{
  "frames": [
    {
      "requested_t": -7.6,
      "actual_t": -7.6
    },
    {
      "requested_t": -6.3,
      "actual_t": -6.3
    },
    {
      "requested_t": -5.6,
      "actual_t": -5.6
    },
    {
      "requested_t": -0.6,
      "actual_t": -0.5999999999999996
    },
    {
      "requested_t": -0.198,
      "actual_t": -0.1999999999999993
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 3.3,
      "actual_t": 3.3000000000000007
    },
    {
      "requested_t": 4.8,
      "actual_t": 4.800000000000001
    },
    {
      "requested_t": 5.198,
      "actual_t": 5.199999999999999
    }
  ],
  "purpose": "核对停车场两段脚刹和方向机动、日志截止及仅末点零速",
  "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。"
}