Show HN: Overtone – Transcribe, correct and cut captions for any screen shape

Category: devtools

Tags: captions, video, transcription, subtitles, typescript

Score: 7.0/10 (Innovation: 7, Technical: 7, Documentation: 8, Utility: 6)

Overtone is a captioning tool and format that stores each spoken word once with timing, then generates screen-shape-specific cuts (e.g., 16:9 vs 9:16) following typographic rules to avoid weak line endings. It includes a CLI for transcribing and recutting, a video.js plugin, and a documented JSON format with exporters to WebVTT/SRT.

Target audience: frontend devs, video engineers, content creators, accessibility specialists

Repository: https://github.com/lonthq/overtone-captions · TypeScript · MIT

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