Quote what a lecturer says at one moment

What was saidLectureTool missed

0:27CC-BY-3.0 · Berkman Center (presenter: William Fisher)

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Tool calls

3 calls · agentic-video 0.3.1

transcribeimac · 56 ms

Arguments

{
  "source": "$CLIP"
}

Result

{
  "ok": true,
  "data": {
    "status": "in_progress",
    "requested_model_size": "tiny",
    "requested_model_cached": false,
    "transcription_status": "started",
    "retry_after_seconds": 15,
    "transcription_message": "The tiny transcription started in the background. About 0% done (estimate): 0 s elapsed of roughly 10 s. Retry in about 15 seconds.",
    "elapsed_sec": 0,
    "estimated_total_sec": 10,
    "estimated_percent": 0
  }
}

transcribeimac · 2 ms

Arguments

{
  "source": "$CLIP"
}

Result

{
  "ok": true,
  "data": {
    "status": "in_progress",
    "requested_model_size": "tiny",
    "requested_model_cached": false,
    "transcription_status": "in_progress",
    "retry_after_seconds": 15,
    "transcription_message": "A transcription for this video is already running. About 30% done (estimate): 3 s elapsed of roughly 10 s. Retry in about 15 seconds.",
    "elapsed_sec": 3,
    "estimated_total_sec": 10,
    "estimated_percent": 30
  }
}

transcribeimac · 2 ms

Arguments

{
  "source": "$CLIP"
}

Result

{
  "ok": true,
  "data": {
    "source_path": "~/hill/gallery/repo/cards/quote-lecture/clip.mp4",
    "language": "en",
    "duration_sec": 27.027,
    "segment_count": 9,
    "segments": [
      {
        "id": 1,
        "start_sec": 0.02,
        "end_sec": 3.02,
        "text": "to ensure that you have the most current version.",
        "start_timecode": "00:00:00.020",
        "end_timecode": "00:00:03.020",
        "confidence": 0.979
      },
      {
        "id": 2,
        "start_sec": 3.02,
        "end_sec": 7.02,
        "text": "So, now let's turn to the topic for today,",
        "start_timecode": "00:00:03.020",
        "end_timecode": "00:00:07.020",
        "confidence": 0.979
      },
      {
        "id": 3,
        "start_sec": 7.02,
        "end_sec": 10.02,
        "text": "which is indicated is copyright theory.",
        "start_timecode": "00:00:07.020",
        "end_timecode": "00:00:10.020",
        "confidence": 0.979
      },
      {
        "id": 4,
        "start_sec": 10.02,
        "end_sec": 13.02,
        "text": "As I've just mentioned by theory, I mean nothing more than",
        "start_timecode": "00:00:10.020",
        "end_timecode": "00:00:13.020",
        "confidence": 0.979
      },
      {
        "id": 5,
        "start_sec": 13.02,
        "end_sec": 17.02,
        "text": "arguments concerning when and why copyrights should be created",
        "start_timecode": "00:00:13.020",
        "end_timecode": "00:00:17.020",
        "confidence": 0.979
      },
      {
        "id": 6,
        "start_sec": 17.02,
        "end_sec": 21.02,
        "text": "and what the scope or limits of those rights should be.",
        "start_timecode": "00:00:17.020",
        "end_timecode": "00:00:21.020",
        "confidence": 0.979
      },
      {
        "id": 7,
        "start_sec": 21.02,
        "end_sec": 24.02,
        "text": "Before zeroing in on the specific theories",
        "start_timecode": "00:00:21.020",
        "end_timecode": "00:00:24.020",
        "confidence": 0.979
      },
      {
        "id": 8,
        "start_sec": 24.02,
        "end_sec": 26.02,
        "text": "that will occupy us during this lecture,",
        "start_timecode": "00:00:24.020",
        "end_timecode": "00:00:26.020",
        "confidence": 0.979
      },
      {
        "id": 9,
        "start_sec": 26.02,
        "end_sec": 28.02,
        "text": "I should...",
        "start_timecode": "00:00:26.020",
        "end_timecode": "00:00:28.020",
        "confidence": 0.62
      }
    ],
    "has_speech": true,
    "notice": "Note: Non-speech audio (music, sound effects, alarms) is NOT transcribed.",
    "confidence": 0.939,
    "uncertainty": "Whisper confidence is a no_speech_prob proxy; transcript content and alignment remain model-dependent."
  }
}

Question and answer

Question: What exactly is said starting about 4 seconds into this clip?
Answer: The transcript has the speaker saying "So, now let's turn to the topic for today," from 3.0 seconds.

Tool returned: So, now let's turn to the topic for today,
Truth: So now let's turn to the topic for today, which as I've indicated,

Check failedmissing phrases: which

How it was checked

Truth from: captions
Fixed at: 2026-10-30 19:37

Taken from the human captions published with the source: the caption line at 66.97 to 70.98 s in the source, which is 4.00 to 8.01 s in the clip. The clip is the source from 62.97 to 90.01 s, cut with no edit. The line was picked by a seeded rule (seed from the card id) from 16 eligible caption lines of 8 to 25 words, 2 to 10 s long, starting at least 4 s in, ending 0.5 s before the window does, with at least two words of 5 or more letters, and with no sound tag, music mark, dialogue dash or speaker label; the required phrases are the first 3 of those words in the line. No picture or sound was changed, and no tool was asked for the answer.

The check is the published caption file, and the 27-second clip was cut from the source with no edit, so a word that transcribe hears differently counts as a miss.

Try it yourself

Use agentic-video to transcribe my video, then quote the exact words said starting about 4 seconds in. Use my own file.

Get the .mcpb file and open it in Claude Desktop.
Or: pip install agentic-video

Clip and licence

Licence: CC-BY-3.0
Author: Berkman Center (presenter: William Fisher)
Source: commons.wikimedia.org

This file is licensed under the Creative Commons Attribution 3.0 Unported license.