Melius launches Ditto to swap people, props and backgrounds in video

Melius launched Ditto, a tool that recasts an existing video. It swaps the people, props or background for an avatar, a photo or a new scene, and keeps the original motion, camera movement and timing.

Start from a trending video in the template library, or upload your own clip and trim it to the part you want. Choose who or what to replace, then give Ditto a photo of yourself, one of your avatars or an image for the background. The background can be replaced on its own or together with the people in the scene.

One generation can carry up to 30 replacements, all applied together for one price and one output video. The original audio is kept unless you choose to mute it.

Melius says Ditto runs on its own video processing pipeline, which combines generative models with traditional transformation software. It's available in the Melius app, over the REST API and through MCP. API uploads are MP4 or MOV, and a request can set maxCredits so a video that would cost more never starts.

The API docs call Ditto a beta that is rolling out gradually. Teams outside it get a DITTO_BETA_REQUIRED error and can join a waitlist from Ditto in the app. Melius is also running 25% off for the rest of 2026 to mark the launch.