{
  "frames": [
    {
      "requested_t": -2.388,
      "actual_t": -2.4000000000000004
    },
    {
      "requested_t": -1.97,
      "actual_t": -1.9499999999999993
    },
    {
      "requested_t": -1.85,
      "actual_t": -1.8499999999999996
    },
    {
      "requested_t": -1.292,
      "actual_t": -1.3000000000000007
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.148,
      "actual_t": 0.15000000000000036
    },
    {
      "requested_t": 0.512,
      "actual_t": 0.5
    },
    {
      "requested_t": 2.17,
      "actual_t": 2.1500000000000004
    },
    {
      "requested_t": 5.0,
      "actual_t": 5.0
    }
  ],
  "purpose": "核对静止曲率峰、方向施力与横向恢复；后2.18秒以外画面无配对车况",
  "video_anchor_s": 10.0,
  "note": "使用元数据锚点，不按主观场景判断移动视频；不从未标定画面测算距离或推断路权。"
}