Find the cross-dissolve where two shots are joined

Cuts and editsSpaceVerified

0:08PD · NASA Johnson Space Center

Proof frames

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Tool calls

2 calls · agentic-video 0.3.1

detect_cutsimac · 422 ms

Arguments

{
  "source": "$CLIP"
}

Result

{
  "ok": true,
  "data": {
    "cuts": [
      {
        "timestamp_sec": 1.76,
        "score": 0.152541,
        "kind": "cut"
      },
      {
        "timestamp_sec": 4.25,
        "score": 0.334396,
        "kind": "transition"
      }
    ],
    "total": 2
  }
}

inspect_windowimac · 414 ms

Arguments

{
  "source": "$CLIP",
  "start_sec": 3.28,
  "end_sec": 5.28,
  "fps": 2
}

Result

{
  "ok": true,
  "data": {
    "source_path": "~/hill/gallery/repo/cards/dissolve-space/clip.mp4",
    "start_sec": 3.28,
    "end_sec": 5.28,
    "fps": 2,
    "frames": [
      {
        "index": 1,
        "timestamp_sec": 3.28,
        "timecode": "00:00:03.280",
        "file_path": "<cache>/7439d1ee51a2dba7efbc/dense_c4c549bf3c0f59afcdac/frame_0001.jpg",
        "width": 640,
        "height": 360,
        "requested_timestamp": 3.28,
        "decoded_timestamp": null,
        "timestamp_delta": null
      },
      {
        "index": 2,
        "timestamp_sec": 3.78,
        "timecode": "00:00:03.780",
        "file_path": "<cache>/7439d1ee51a2dba7efbc/dense_c4c549bf3c0f59afcdac/frame_0002.jpg",
        "width": 640,
        "height": 360,
        "requested_timestamp": 3.78,
        "decoded_timestamp": null,
        "timestamp_delta": null
      },
      {
        "index": 3,
        "timestamp_sec": 4.28,
        "timecode": "00:00:04.280",
        "file_path": "<cache>/7439d1ee51a2dba7efbc/dense_c4c549bf3c0f59afcdac/frame_0003.jpg",
        "width": 640,
        "height": 360,
        "requested_timestamp": 4.28,
        "decoded_timestamp": null,
        "timestamp_delta": null
      },
      {
        "index": 4,
        "timestamp_sec": 4.78,
        "timecode": "00:00:04.780",
        "file_path": "<cache>/7439d1ee51a2dba7efbc/dense_c4c549bf3c0f59afcdac/frame_0004.jpg",
        "width": 640,
        "height": 360,
        "requested_timestamp": 4.78,
        "decoded_timestamp": null,
        "timestamp_delta": null
      }
    ],
    "contact_sheet_path": "/private<cache>/7439d1ee51a2dba7efbc/contact_sheets/sheet_4samples_4cols_f5171d.jpg",
    "estimated_vision_tokens": 1032,
    "tool_file": {
      "_tag": "ToolFile",
      "name": "sheet_4samples_4cols_f5171d.jpg",
      "mimeType": "image/jpeg",
      "encoding": "base64",
      "data": "<300852 base64 chars dropped>",
      "byteLength": 225637
    }
  }
}

Question and answer

Question: Is there a fade between shots? Where is it?
Answer: The tool reports a transition at 4.25 seconds, where the two shots meet.

Check passedanswer 4.25, expected 4.3 ±0.5

How it was checked

Truth from: constructed
Fixed at: 2026-10-30 19:40

Planted by this recipe before any tool ran: shot A is 4.8 s of nasa-meet-zena-cardman-crew11 from 116.68 s; shot B is 4.36 s of nasa-iss-blood-samples from 30.76 s (another source of the same domain; neither shot has a hard cut inside). ffmpeg joined them with one 1.0 s cross-dissolve (xfade fade) from 3.8 s to 4.8 s of the clip. The truth is the fade midpoint 4.3 s, with tolerance 0.5 s (half the fade), so a cut time anywhere inside the fade passes. The window given to inspect_window is the fade plus 0.5 s either side, fixed here.

A script joined two shots, one from 'NASA astronaut Zena Cardman talks to camera about Crew-11 command' and one from another clip of the same kind, with a planted 1.0 s cross-dissolve and no sound, so the answer is one time inside that fade (not its start and end); the card does not show whether detect_cuts finds other cuts.

Try it yourself

Use agentic-video on my video. Run detect_cuts on the whole video, then run inspect_window over the part where the picture fades into the next shot. Tell me the time of the fade.

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

Clip and licence

Licence: PD
Author: NASA Johnson Space Center
Source: commons.wikimedia.org

This file is in the public domain in the United States because it was solely created by NASA.

Also uses (insert 1)

Licence: PD
Author: NASA Johnson Space Center
Source: commons.wikimedia.org

This file is in the public domain in the United States because it was solely created by NASA.