{
  "frames": [
    {
      "requested_t": -2.0,
      "actual_t": -2.0
    },
    {
      "requested_t": -1.0,
      "actual_t": -1.0
    },
    {
      "requested_t": -0.2,
      "actual_t": -0.1999999999999993
    },
    {
      "requested_t": 0.0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.5,
      "actual_t": 0.5
    },
    {
      "requested_t": 1.0,
      "actual_t": 1.0
    },
    {
      "requested_t": 1.7,
      "actual_t": 1.6999999999999993
    },
    {
      "requested_t": 2.6,
      "actual_t": 2.5999999999999996
    },
    {
      "requested_t": 3.5,
      "actual_t": 3.5
    }
  ],
  "purpose": "核对前车走右侧道路而本车向左侧分支行驶、施力及失去前车目标的过程",
  "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。"
}