# Swap Object in Video

> To swap an object in a video, upload the clip to Kenerate Genjutsu, pick Swap object and name the object and its replacement — or add a photo of the new one as @image1. The new object takes the original's place, scale and movement in every frame, even in moving hands. Genjutsu swaps objects; it doesn't erase them.

URL: https://kenerateai.com/swap-object-in-video
Publisher: Kenerate AI (https://kenerateai.com)
Last updated: 3 October 2026

## Key facts
- Mode: Swap object
- New object from: Words or a reference photo
- Kept: Place, scale, orientation, motion
- Handled: Hands, contact, reflections, shadows
- Masking: None — you name the object
- Not supported: Erasing objects
- Kenerate Genjutsu (Kenerate): Clip 2–15 s + up to 10 references → 480p, 720p or 1080p · ~2–4 min. Props and products on short clips, fast.
- Kenerate Genjutsu Pro (Kenerate): Clip 2–15 s + up to 10 references → 480p, 720p or 1080p · ~3–6 min. Glass, metal and printed packaging where material detail matters.
- Seedance 2.5 (ByteDance): Clip 4–30 s + up to 30 references → 480p to 4K · ~4–8 min. Longer product shots, several angles of the new object, 4K masters.

## Steps
1. Upload the clip — MP4, MOV, WebM or M4V up to about 100 MB, with the object clearly visible for most of it.
2. Choose Swap object — The mode built for props and products: everything except the named object is told to stay.
3. Add the new object (optional) — A clean product photo as @image1 when it has to match something real.
4. Name old and new — "Replace the red tram with the silver tram from @image1." Naming the original avoids the wrong object.
5. Compare and download — Check hands, reflections and the moments the object is partly hidden, then download the MP4.

## In depth

### Objects in hands: the hard part
An object that's held, turned or poured into touches everything around it. Swap object's instruction asks for the original's exact movement plus correct contact, occlusion, reflections and shadows in every frame. The crystal cup demo is the stress test: the milk still has to land inside a different shape. Fingers wrapped around the object and liquids are where to look first in the compare view.

### Packaging updates and product placement
Keep the original audio on so voice-overs and sound effects stay aligned with the action.
- New packaging on an old product video.
- One hero shot, every product in the range.
- Seasonal versions: a summer can, a winter can.
- Prop fixes: the wrong mug in an otherwise perfect take.
- Pitch mock-ups before a real product exists.

### Instructions instead of masks
Mask-based tools are precise about where, vague about what. Instruction-based swaps are the reverse: you describe what changes and the engine works out where, frame by frame. That saves rotoscoping, but it rewards precise wording — the object's colour, position and role in the shot — and a reference photo when the result must match something real.

## FAQ
Q: Can AI replace an object in a video?
A: Yes. Genjutsu's Swap object mode replaces one object with another across the whole clip. The new object takes the original's exact place, scale, orientation and movement in every frame — including while hands hold, turn or pour into it — with matching contact, occlusion, reflections and shadows. People, background, camera, timing and lighting are told to stay unchanged.

Q: Can it remove an object instead of replacing it?
A: No. Genjutsu is built to swap, not erase: there is no object, text or watermark removal. If you need a still photo cleaned up, Kenerate's AI image editor has a Magic Eraser for painting out unwanted things in a single picture, but that doesn't apply to video clips.

Q: Is this the same as AI video inpainting?
A: It does a similar job a different way. Classic video inpainting regenerates an area you mask by hand, frame by frame. Genjutsu needs no mask: you name the object in words and the engine finds and tracks it through the clip. That's faster, but it means you steer it with a clear description rather than a painted region.

Q: Which objects swap best?
A: Clear, mid-sized objects that stay in view: cups, bottles, phones, bags, shoes, vehicles, signs without lettering, furniture. Tiny objects, objects mostly hidden behind hands, and swaps between very different shapes — a pen into a sofa — are harder. When the new object has a different size, describe how it should sit.

Q: Can I swap in my own product?
A: Yes, that's a common use. Add a clean photo of your product as @image1, pick Swap object and write "replace the bottle with the product from @image1". Seedance 2.5 takes up to 30 references, so you can include several angles. Only swap in products you own or are allowed to show, and don't imply endorsements.

Q: Can I swap several objects in one clip?
A: Swap object focuses on one object per run. To change two things, run it twice — the second time on the first result — or describe both changes in Free edit mode. Running them one at a time is slower but gives you a checkpoint and keeps each swap cleaner.

Q: Is it OK to swap objects in someone else's video?
A: Only with permission. Edit footage you shot or are licensed to use, with the consent of anyone in it, and don't place products or brands in a way that suggests a sponsorship or endorsement that never happened. Label AI-edited footage in ads.

## Related pages
- AI Video Editor: https://kenerateai.com/ai-video-editor
- Video background changer: https://kenerateai.com/video-background-changer
- Character swap AI: https://kenerateai.com/character-swap-ai
- Edit video with an AI prompt: https://kenerateai.com/edit-video-with-ai-prompt
- Runway Aleph alternative: https://kenerateai.com/runway-aleph-alternative

## Sources
- Kenerate Genjutsu (video editor): https://kenerateai.com/app/genjutsu