{
  "frames": [
    {
      "requested_t": -7.3,
      "actual_t": -7.3
    },
    {
      "requested_t": -6.9,
      "actual_t": -6.9
    },
    {
      "requested_t": -5.8,
      "actual_t": -5.8
    },
    {
      "requested_t": -2.1,
      "actual_t": -2.0999999999999996
    },
    {
      "requested_t": -1.95,
      "actual_t": -1.9499999999999993
    },
    {
      "requested_t": -0.05,
      "actual_t": -0.05000000000000071
    },
    {
      "requested_t": 0.8,
      "actual_t": 0.8000000000000007
    },
    {
      "requested_t": 3.0,
      "actual_t": 3.0
    },
    {
      "requested_t": 9.2,
      "actual_t": 9.2
    }
  ],
  "purpose": "区分原先人工左转、转后短暂开启辅助与再次退出，核实低概率和曲率极值的激活背景",
  "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。"
}