{
  "id": "C05-N07",
  "title": "同一宣传片导出两次大小差一倍，怎样比较峰值码率",
  "schema_version": "1.0",
  "evidence_kind": "合成输入与协议；非现场测试结果",
  "tool_versions": {
    "generator": "Python 3.12.4",
    "ffmpeg": "8.0.1（仅实际媒体生成与解码）"
  },
  "required_delivery": "逐时间窗包体积、峰值位置和目标机播放记录",
  "input": {
    "window_seconds": 1,
    "packets": [
      {
        "pts_time": 0.1,
        "size": 200000
      },
      {
        "pts_time": 1.1,
        "size": 600000
      },
      {
        "pts_time": 1.7,
        "size": 400000
      }
    ]
  },
  "expected": {
    "mbps": [
      1.6,
      8.0
    ],
    "average_mbps": 4.8
  },
  "measurement": null,
  "unmeasured": [
    "实体播放硬件",
    "显示刷新相位",
    "现场拍摄",
    "实际Windows目标机配置"
  ],
  "record_fields": [
    "window_start",
    "window_seconds",
    "time_basis",
    "video_bytes",
    "audio_bytes",
    "payload_mbps",
    "playback_observation"
  ]
}