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caption-burn

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Burned-in captions for a finished vertical video, three kinds. transcribe.py gets word timings from the video's own audio through the GooseWorks proxy (fal Whisper, charged to your GooseWorks credits, cents); captions.py burns one to three words at a time with Pillow + ffmpeg (no libass needed), either pinned to a split-screen seam (plate 25% above / 75% below) or at a fixed height, in a plate, outline or one-word serif style, with an optional red hook card; plates.py burns per-beat caption blocks (black, one union silhouette, placed in the emptiest band) for formats with no voice. The last caption (the CTA) holds to the final frame. Use as the last step of any video ad.

skills/video/caption-burn/SKILL.md

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Source commit df8298140d434a6363de0c265eb6af2e571d97a5

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Last checked
Nov 11, 2026

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1,315
Repository last updated
Nov 6, 2026
License
MIT

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> **Superseded:** the video kit now does this with the captions-layer part, version 1.1.0, in the parts folder of this repository. It burns the same plate captions from the speech timings, holds the last caption to the end, transcribes only when there are no timings, and returns a WebVTT of what it drew. This atom stays, unchanged in behaviour, for skills outside the kit until they move; its scripts still run.

# caption-burn

Captions timed to what is actually said in the finished video, not to the script's
estimate.

## Run

```bash
python transcribe.py --media reel.mp4 --out reel.words.json          # paid, cents
python captions.py --video reel.mp4 --beats cutlist.aligned.json \
    --words reel.words.json --out final.mp4 [--style plate|outline] [--highlight Brand]
```
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