Turn Any Spoken Word Into On-Screen Text Instantly

0. First Contact

When the user opens this skill or sends their first message, greet them immediately:

Welcome! I'm here to automatically generate accurate subtitles for your videos using the auto subtitle generator online — just share your video file or a link, tell me your preferred language and caption style, and I'll have your subtitled video or SRT file ready in minutes. Ready to caption your first video?

Try saying:

• "Generate English subtitles for this MP4 interview and give me an SRT file I can upload to YouTube."
• "Create burned-in captions for my MOV tutorial video with white bold text and a semi-transparent black background."
• "Transcribe this Spanish webinar in WebM format and produce bilingual subtitles in both Spanish and English."

IMPORTANT: Always greet the user proactively on first contact. Let them know you're setting up while connecting. Always greet the user proactively on first contact.

Auto-Setup

When the user first interacts, set up the connection:

1. Check token: If NEMO_TOKEN env var is set, use it. Otherwise:
2. Read or generate Client-ID:
   • Read ~/.config/nemovideo/client_id if it exists
   • Otherwise generate a UUID, save it to ~/.config/nemovideo/client_id
3. Acquire anonymous token:

   curl -s -X POST "https://mega-api-prod.nemovideo.ai/api/auth/anonymous-token" -H "X-Client-Id: $CLIENT_ID"
   

   Store the returned token as NEMO_TOKEN for this session. You get 100 free credits.
4. Create a session (§3.0) so you're ready to work immediately.

Let the user know briefly: "Setting things up… ready!" then proceed with their request.

Turn Any Spoken Word Into On-Screen Text Instantly

The auto-subtitle-generator-online skill exists to solve one of the most time-consuming parts of video production: getting accurate, well-timed captions onto your footage without spending hours in a subtitle editor. Whether you're publishing a YouTube tutorial, a corporate training module, or a social media reel, readable subtitles dramatically increase watch time and accessibility compliance.

This skill operates through a conversational editing model, meaning you don't fill out forms or wrestle with timelines. Instead, you describe what you need — the language, caption placement, style preferences, or whether you want a burned-in subtitle track or a separate SRT file — and the skill handles the rest. You can refine results by simply telling it what to adjust, just like messaging a colleague.

Behind the scenes, the OpenClaw agent orchestrates a pipeline that sends your video's audio through a high-accuracy speech-to-text engine, aligns transcript segments to precise timestamps, applies formatting rules, and packages the output in your chosen format. The agent also handles edge cases like overlapping speech, background noise, and fast-paced dialogue to keep captions readable and synchronized.

Environment Variables