subsync ☆

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Description:
Subtitle speech synchroniser

Type: Cask | Latest Version: 0.17.0@0 | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Multimedia

Tags: subtitles multimedia audio synchronization cli

Install: brew install --cask subsync

About:
subsync is an automatic subtitle speech synchroniser that aligns subtitles with video audio tracks. It uses speech recognition to detect spoken words and timestamps them to adjust subtitle timing. This tool is invaluable for fixing unsynchronized subtitles, ensuring perfect alignment for a seamless viewing experience.

Key Features:

Automatic speech recognition for precise timing
Handles multiple audio languages and subtitle formats
Robust against background noise and music
Command-line interface for scripting and batch processing

Use Cases:

Correcting out-of-sync subtitles downloaded from the internet
Aligning subtitles with a video that has a different runtime or frame rate
Creating subtitles for a video by providing a text transcript

Alternatives:

Subtitle Edit – GUI-based tool with extensive manual editing features, whereas subsync focuses on fully automated audio-based synchronization.
aeneas – Similar audio/subtitle alignment tool, but subsync is often noted for its robustness with real-world audio and different languages.

Version History

Detected	Version	Rev	Change	Commit
Jun 30, 2024 12:03pm	0.17.0	0	VERSION_BUMP	540643be