{
  "frames": [
    {
      "requested_t": 5.9,
      "actual_t": 5.9
    },
    {
      "requested_t": 6.3,
      "actual_t": 6.300000000000001
    },
    {
      "requested_t": 6.5,
      "actual_t": 6.5
    },
    {
      "requested_t": 7.0,
      "actual_t": 7.0
    },
    {
      "requested_t": 7.5,
      "actual_t": 7.5
    },
    {
      "requested_t": 8.0,
      "actual_t": 8.0
    },
    {
      "requested_t": 8.5,
      "actual_t": 8.5
    },
    {
      "requested_t": 9.0,
      "actual_t": 9.0
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核对路口近停与末段转弯方向，不根据方向盘符号单独判定转向",
  "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。"
}