agentic-video Gallery

Find the edits in a 4-shot sports clip

Cuts and editsSportsVerified
0:13CC-BY-4.0 · Alexis Jazz

Proof frames

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Tool calls

2 calls · agentic-video 0.3.1
detect_cutsimac · 1533 ms

Arguments

{
  "source": "$CLIP"
}

Result

{
  "ok": true,
  "data": {
    "cuts": [
      {
        "timestamp_sec": 2.92,
        "score": 0.303084,
        "kind": "cut"
      },
      {
        "timestamp_sec": 5.75,
        "score": 0.085113,
        "kind": "transition"
      },
      {
        "timestamp_sec": 9.2,
        "score": 0.32056,
        "kind": "cut"
      }
    ],
    "total": 3
  }
}
frame_atimac · 341 ms

Arguments

{
  "source": "$CLIP",
  "time_sec": 2.93
}

Result

{
  "ok": true,
  "data": {
    "frame_time_sec": 2.92,
    "width": 640,
    "height": 360,
    "source_width": 640,
    "source_height": 360,
    "crop": null,
    "scale": 1,
    "file_path": "<cache>/466e072bc43735811d83/frame_at/frame_at_b92c02ebaeafbda2.png",
    "tool_file": {
      "_tag": "ToolFile",
      "name": "frame_at_b92c02ebaeafbda2.png",
      "mimeType": "image/png",
      "encoding": "base64",
      "data": "<406556 base64 chars dropped>",
      "byteLength": 304916
    }
  }
}

Question and answer

Question
Where are the edits in this video? Which are hard cuts and which are fades?
Answer
detect_cuts lists 3 edits: 2.92 s is a hard cut, 5.75 s is a fade, 9.2 s is a hard cut.
Check passedprecision 1.00 (min 1), recall 1.00 (min 1), tolerance 0.5s

How it was checked

Truth from
constructed
Fixed at

Planted by this recipe before any tool ran: ffmpeg cut 4 single-shot pieces from the source (no shot change by ffmpeg scene score above 0.2 within 0.5 s of a piece's edges; piece starts in the source 61.24, 21.44, 10.68, 1.68 s, piece lengths 2.92, 3.36, 3.92, 3.76 s, starts at least 8 s apart) and joined them in order with hard cuts and one 1 s cross-fade (xfade) after piece 2. The truth is the planted edit times 2.92 s (hard cut), 5.78 s (fade), 9.2 s (hard cut): each hard cut at its join, and the fade's middle. The calls are detect_cuts with its default threshold, then frame_at a quarter frame after the first planted edit (a fixed rule).

A script joined 4 pieces of one public sports clip with hard cuts and one 1 s fade, so this tests detection on a known constructed edit, not on a professionally cut film, and the audio was removed.

Try it yourself

Using agentic-video, find the edits in my video (the file I attach or name). Use detect_cuts to list every cut time, then check the first edit with frame_at. Tell me which edits are hard cuts and which are fades, with the times.
  1. Get the .mcpb file and open it in Claude Desktop.
  2. Or: pip install agentic-video

Clip and licence

Licence
CC-BY-4.0
Author
Alexis Jazz
Source
commons.wikimedia.org
This file is licensed under the Creative Commons Attribution 4.0 International license.