{
  "frames": [
    {
      "requested_t": -4.6,
      "actual_t": -4.6
    },
    {
      "requested_t": -2.0,
      "actual_t": -2.0
    },
    {
      "requested_t": -0.2,
      "actual_t": -0.1999999999999993
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 1.6,
      "actual_t": 1.5999999999999996
    },
    {
      "requested_t": 2.2,
      "actual_t": 2.1999999999999993
    },
    {
      "requested_t": 3.0,
      "actual_t": 3.0
    },
    {
      "requested_t": 5.95,
      "actual_t": 5.949999999999999
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核实皮卡左移与后方队列显露，脚刹结束后继续减速及末端是否实际停稳",
  "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。"
}