Ads Factory: Generate Unlimited Length UGC AI Video Pipeline

UGC Ads Factory — Automated AI Video Pipeline

This n8n workflow turns a script and character/setting description from Google Sheets into a complete stitched UGC-style video ad, fully automated from intake to final delivery.

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Overview

The workflow runs a full production pipeline in four stages:

Image Generation
An AI agent creates a photorealistic selfie prompt from the character/setting description.
The image is generated with Kie (Nano Banana), then uploaded to Google Drive and shared.

Scene Scripting
The generated image is analyzed by Claude-4o-mini for visual consistency.
Claude Opus then converts the user script into structured 8-second scenes with consistent visuals and environment-aware motion prompts.

Video Clip Generation
Each scene is sent to Kie VEO3 for video generation.
The workflow polls until each clip is complete, then uploads clips to Google Drive and updates status per scene.

Video Stitching
After all scene clips are completed, clips are sorted and merged into one final video using fal.ai FFmpeg.
The stitched output is uploaded to Drive, and the final links are written back to Sheets.

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Google Sheets Structure

This workflow uses two tabs in one spreadsheet:

Videos (campaign-level tracking)
Main input/output tab with script, character description, aspect ratio, and global run status (Create → Processing → Completed / Failed), plus final video links.

Video Data (scene-level tracking)
One row per scene with scene script JSON, scene number, image URL, clip links, and per-scene status.
This tab enables robust scene retries and progress visibility.

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Triggers

Every 30 minutes: processes new rows in Videos where LAUNCH CREATION = Create
Every 15 minutes: reprocesses rows in Video Data where LAUNCH = Redo
Execute Workflow Trigger: allows orchestration from another workflow

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Error Handling

API nodes retry on failure with a 5-second delay
Failed image or clip generations are written to Sheets with error details
Individual failed scenes can be retried by setting LAUNCH = Redo in Video Data
Final stitching runs only after verifying all required scenes are completed

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External Services

Kie API — image generation (Nano Banana) and video generation (VEO3)
OpenRouter (Claude Opus) — prompt engineering and scene script generation
OpenAI (Claude-4o-mini) — image analysis for visual continuity
fal.ai — FFmpeg-based clip stitching
Google Drive — asset storage and share links
Google Sheets — input/output control plane and status tracking

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Usage

Add a row in Videos with script, character/setting description, and aspect ratio.
Set LAUNCH CREATION to Create.
Wait for the scheduled run (or trigger from another workflow).
Track scene progress in Video Data.
Retrieve final video links in Videos once status is Completed.

To retry failed scenes, set scene status to Redo in Video Data.