{
  "frames": [
    {
      "requested_t": -3.5,
      "actual_t": -3.5
    },
    {
      "requested_t": -1.6,
      "actual_t": -1.5999999999999996
    },
    {
      "requested_t": -0.3,
      "actual_t": -0.3000000000000007
    },
    {
      "requested_t": 0.5,
      "actual_t": 0.5
    },
    {
      "requested_t": 2.0,
      "actual_t": 2.0
    },
    {
      "requested_t": 3.7,
      "actual_t": 3.6999999999999993
    },
    {
      "requested_t": 5.4,
      "actual_t": 5.4
    },
    {
      "requested_t": 9.5,
      "actual_t": 9.5
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核查排队起步、左侧车辆接近与低速辅助恢复后停车",
  "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。"
}