{
  "frames": [
    {
      "requested_t": -4.2,
      "actual_t": -4.2
    },
    {
      "requested_t": -1.3,
      "actual_t": -1.3000000000000007
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 1.5,
      "actual_t": 1.5
    },
    {
      "requested_t": 2.7,
      "actual_t": 2.6999999999999993
    },
    {
      "requested_t": 3.2,
      "actual_t": 3.1999999999999993
    },
    {
      "requested_t": 5.73,
      "actual_t": 5.75
    },
    {
      "requested_t": 7.73,
      "actual_t": 7.75
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核对前车离开后的STOP停车及分轴恢复，不把前车驶离解释为危险解除",
  "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。"
}