{
  "frames": [
    {
      "requested_t": -1.912,
      "actual_t": -1.9000000000000004
    },
    {
      "requested_t": -1.2,
      "actual_t": -1.1999999999999993
    },
    {
      "requested_t": -0.8,
      "actual_t": -0.8000000000000007
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.101,
      "actual_t": 0.09999999999999964
    },
    {
      "requested_t": 1.3,
      "actual_t": 1.3000000000000007
    },
    {
      "requested_t": 2.1,
      "actual_t": 2.0999999999999996
    },
    {
      "requested_t": 3.6,
      "actual_t": 3.5999999999999996
    },
    {
      "requested_t": 5.0,
      "actual_t": 5.0
    }
  ],
  "purpose": "核对让行口横向来车、曲率峰、再踩刹及日志加速对应画面；不移动视频时间",
  "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。"
}