Overtone - Word-timed captions cut for every screen shape

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

Overtone solves the headache of captions that only fit one screen. It stores each spoken word once with timing and speaker data, then cuts separate caption layouts for 16:9, 9:16, or any aspect ratio you name. A CLI turns your subtitles, audio, or video into a single .overtone.json file, while a video.js plugin displays the cut that fits the player. The cuts follow reading rules—avoiding weak line endings, keeping names and numbers together, and giving each speaker their own caption. With offline recutting and optional AI-powered transcription, Overtone makes multi-format captioning effortless.