{
  "frames": [
    {
      "requested_t": -6.5,
      "actual_t": -6.5
    },
    {
      "requested_t": -6.15,
      "actual_t": -6.15
    },
    {
      "requested_t": -5.9,
      "actual_t": -5.9
    },
    {
      "requested_t": -3.2,
      "actual_t": -3.2
    },
    {
      "requested_t": -2.7,
      "actual_t": -2.7
    },
    {
      "requested_t": -2.4,
      "actual_t": -2.4000000000000004
    },
    {
      "requested_t": -2.0,
      "actual_t": -2.0
    },
    {
      "requested_t": -1.65,
      "actual_t": -1.6500000000000004
    },
    {
      "requested_t": -1.0,
      "actual_t": -1.0
    }
  ],
  "purpose": "补看前6.15秒右侧及前2.7秒左侧概率最低时的分流标线与路线位置",
  "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。"
}