n8n Workflow: Turn Instagram Carousels into TikTok Reels MP4

Turn Instagram Carousels into TikTok Reels MP4—Automated in n8n

This n8n workflow takes your uploaded Instagram carousel images, generates a vertical 1080x1920 pan-and-zoom slideshow MP4 with ffmpeg, and submits it to TikTok via SocialRobot as an inbox draft—ready for you to review or publish.

What this workflow does

• Collects inputs via an n8n Form trigger: 2–10 carousel images, a caption, seconds-per-slide, an optional music URL, and a photo-slideshow selection.
• Validates requirements: checks that ffmpeg is installed and confirms 2–10 image files were uploaded.
• Renders the video: creates a temporary execution folder, saves images to disk in order, then builds an ffmpeg filter graph for blur background, pan/zoom motion, and crossfades (and mixes/loops music when a valid http(s) URL is provided).
• Outputs a vertical MP4: runs ffmpeg to render a 1080x1920 video and reads the MP4 back from disk.
• Validates the result: checks the MP4 file size and real duration against configured limits before continuing.
• Sends to TikTok using SocialRobot: uploads the MP4 to TikTok as an inbox draft, and can optionally upload the original images as a TikTok photo slideshow draft.
• Optional multi-platform publishing: the workflow can also upload the same video via SocialRobot to Instagram Reels, Facebook Reels, and Threads—disabled by default—then deletes temporary files.

Use cases

• Repurpose carousel content into TikTok Reels MP4 for faster cross-posting.
• Automate slideshow rendering and scheduling workflows for SaaS marketing and creators.
• Standardize video formatting (1080x1920, pan/zoom, crossfades) from a single input source.

Technical details

• Required: self-hosted n8n with Execute Command enabled and ffmpeg installed on the server.
• File handling: ensures n8n can read/write the temp folder (via the temp_dir setting if needed).
• Workflow nodes/tools: if, set, code, sticky note, form trigger, and stop and error, plus ffmpeg rendering and SocialRobot uploads.