{
  "title": "更换音频输出设备后讲解延迟变了，怎样做口型对照测试",
  "evidence_type": "synthetic-not-field-measurement",
  "date": "2026-10-23",
  "required_deliverable": "同一测试片经不同输出路径的固定机位录像与误差说明",
  "fields": [
    "path",
    "run",
    "camera_fps",
    "flash_frame",
    "audio_marker_frame",
    "camera_distance_m",
    "source_alignment",
    "status"
  ],
  "sample_rows": [
    [
      "usb",
      1,
      60,
      100,
      104,
      2,
      "synthetic-aligned",
      "synthetic"
    ],
    [
      "hdmi",
      1,
      60,
      "",
      "",
      2,
      "pending",
      "not-tested"
    ]
  ],
  "unmeasured": "没有真实测试片播放或固定机位录像；帧差是合成算例，未测任何输出设备延迟。"
}