PathPilot Tutorial Generator

Overview

End-to-end AI video pipeline that turns any topic into a fully produced tutorial (script, visuals, narration, MP4) by chaining GPT-4, DALL-E 3 and ElevenLabs through a Next.js review UI.

The Challenge

Producing a professional tutorial video normally means writing a script, sourcing or creating visuals, recording narration, adding subtitles, and editing it all together. That is hours of work per video. PathPilot Tutorial Generator chains GPT-4 (script), DALL-E 3 / Nano Banana Pro (visuals), Runway Gen-4 Turbo (motion), and ElevenLabs (narration) into a single pipeline, orchestrated through a Next.

The Solution

js review UI, so a topic goes in and a finished MP4 with subtitles comes out.

Key Features

• ✓Google SSO authentication with a permitted-user allowlist.
• ✓AI script generation: GPT-4 creates a structured tutorial script from a topic.
• ✓Image generation: DALL-E 3 or Nano Banana Pro (via OpenRouter) generate the visuals for each slide.
• ✓Motion generation: Runway Gen-4 Turbo adds realistic camera motion to static slides.
• ✓Voice synthesis: ElevenLabs premium voices (8 options) with speed control, falling back to gTTS when not configured.
• ✓Subtitle generation: automatic SRT file creation.
• ✓Video assembly: MoviePy compiles the final video.
• ✓Real-time progress & cost tracking: visibility into all 4 generation phases and per-service spend as it happens.