{
  "frames": [
    {
      "requested_t": -3.03,
      "actual_t": -3.05
    },
    {
      "requested_t": -1.208,
      "actual_t": -1.1999999999999993
    },
    {
      "requested_t": -0.1,
      "actual_t": -0.09999999999999964
    },
    {
      "requested_t": -0.048,
      "actual_t": -0.05000000000000071
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.812,
      "actual_t": 0.8000000000000007
    },
    {
      "requested_t": 2.411,
      "actual_t": 2.4000000000000004
    },
    {
      "requested_t": 4.999,
      "actual_t": 5.0
    },
    {
      "requested_t": 8.322,
      "actual_t": 8.3
    }
  ],
  "purpose": "核对支路左转、自动减速后再加速与人工制动，峰值早于施力仅约0.05秒",
  "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。"
}