{
  "frames": [
    {
      "requested_t": -2.0,
      "actual_t": -2.0
    },
    {
      "requested_t": -1.0,
      "actual_t": -1.0
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.9,
      "actual_t": 0.9000000000000004
    },
    {
      "requested_t": 1.8,
      "actual_t": 1.8000000000000007
    },
    {
      "requested_t": 3.0,
      "actual_t": 3.0
    },
    {
      "requested_t": 5.0,
      "actual_t": 5.0
    },
    {
      "requested_t": 7.9,
      "actual_t": 7.899999999999999
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核对夜间支路右弯接近STOP横向道路，不把后见横穿车回填为首次脚刹致因",
  "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。"
}