{
  "frames": [
    {
      "requested_t": -2.1,
      "actual_t": -2.0999999999999996
    },
    {
      "requested_t": -0.5,
      "actual_t": -0.5
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 1.95,
      "actual_t": 1.9499999999999993
    },
    {
      "requested_t": 2.44,
      "actual_t": 2.4499999999999993
    },
    {
      "requested_t": 3.1,
      "actual_t": 3.0999999999999996
    },
    {
      "requested_t": 3.5,
      "actual_t": 3.5
    },
    {
      "requested_t": 4.34,
      "actual_t": 4.35
    },
    {
      "requested_t": 4.94,
      "actual_t": 4.949999999999999
    }
  ],
  "purpose": "核对STOP近停、两段原始零速与控制恢复，不把滤波负速当倒车",
  "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。"
}