{
  "requested_second": 139,
  "exact_baseline_frame": {
    "id": "f4170",
    "source_frame_index": 4170,
    "timestamp_seconds": 139.0,
    "source_pts_seconds": 139.0,
    "timestamp": "139.000000",
    "reasons": [
      "baseline_1fps"
    ],
    "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004170.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-00004170.webp"
  },
  "nearby_frames": [
    {
      "id": "f4140",
      "source_frame_index": 4140,
      "timestamp_seconds": 138.0,
      "source_pts_seconds": 138.0,
      "timestamp": "138.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004140.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-00004140.webp"
    },
    {
      "id": "f4146",
      "source_frame_index": 4146,
      "timestamp_seconds": 138.2,
      "source_pts_seconds": 138.2,
      "timestamp": "138.200000",
      "reasons": [
        "scene_context"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004146.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "interval_last"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004146.webp"
    },
    {
      "id": "f4147",
      "source_frame_index": 4147,
      "timestamp_seconds": 138.23333333333332,
      "source_pts_seconds": 138.23333333333332,
      "timestamp": "138.233333",
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        "scene_context"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004147.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "interval_first"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004147.webp"
    },
    {
      "id": "f4170",
      "source_frame_index": 4170,
      "timestamp_seconds": 139.0,
      "source_pts_seconds": 139.0,
      "timestamp": "139.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004170.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-00004170.webp"
    },
    {
      "id": "f4200",
      "source_frame_index": 4200,
      "timestamp_seconds": 140.0,
      "source_pts_seconds": 140.0,
      "timestamp": "140.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00004200.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-00004200.webp"
    }
  ],
  "screen_observation": {
    "time": 139.0,
    "source_frame_index": 4170,
    "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": [
    {
      "start": 138.84,
      "end": 139.9,
      "text": "饭鸡蛋饼就活",
      "confidence": {
        "no_speech_prob": 4.3969248381126036e-11,
        "avg_logprob": -0.8778380614060622
      }
    }
  ],
  "content_section": {
    "index": 17,
    "start": 138.233333,
    "end": 145.3,
    "title": "炒锅内浅色食物与抖锅",
    "visual_observation": "手握炒锅柄抖动锅体；浅色食物先在锅内可见，后段锅内为空。",
    "camera": "手腕与锅体连续运动，机位接近灶台。",
    "uncertainty": "食物最终落点未从现有代表图确认，不凭空补写。",
    "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"
  ]
}