🎬 AI-Powered Short Video Generator with Avatar & Captions (n8n Workflow) This project automates the creation of short-form videos (like Reels or TikToks) using product descriptions. It generates an AI script, image prompts, avatar voiceover, and video with captions—completely hands-free.
🧠 AI Agent Prompt Logic Your AI agent acts as a scriptwriter and visual planner, performing the following tasks: Extracts product name + key benefit from a product URL (e.g., Amazon or Shopify). Writes a 4–6 line persuasive video script in a natural, influencer-style tone. Generates matching image prompts for each line of the script (DALL·E or similar). Sends data to Heygen API for avatar generation and voiceover. Builds video with alternating avatar placement, synced voiceover, and captions. Outputs the video file.
✨ Output Format (from AI Agent) json Copy Edit { "script": [ "Hook line to grab attention", "Tip 1 - how it works", "Tip 2 - benefit", "Tip 3 - habit/result", "CTA - comment or visit link" ], "image_prompts": [ "Prompt for Hook", "Prompt for Tip 1", "Prompt for Tip 2", "Prompt for Tip 3", "Prompt for CTA" ] } ⚙️ Modules Overview (What Each Node Does) Step Description 📨 Trigger When chat message received – starts the flow 🧠 AI Agent Uses Groq/OpenAI model with prompt for script + visuals 🧩 Code Parses script + prompts 🎭 Avatar Uses Heygen API to generate avatar voiceover 🖼️ Image Gen Generates images per script line (looped) 🎞️ Video Creation Combines avatar and images into a full video 💬 Captions Optional subtitle overlay 📁 Output Saves the video file to disk and/or sends webhook
📝 Note: Unlike the Instagram example, this project downloads the final video locally rather than posting it back to Google Sheets.
📥 Input Product page URL (Amazon / Shopify)
Trigger via chat, webhook, or manual test
📤 Output A complete, ready-to-post short video
Avatar speaking the script
Background images match the voiceover
Optional subtitles
Video file downloaded locally
🛠️ Stack Used n8n (workflow builder)
OpenAI or Groq (script + visual planner)
Heygen API (avatar & audio sync)
Image Generation API (DALL·E or custom)
FFmpeg / Command Execution (video assembly, optional subtitles)
Webhook or Disk Node (final output)
📌 To Customize or Extend 🔄 Replace trigger with Google Sheets node for full automation
🌍 Localize scripts to other languages
📲 Auto-upload to TikTok, IG Reels, or YouTube Shorts via API
🧠 Use Pinecone or Simple Memory for smarter responses