A powerful AI agent skill for automated video subtitling, captioning, and cloud-based rendering without local software installation.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install free-video-subtitle
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install free-video-subtitle using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Free Video Subtitle?
Free Video Subtitle is a sophisticated Openclaw Skills integration designed to streamline the video post-production workflow. By leveraging cloud GPU nodes, this skill allows developers and content creators to transform raw video files into captioned, high-definition content through simple natural language commands. It eliminates the need for complex video editing software or local processing power, handling everything from transcription to final 1080p rendering in the cloud.
The skill operates via a robust API backend that manages sessions, file uploads, and Server-Sent Events (SSE) for real-time status updates. Whether you are localized a 3-minute YouTube tutorial or creating short-form social content, Openclaw Skills provides the bridge between your AI agent and professional-grade video processing capabilities.
Free Video Subtitle Use Cases
- Automatically add subtitles in English or other languages to tutorial videos.
- Batch processing multiple video files within a single session for consistent styling.
- Generating social media-ready content with text overlays and background music.
- Quick 1080p MP4 exports for users without access to high-end local rendering hardware.
How Free Video Subtitle Works
- Authentication: The skill checks for a NEMO_TOKEN or automatically generates a free anonymous token valid for 7 days.
- Session Initialization: A unique session is created on the cloud backend to track the project state and timeline.
- File Ingestion: Users upload video files (up to 500MB) via multipart upload or provide direct URLs.
- Instruction Processing: Natural language prompts like "add subtitles in English automatically" are sent via SSE to the AI engine.
- Cloud Rendering: The backend queues a render job on a GPU node to composite layers and apply H.264 compression.
- Export & Download: The skill polls the render status and provides a direct download link for the completed 1080p MP4 file.
Free Video Subtitle Setup
To use this Openclaw Skills asset, ensure your environment is configured with the necessary token.
# Set your API token
export NEMO_TOKEN="your_token_here"
# The skill automatically handles anonymous token generation
# if the environment variable is missing.
The skill looks for configuration in ~/.config/nemovideo/ and identifies the platform (e.g., Cursor or Clawhub) based on the installation path.
Free Video Subtitle Data Schema & Taxonomy
The skill manages complex video state using a condensed JSON format to minimize payload size during SSE streams.
| Key | Description | Type |
|---|---|---|
t |
Tracks (Video, Audio, Text) | Array |
tt |
Track Type (0: Video, 1: Audio, 7: Text) | Integer |
sg |
Segments within a track | Array |
d |
Duration in milliseconds | Integer |
m |
Metadata taxonomy | Object |
Exported files are primarily delivered in MP4 format, though the pipeline supports MOV, AVI, WebM, and various audio/image assets.
Free Video Subtitle Advanced Features
- Cloud GPU Pipeline: Offloads heavy rendering tasks to remote nodes, ensuring your local machine stays responsive.
- Timeline State Management: Persists project state across interactions, allowing for iterative refinement of subtitles and overlays.
- Automated Re-authentication: Intelligently handles expired tokens and rate limits to maintain workflow continuity.
- Multi-Track Compositing: Supports simultaneous management of video layers, background music (BGM), and text tracks.
SKILL.md
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