How to replace an object in video with local AI
SAM2 click-to-track lets you mark a prop or vehicle and swap its plate — transparent, solid, gallery, or blur — without uploading the clip.
The short answer
Object Replace is the current desktop workbench for non-person subjects. Click the target, SAM2 tracks it, then you pick transparent, solid, gallery, or blur. No media upload. Preview after download; export on pricing.
When object replace beats person replace
- The subject is a bottle, sign, car, or other prop — not a portrait
- You want a click-to-track mask, not a person-tuned body matte
- You need an alpha or a simple plate swap without After Effects
What still needs a compositor
- Heavy occlusion, motion blur, or a target that looks like the background
- Multi-layer VFX or a tracked camera move
- You need a ProRes 4444 / PNG sequence for someone else's graph
How to run the workbench
- Import the clip and click the object you want to isolate
- Pick transparent, solid, gallery, or blur; preview 1s/3s/5s on a hard frame
- Export locally, or send the composite through Video Converter
Experience on Your Own Footage
Download KwaFlux locally and render 1s, 3s, and 5s previews before you pay — 100% on your GPU without cloud upload.
Frequently asked questions
Does SAM2 upload my video?
No. Tracking and compositing run on your machine. KwaFlux does not upload the clip to finish a preview or export.
Should I use person replace instead?
If the subject is a person, yes — that path is tuned for portraits. Object replace is for everything else you can click.
Related in this topic cluster
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