{
  "requested_second": 54,
  "exact_baseline_frame": {
    "id": "f1620",
    "source_frame_index": 1620,
    "timestamp_seconds": 54.0,
    "source_pts_seconds": 54.0,
    "timestamp": "54.000000",
    "reasons": [
      "baseline_1fps",
      "motion_dense"
    ],
    "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001620.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-00001620.webp"
  },
  "nearby_frames": [
    {
      "id": "f1590",
      "source_frame_index": 1590,
      "timestamp_seconds": 53.0,
      "source_pts_seconds": 53.0,
      "timestamp": "53.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001590.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-00001590.webp"
    },
    {
      "id": "f1620",
      "source_frame_index": 1620,
      "timestamp_seconds": 54.0,
      "source_pts_seconds": 54.0,
      "timestamp": "54.000000",
      "reasons": [
        "baseline_1fps",
        "motion_dense"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001620.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-00001620.webp"
    },
    {
      "id": "f1650",
      "source_frame_index": 1650,
      "timestamp_seconds": 55.0,
      "source_pts_seconds": 55.0,
      "timestamp": "55.000000",
      "reasons": [
        "baseline_1fps"
      ],
      "image": "https://ai-video-relay-check-20261027.pages.dev/frames/frame-00001650.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-00001650.webp"
    }
  ],
  "screen_observation": {
    "time": 54.0,
    "source_frame_index": 1620,
    "raw_ocr": "这个满足不了你",
    "raw_caption": "这个满足不了你",
    "raw_title": "",
    "screen_caption": "这个满足不了你",
    "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": 53.96,
      "end": 54.72,
      "text": "我再一瓶走个",
      "confidence": {
        "no_speech_prob": 7.368132493024149e-11,
        "avg_logprob": -0.3996346952951499
      }
    }
  ],
  "content_section": {
    "index": 0,
    "start": 0,
    "end": 57.533333,
    "title": "药店对话与拿药",
    "visual_observation": "白色工作服女子在玻璃柜台旁，与镜头外的人互动；另一名女子一度在后方。女子拿取药盒，机位随她在柜台间横移。字幕从“一两个小时”谈到“八九个小时”，后段出现“睡觉”的反转。",
    "camera": "手持第一视角，有横移、转向和跟随；没有把机位转动当作新剧情。",
    "uncertainty": "对白内容应分别看画面字幕和原始ASR，当前没有独立听写真值。",
    "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"
  ]
}