Realign drifting subtitles against finished video audio

Uses Subaligner to retime an existing subtitle file against the final audio track, then outputs a corrected subtitle asset. This is for subtitle drift, forced alignment, or batch retiming, not for full video editing or general media management.

Prerequisites

FFmpeg

Installation

Requirements and caveats from upstream:

• 
• 
• Note that subaligner[stretch], subaligner[dev] and subaligner[harmony] require eSpeak to be pre-installed:

Basic usage or getting-started notes:

• <details>
• <summary>Install dependencies for enabling translation and transcription</summary>
• <pre><code>pip install 'subaligner[llm]'</code></pre>

• Source: https://github.com/baxtree/subaligner

• Extracted from upstream docs: https://raw.githubusercontent.com/baxtree/subaligner/HEAD/README.md

Documentation

• https://subaligner.readthedocs.io/en/latest/

Source

• Agent Skill Exchange