Burn word-highlighted karaoke captions onto videos with FFmpeg and FFprobe

by Faceless Channel OS ✓ · 9 views · created 2026-08-20 · Content Creation, Multimodal AI

What this workflow does

This workflow has 12 nodes and runs when someone submits an n8n form (“Burn karaoke captions onto a video”). It uses only n8n's built-in nodes.

How it runs

Trigger: When someone submits an n8n form (“Burn karaoke captions onto a video”).

1. Prepare Run (Code): runs custom JavaScript code
2. Create the temp folder (Execute Command): runs a shell command on the n8n host
3. Restore the uploaded video (Code): runs custom JavaScript code
4. Save the video to disk (Read/Write Files from Disk): writes a file to disk
5. Read video duration and resolution (FFprobe) (Execute Command): runs a shell command on the n8n host
6. Build the karaoke captions (.ass) (Code): runs custom JavaScript code
7. Save the captions file to disk (Read/Write Files from Disk): writes a file to disk
8. Burn the captions into the video (FFmpeg) (Execute Command): runs a shell command on the n8n host
9. Verify the burn succeeded (Code): runs custom JavaScript code
10. Read the captioned video back (Read/Write Files from Disk): reads a file from disk

…plus 1 more step. See the full node list below.

Before you upgrade to n8n 3.0

Nodes used (4)

• n8n Form Triggern8n-nodes-base.formTrigger
• Coden8n-nodes-base.code
• Execute Commandn8n-nodes-base.executeCommand
• Read/Write Files from Diskn8n-nodes-base.readWriteFile

From the author

Quick overview This workflow collects a narrated video and its script via an n8n form, estimates word timings across the video duration, generates karaoke-style ASS subtitles, and uses FFprobe and FFmpeg (libass) to burn word-highlighted captions directly…

View the original on n8n.io → Check your own copy