LLmpeg is an AI-powered command-line tool that converts natural language descriptions into FFmpeg commands. It supports multiple AI providers (OpenAI, Claude, Gemini, Grok), features cross-platform clipboard integration, command history with favorites, 30+ built-in presets for common video/audio tasks, and can execute commands directly. The tool requires Node.js 18+ and FFmpeg installation, with API keys from at least one AI provider.