{
  "frames": [
    {
      "requested_t": -1.5,
      "actual_t": -1.5
    },
    {
      "requested_t": -1.0,
      "actual_t": -1.0
    },
    {
      "requested_t": -0.3,
      "actual_t": -0.3000000000000007
    },
    {
      "requested_t": 1.5,
      "actual_t": 1.5
    },
    {
      "requested_t": 2.5,
      "actual_t": 2.5
    },
    {
      "requested_t": 3.5,
      "actual_t": 3.5
    },
    {
      "requested_t": 4.35,
      "actual_t": 4.35
    },
    {
      "requested_t": 5.7,
      "actual_t": 5.699999999999999
    },
    {
      "requested_t": 8.5,
      "actual_t": 8.5
    }
  ],
  "purpose": "核查强制动前后、右侧入口、低TTC对应目标及近零速后的转向",
  "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。"
}