{
  "frames": [
    {
      "requested_t": -7.5,
      "actual_t": -7.5
    },
    {
      "requested_t": -6.5,
      "actual_t": -6.5
    },
    {
      "requested_t": -5.5,
      "actual_t": -5.5
    },
    {
      "requested_t": 2.5,
      "actual_t": 2.5
    },
    {
      "requested_t": 3.5,
      "actual_t": 3.5
    },
    {
      "requested_t": 5.5,
      "actual_t": 5.5
    },
    {
      "requested_t": 6.5,
      "actual_t": 6.5
    },
    {
      "requested_t": 8.0,
      "actual_t": 8.0
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核对先近停后起步、道路尽头及退出后的住宅入口转向",
  "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。"
}