ttconv
A pure Python library and CLI tool for converting between subtitle and caption formats like STL, SRT, TTML, SCC, and WebVTT.
What is ttconv?
ttconv is a Python library and command-line tool designed for converting between various timed text formats used in subtitles and captions, such as STL, SRT, TTML, SCC, and WebVTT. It solves the problem of format interoperability in media workflows, enabling seamless translation of subtitle files across different standards and applications.
Media engineers, subtitle translators, and developers working on video processing pipelines, accessibility tools, or localization platforms that require reliable subtitle format conversion.
Developers choose ttconv for its pure Python implementation, support for industry-standard formats, and flexible architecture based on a canonical TTML model, which ensures accurate conversions and optional filtering for specific output requirements.
Overview
Subtitle conversion library and CLI tool. Converts between STL, SRT, TTML, SCC, TTML and WebVTT files.
Use Cases
Best For
- Converting legacy SCC caption files to modern WebVTT for web playback
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