{
  "requested_second": 114,
  "exact_baseline_frame": {
    "id": "f3420",
    "source_frame_index": 3420,
    "timestamp_seconds": 114.0,
    "source_pts_seconds": 114.0,
    "timestamp": "114.000000",
    "reasons": [
      "baseline_1fps"
    ],
    "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003420.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-00003420.webp"
  },
  "nearby_frames": [
    {
      "id": "f3402",
      "source_frame_index": 3402,
      "timestamp_seconds": 113.4,
      "source_pts_seconds": 113.4,
      "timestamp": "113.400000",
      "reasons": [
        "motion_dense"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003402.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "local_motion_4fps"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003402.webp"
    },
    {
      "id": "f3406",
      "source_frame_index": 3406,
      "timestamp_seconds": 113.53333333333333,
      "source_pts_seconds": 113.53333333333333,
      "timestamp": "113.533333",
      "reasons": [
        "motion_dense"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003406.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "local_motion_4fps"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003406.webp"
    },
    {
      "id": "f3414",
      "source_frame_index": 3414,
      "timestamp_seconds": 113.8,
      "source_pts_seconds": 113.8,
      "timestamp": "113.800000",
      "reasons": [
        "motion_dense"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003414.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "local_motion_4fps"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003414.webp"
    },
    {
      "id": "f3420",
      "source_frame_index": 3420,
      "timestamp_seconds": 114.0,
      "source_pts_seconds": 114.0,
      "timestamp": "114.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003420.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-00003420.webp"
    },
    {
      "id": "f3422",
      "source_frame_index": 3422,
      "timestamp_seconds": 114.06666666666666,
      "source_pts_seconds": 114.06666666666666,
      "timestamp": "114.066667",
      "reasons": [
        "motion_dense"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003422.webp",
      "width": 405,
      "height": 720,
      "selection_reasons": [
        "local_motion_4fps"
      ],
      "source_width": 720,
      "source_height": 1280,
      "image_url": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00003422.webp"
    }
  ],
  "screen_observation": {
    "time": 114.0,
    "source_frame_index": 3420,
    "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": 10,
    "start": 112.166667,
    "end": 118.3,
    "title": "推子与长发人物后脑",
    "visual_observation": "手持推子靠近长发人物头部，人物朝前坐着；后段头部与头发位置变化。",
    "camera": "近距离手持拍摄。",
    "uncertainty": "随后切至另一长发背影画面，不能保证是同一人物。",
    "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"
  ]
}