{
  "frames": [
    {
      "requested_t": -5.19,
      "actual_t": -5.2
    },
    {
      "requested_t": -3.45,
      "actual_t": -3.45
    },
    {
      "requested_t": -1.98,
      "actual_t": -2.0
    },
    {
      "requested_t": -0.3,
      "actual_t": -0.3000000000000007
    },
    {
      "requested_t": -0.05,
      "actual_t": -0.05000000000000071
    },
    {
      "requested_t": 0.36,
      "actual_t": 0.34999999999999964
    },
    {
      "requested_t": 1.44,
      "actual_t": 1.4499999999999993
    },
    {
      "requested_t": 6.56,
      "actual_t": 6.550000000000001
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核实公交后低速蠕行、摩托车穿行及刹停恢复，低TTC须保留速度和距离条件",
  "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。"
}