{
  "id": "C05-N09",
  "title": "超宽视频被自动旋转或拉伸，怎样核对像素比例与方向标记",
  "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": "方格与圆形样片、像素比例和旋转标记的输出对照",
  "input": {
    "streams": [
      {
        "width": 1920,
        "height": 1080,
        "sar": [
          1,
          1
        ],
        "rotation": 0
      },
      {
        "width": 1440,
        "height": 1080,
        "sar": [
          4,
          3
        ],
        "rotation": 90
      }
    ]
  },
  "expected": {
    "unrotated_dar": [
      1.7777777777777777,
      1.7777777777777777
    ],
    "real_player_rotation_tested": false
  },
  "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": [
    "width",
    "height",
    "sar_num",
    "sar_den",
    "rotation_degrees",
    "scaling_mode",
    "circle_width_mm",
    "circle_height_mm"
  ]
}