Automate video voiceover & subtitles with Whisper, OpenAI TTS & FFmpeg

Automate Video Editing with AI

Who’s it for

This workflow is ideal for content creators, training providers, agencies, and businesses that need to quickly turn raw videos into polished, captioned, or narrated content — without hiring editors or spending hours in manual editing tools.

It’s especially valuable for those who want full freedom of video editing capacity on their own platform instead of relying on costly SaaS tools with heavy limitations, recurring fees, or watermarks.
With this template, you get enterprise-grade AI editing self-hosted in your n8n, under your control.

Perfect for:

• E-learning & educators producing accessible multilingual lessons
• Corporate trainers automating internal tutorials and compliance walkthroughs
• Social media teams creating captioned, high-engagement clips
• Product teams generating quick demos and explainer videos

How it works / What it does

This template combines AI transcription, TTS voiceover, and video editing with FFmpeg into a single automated pipeline:

• Voiceover Mode

  • Transcribes video with OpenAI Whisper
  • Cleans text using on-screen frames for accuracy
  • Generates natural AI voiceovers (EN/AR) with OpenAI Speech
  • Re-times the video to match the narration → synced professional dub

• Subtitle Mode

  • Merges multiple video clips with FFmpeg
  • Transcribes or translates audio to generate SRT subtitles
  • Hardcodes captions directly into the final MP4 (style customizable)

✅ Output: a ready-to-publish MP4 with AI voiceover or burned-in subtitles.

Requirements

• n8n self-hosted or cloud instance
• Server with FFmpeg installed
• OpenAI API key (Whisper + Speech)
• (Optional) Google Drive credentials for delivery

How to customize the workflow

• Swap voices in the OpenAI Speech node (change “ash” / “verse” to another).
• Add languages by extending the dropdown in the Upload Video form.
• Change subtitle style (font, margins, background) in the Apply Subtitle node.
• Route final videos to Slack, Notion, or Dropbox instead of Drive.

Why it matters / Benefits

⚡ Save hours of manual editing — no need for Premiere/DaVinci for basic voiceovers and captions.
💰 Cut production costs — avoid hiring voice actors and editors for every video.
🌍 Multilingual content instantly — create English ↔ Arabic versions without re-recording.
📈 Boost engagement — subtitles increase video watch time on social media.
🎨 Professional results on autopilot — clean transcripts, natural AI voices, synced visuals.

💡 SaaS vs Self-Hosted

• Descript, Kapwing, Synthesia → $30–100/month per user, limited exports, watermarks on free tiers.
• This workflow → one-time template + your own server, only pay OpenAI usage (~$0.006/min for Whisper).
• You get unlimited exports, no restrictions, and full data ownership.

What you win buying this template

• A ready-made AI editing studio inside n8n.
• End-to-end automation: upload → AI → polished video.
• Works for solo creators and agencies delivering client-ready assets.
• Scales with your content: handle 1 video or 100, just drop them in.

👉 By purchasing, you get:

• Full workflow JSON file.
• Email delivery with setup guidelines.
• Access to a step-by-step walkthrough video.
• Contact Us via [email protected].