{
  "frames": [
    {
      "requested_t": -1.49,
      "actual_t": -1.5
    },
    {
      "requested_t": -0.13,
      "actual_t": -0.15000000000000036
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.23,
      "actual_t": 0.25
    },
    {
      "requested_t": 0.5,
      "actual_t": 0.5
    },
    {
      "requested_t": 0.85,
      "actual_t": 0.8499999999999996
    },
    {
      "requested_t": 1.28,
      "actual_t": 1.3000000000000007
    },
    {
      "requested_t": 1.56,
      "actual_t": 1.5500000000000007
    },
    {
      "requested_t": 2.64,
      "actual_t": 2.6500000000000004
    },
    {
      "requested_t": 5.43,
      "actual_t": 5.449999999999999
    },
    {
      "requested_t": 7.79,
      "actual_t": 7.800000000000001
    },
    {
      "requested_t": 9.18,
      "actual_t": 9.2
    }
  ],
  "purpose": "核对退出、脚刹、行人出现和后续骑行车辆及再制动；不倒推原因",
  "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。"
}