{
  "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": 2.0,
      "actual_t": 2.0
    },
    {
      "requested_t": 3.8,
      "actual_t": 3.8000000000000007
    },
    {
      "requested_t": 5.6,
      "actual_t": 5.6
    },
    {
      "requested_t": 6.3,
      "actual_t": 6.300000000000001
    },
    {
      "requested_t": 7.3,
      "actual_t": 7.300000000000001
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核对山林弯路出口STOP、退出后3.9秒才刹车及后续右转",
  "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。"
}