Combine mismatched video clips into a single MP4 with FFmpeg

by Faceless Channel OS ✓ · 17 views · created 2026-08-20 · Content Creation

What this workflow does

This workflow has 11 nodes and runs when someone submits an n8n form (“Combine video clips with FFmpeg”). It uses only n8n's built-in nodes.

How it runs

Trigger: When someone submits an n8n form (“Combine video clips with FFmpeg”).

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 clips (Code): runs custom JavaScript code
4. Split into one item per clip (Code): runs custom JavaScript code
5. Save each clip to disk (Read/Write Files from Disk): writes a file to disk
6. Build the FFmpeg command (Code): runs custom JavaScript code
7. Combine all clips (FFmpeg) (Execute Command): runs a shell command on the n8n host
8. Verify the combine succeeded (Code): runs custom JavaScript code
9. Read the combined video back (Read/Write Files from Disk): reads a file from disk
10. Attach the combine report to the file (Code): runs custom JavaScript code

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 self-hosted workflow collects multiple uploaded video clips via an n8n form, normalizes them to a chosen output resolution, and combines them into a single MP4 using FFmpeg’s concat filter, then returns the merged file along with a brief…

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