{
  "frames": [
    {
      "requested_t": -8.1,
      "actual_t": -8.1
    },
    {
      "requested_t": -3.2,
      "actual_t": -3.2
    },
    {
      "requested_t": -1.7,
      "actual_t": -1.6999999999999993
    },
    {
      "requested_t": -1.084,
      "actual_t": -1.0999999999999996
    },
    {
      "requested_t": -0.842,
      "actual_t": -0.8499999999999996
    },
    {
      "requested_t": -0.584,
      "actual_t": -0.5999999999999996
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 2.657,
      "actual_t": 2.6500000000000004
    },
    {
      "requested_t": 5.3,
      "actual_t": 5.300000000000001
    }
  ],
  "purpose": "核对低TTC的目标与转弯过程、第二次脚刹以及日志末端画面",
  "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。"
}