{
  "frames": [
    {
      "requested_t": -9.0,
      "actual_t": -9.0
    },
    {
      "requested_t": -8.5,
      "actual_t": -8.5
    },
    {
      "requested_t": -8.0,
      "actual_t": -8.0
    },
    {
      "requested_t": -7.5,
      "actual_t": -7.5
    },
    {
      "requested_t": -7.0,
      "actual_t": -7.0
    },
    {
      "requested_t": -6.5,
      "actual_t": -6.5
    },
    {
      "requested_t": -3.5,
      "actual_t": -3.5
    },
    {
      "requested_t": -3.0,
      "actual_t": -3.0
    },
    {
      "requested_t": -2.1,
      "actual_t": -2.0999999999999996
    }
  ],
  "purpose": "补看最低车道概率前7.5秒及次次低谷前3秒，不能把远期低概率当成退出时状态",
  "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。"
}