{
  "requested_second": 64,
  "exact_baseline_frame": {
    "id": "f1920",
    "source_frame_index": 1920,
    "timestamp_seconds": 64.0,
    "source_pts_seconds": 64.0,
    "timestamp": "64.000000",
    "reasons": [
      "baseline_1fps",
      "motion_dense"
    ],
    "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001920.webp",
    "width": 405,
    "height": 720,
    "selection_reasons": [
      "baseline_1fps_or_last"
    ],
    "source_width": 720,
    "source_height": 1280,
    "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001920.webp"
  },
  "nearby_frames": [
    {
      "id": "f1890",
      "source_frame_index": 1890,
      "timestamp_seconds": 63.0,
      "source_pts_seconds": 63.0,
      "timestamp": "63.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001890.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "baseline_1fps_or_last"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001890.webp"
    },
    {
      "id": "f1920",
      "source_frame_index": 1920,
      "timestamp_seconds": 64.0,
      "source_pts_seconds": 64.0,
      "timestamp": "64.000000",
      "reasons": [
        "baseline_1fps",
        "motion_dense"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001920.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "baseline_1fps_or_last"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001920.webp"
    },
    {
      "id": "f1950",
      "source_frame_index": 1950,
      "timestamp_seconds": 65.0,
      "source_pts_seconds": 65.0,
      "timestamp": "65.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001950.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "baseline_1fps_or_last"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001950.webp"
    }
  ],
  "screen_observation": {
    "time": 64.0,
    "source_frame_index": 1920,
    "raw_ocr": "",
    "raw_caption": "",
    "raw_title": "",
    "screen_caption": "",
    "screen_title": "",
    "reviewed_changes": [],
    "verification": "automatic OCR; not independently verified",
    "timing": "observed frame time; onset/offset not known to subsecond precision",
    "is_confirmed_speech": false
  },
  "raw_ASR_at_estimated_time": [],
  "content_section": {
    "index": 1,
    "start": 57.533333,
    "end": 68.333333,
    "title": "遮眼口罩与盘中鸡蛋恶搞",
    "visual_observation": "两人坐在桌边，用口罩遮眼并持叉。左侧人物取下或调整口罩，随后手靠近嘴部并再次遮眼；后段右侧人物也移开口罩、转头，盘中鸡蛋不再可见。",
    "camera": "固定机位为主，动作发生在人物手、脸与餐盘附近。",
    "uncertainty": "稀疏画面不充分证明鸡蛋被吞下或藏在哪里，需看连续预览。",
    "provenance": "assistant visual review of source-frame sheets; not an independent human or automatic semantic-model benchmark"
  },
  "unknowns": [
    "ASR not a verified listening transcript",
    "Caption display time can differ from speech time",
    "Assistant observation must be cross-checked by actually opening image"
  ]
}