Distinct from reel-builder:

reel-builder generates the video itself (T2V) + can optionally burn its own captions.
This skill takes an EXISTING video as input. No generation.

This skill does NOT:

Generate the video — the input is yours.
Auto-transcribe audio to captions — requires Whisper, planned for a separate transcribe skill (see ROADMAP).
Translate captions between languages — pass already-translated subtitles.
Re-encode video at different resolutions / formats beyond what ffmpeg's drawtext requires (output matches input resolution + codec where possible).
Add audio (TTS overlay) — use voiceover-maker for that.
Mix multiple subtitle tracks — single track per run.

Requires ffmpeg on PATH. install.sh offers to install it; otherwise brew install ffmpeg (Mac) / apt-get install -y ffmpeg (Debian).

subtitle-burner

ROLE