{
  "requested_second": 171,
  "exact_baseline_frame": {
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    "source_pts_seconds": 171.0,
    "timestamp": "171.000000",
    "reasons": [
      "baseline_1fps",
      "motion_dense"
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    "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005130.webp",
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    "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005130.webp"
  },
  "nearby_frames": [
    {
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      "source_pts_seconds": 170.4,
      "timestamp": "170.400000",
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        "scene_change",
        "scene_context"
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      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005112.webp",
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      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005112.webp"
    },
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        "interval_middle"
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      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005122.webp"
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      "source_pts_seconds": 171.0,
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        "baseline_1fps",
        "motion_dense"
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      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005130.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "baseline_1fps_or_last"
      ],
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      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005130.webp"
    },
    {
      "id": "f5134",
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      "timestamp_seconds": 171.13333333333333,
      "source_pts_seconds": 171.13333333333333,
      "timestamp": "171.133333",
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      "width": 405,
      "height": 720,
      "selection_reasons": [
        "interval_last"
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      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005134.webp"
    },
    {
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      "timestamp_seconds": 171.16666666666666,
      "source_pts_seconds": 171.16666666666666,
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      "reasons": [
        "motion_dense",
        "scene_change",
        "scene_context"
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      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00005135.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-00005135.webp"
    }
  ],
  "screen_observation": {
    "time": 171.0,
    "source_frame_index": 5130,
    "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": 169.38,
      "end": 171.02,
      "text": "Woo",
      "confidence": {
        "no_speech_prob": 7.860118111935321e-11,
        "avg_logprob": -0.45995079387318005
      }
    }
  ],
  "content_section": {
    "index": 22,
    "start": 170.4,
    "end": 171.166667,
    "title": "彩条过渡",
    "visual_observation": "多色测试条。",
    "camera": "剪辑过渡。",
    "uncertainty": "",
    "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"
  ]
}