Convert natural language to video JSON prompts with GPT and Gemini for Veo 3
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
Nodes used (6)
- Google Gemini
@n8n/n8n-nodes-langchain.googleGemini - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Azure OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatAzureOpenAi - Chat Trigger
@n8n/n8n-nodes-langchain.chatTrigger - Basic LLM Chain
@n8n/n8n-nodes-langchain.chainLlm - OpenRouter Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenRouter
What it does
Turn plain-language video ideas into ready-to-use Veo 3 JSON prompts. This workflow takes your free-text prompt, refines it with Langchain AI and Google Gemini, and returns structured JSON tuned for Veo 3 video generation. No manual formatting, no guessing parameters. Last updated: September 2026. Why Use Prompt Converter? Save time: Complex video prompts become structured JSON automatically. No more manual formatting headaches. Avoid guesswork: Vague ideas turn into detailed, cinematic descriptions that match Veo 3 specs. Improve output quality: Every parameter is optimized for Veo 3, so results look realistic and stunning. Gain a creative edge: Rough concepts become vivid video prompts with AI enhancement. Perfect For Video creators: Developers and creators who want quick, precise prompt formatting without coding. AI enthusiasts: Hobbyists and developers exploring Langchain and Google Gemini for media generation. Marketing teams: Professionals making video ads or visuals with consistent, time-saving prompt structuring. How It Works Trigger: You submit a free-text prompt via message or webhook. Process: An AI model reads your text and reworks it into detailed JSON parameters for Veo 3. Smart Logic: Langchain nodes add cinematic detail, set sensible defaults, and structure the data. Output: The refined JSON prompt goes to Google Gemini for video generation with optimized settings. Quick Setup 1. Import the JSON file to your n8n instances 2. Add credentials: Azure OpenAI, Gemini API (AI Studio docs), OpenRouter API 3. Customize: Adjust prompt templates or default parameters in the Prompt converter node 4. Test: Run your workflow with sample text prompts to see videos come to life You'll Need - Active n8n instances - Azure OpenAI API - Gemini API Key - OpenRouter API (alternative AI option) Level Up Ideas - Add integration with video hosting platforms to auto-upload generated videos Nodes Used - Prompt Input (Chat Trigger) - OpenAI (Azure OpenAI GPT model) - Alternative (OpenRouter API) - Prompt converter (Langchain chain LLM for JSON conversion) - JSON parser (structured output extraction) - Generate a video (Google Gemini video generation) Quick Answers How do I submit a prompt? Send free text through a message or a webhook call. What do I get back? Structured JSON parameters tuned for Veo 3, ready for video generation. Which AI services are involved? Azure OpenAI, Google Gemini, and optionally OpenRouter. --- Made by: khmuhtadin Tags: video generation, AI, Langchain, automation, Google Gemini Category: Video Production Need custom work? Contact me Additional info Built with n8n. Need an assessment on your business? Feel free to reach out at https://khmuhtadin.com/consultation/