "compensation_applied": false
    }
  ],
  "current_video_position_claimed": false
}