Put yourself in a viral clip with one photo — no prompt
I shipped Genjutsu AI — a small web tool for a narrow job: take a video people already share, swap the people for photos you pick, and keep the original take. No prompt. No storyboard. You upload the clip, the app split
I shipped Genjutsu AI — a small web tool for a narrow job: take a video people already share, swap the people for photos you pick, and keep the original take.
No prompt. No storyboard. You upload the clip, the app splits it into scenes and lists who’s in frame. You add one still photo per person you want to change. Everyone else, the background, and the props stay as filmed.
What stays the same
- Shot order, timing, and camera
- Cuts and pacing
- Original audio
What changes
Only the people you assign a photo to. One photo = one identity across every shot they appear in. That can be you, a friend, a pet, a product, or a character.
How it works
- Upload mp4, mov, or webm (up to 80MB), or pick a template (Hotel Lobby, Tiny Desk AI, Night Dance, Bulin 47, and others).
- Scenes and faces are detected automatically.
- Attach a photo for each face you want to replace.
- Generate. Download is 720p with the source audio.
Under the hood it’s a Next.js app with a Python cast pipeline for scene/face work, Prisma + Postgres for accounts and credits, object storage for uploads, and a video model API for the swap. Happy to talk stack details in the comments if anyone’s curious.
Limits worth knowing
| Rule | Detail |
|---|---|
| Scene length | A single scene cannot exceed 15 seconds (shorter clips work best). |
| Resolution | Output is 720p. |
| Credits | 10 credits per 15 seconds; failed runs refund credits. |
| Sign-in | Google — generations stay on your account. |
Credits don’t expire. First 15-second video on Starter is $6.90, then $9.99 (10 credits). Plus and Creator packs are on the pricing page.
Not the same as “Higgsfield Genjutsu”
Genjutsu AI is a separate product: you bring the video, and you attach one photo per person you want in the frame. Same filmed motion, different faces.
Try it
👉 ai-genjutsu.com
A clip under 15 seconds is enough for a first run. I’d love feedback on scene splits, face consistency, and whether the credit pricing feels fair — especially from folks who ship short-form or meme clips.
Disclosure: I built this. It’s a paid credit product, not open source.
Originally published by Dev.to WebDev. Aggregated on AIWithGhost for educational purposes — full credit and traffic to the original publisher.