Letterbox Background Fill Generator

No more distracting black bars on your vertical crops.

A straight vertical crop that just letterboxes a landscape clip leaves distracting empty black bars above and below. This workflow uses AI to fill the empty letterbox space with a blurred or branded background automatically, avoiding the distracting black bars a plain crop leaves behind.

This is a ready-to-import n8n automation workflow (JSON file) built and documented by D-mim Automation — https://dynamic.dmimautomation.com — a specialist studio building no-code/low-code video & photo editing automations for creators and post-production teams.

This automation is powered by AI video/image processing. We recommend kie.ai as an affordable, unified API for the generation/editing step used inside this workflow.

What you get: a fully documented n8n workflow JSON file, delivered instantly after purchase, with sticky-note setup instructions built directly into the workflow (function, required credentials, and business use case).

Category: Video Editing Automation — Vertical Reformatting.

Requires a self-hosted or cloud n8n instance. No coding experience needed — just import the JSON and connect your own credentials.