{
  "frames": [
    {
      "requested_t": -1.2,
      "actual_t": -1.1999999999999993
    },
    {
      "requested_t": -0.87,
      "actual_t": -0.8499999999999996
    },
    {
      "requested_t": -0.8,
      "actual_t": -0.8000000000000007
    },
    {
      "requested_t": 3.0,
      "actual_t": 3.0
    },
    {
      "requested_t": 3.5,
      "actual_t": 3.5
    },
    {
      "requested_t": 4.0,
      "actual_t": 4.0
    },
    {
      "requested_t": 5.7,
      "actual_t": 5.699999999999999
    },
    {
      "requested_t": 6.7,
      "actual_t": 6.699999999999999
    },
    {
      "requested_t": 8.5,
      "actual_t": 8.5
    }
  ],
  "purpose": "核查事前施力与曲率差、信号灯变色在退出之后、后段右转及对向车辆",
  "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。"
}