{
  "frames": [
    {
      "requested_t": -2.0,
      "actual_t": -2.0
    },
    {
      "requested_t": -0.2,
      "actual_t": -0.1999999999999993
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.3,
      "actual_t": 0.3000000000000007
    },
    {
      "requested_t": 1.0,
      "actual_t": 1.0
    },
    {
      "requested_t": 2.0,
      "actual_t": 2.0
    },
    {
      "requested_t": 5.0,
      "actual_t": 5.0
    },
    {
      "requested_t": 8.3,
      "actual_t": 8.3
    },
    {
      "requested_t": 9.8,
      "actual_t": 9.8
    }
  ],
  "purpose": "核实接近红灯、进入左转车道和停车的时序，区分道路弯曲与主动避让",
  "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。"
}