Convert Reddit threads into short vertical videos with AI images - n8n workflow
Artur## What problem is this solving?
Manually converting Reddit posts into vertical video content is time-consuming:
- You have to read, summarize, write a script
- Generate TTS
- Find stock footage
- Edit everything in a timeline
This workflow automates the full pipeline. It converts any Reddit thread into a polished video with:
- TTS narration
- Subtitle overlays
- AI images from DALL-E
- Automatic rendering via Shotstack
## What this workflow does
This workflow:
1. Extracts Reddit post and comments via Reddit API
2. Summarizes the thread into structured clips using OpenAI
3. Generates search queries for each clip for stock footage
4. Generates AI images with DALL-E
5. Generates TTS audio for each clip using OpenAI Whisper
6. Creates subtitles matching the audio
7. Uploads footage/audio to Shotstack
8. Renders a full vertical video (720x1280) with synced TTS, subtitles, and b-roll
9. Returns a final video URL
## Setup
- Create accounts and API keys for:
- [Reddit Developer App](https://www.reddit.com/prefs/apps)
- [OpenAI](https://platform.openai.com/)
- [Shotstack](https://shotstack.io/)
- Add credentials in n8n:
- Reddit (HTTP Basic Auth)
- OpenAI (API Key)
- Shotstack (HTTP Header Auth)
- Trigger via webhook or manual node. The input must include:
```json
{
"voice": "nova",
"ttsSpeed": 1,
"videoLength": 60,
"redditLink": "https://www.reddit.com/r/example/comments/example_id/example_title"
}
```
## How to customize this workflow
- Tweak OpenAI prompts to change tone or clip granularity
- Change AI images source by swapping DALL-E for another image generation API
- Adjust TTS voices or languages by modifying the voice field
- Modify video styling (fonts, colors, fit modes) in the timeline construction code node
- Control duration by editing the character length formula in the Limit comments length node
## Additional Notes
- All stock videos are selected to match clip themes using generalized keywords to avoid API misses
- Includes wait nodes to ensure Shotstack's async upload/render processes complete before proceeding
- Annotated with sticky notes explaining major sections like TTS, Reddit input, and media timeline
- Avoids community nodes to ensure cloud compatibility
## Example output