{
  "frames": [
    {
      "requested_t": -2.0,
      "actual_t": -2.0
    },
    {
      "requested_t": -1.3,
      "actual_t": -1.3000000000000007
    },
    {
      "requested_t": -0.5,
      "actual_t": -0.5
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.5,
      "actual_t": 0.5
    },
    {
      "requested_t": 1.2,
      "actual_t": 1.1999999999999993
    },
    {
      "requested_t": 2.2,
      "actual_t": 2.1999999999999993
    },
    {
      "requested_t": 4.6,
      "actual_t": 4.6
    },
    {
      "requested_t": 7.0,
      "actual_t": 7.0
    }
  ],
  "purpose": "核实左侧驶入银色车辆的路径与制动时序，不用雷达缺目标推断无横向冲突",
  "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。"
}