MiniMax H3 Recast — AI Video Character Replacement
MiniMax H3 Recast, also called MiniMax H3 Max Recast, replaces a character in existing footage using reference photos while preserving the source motion, camera work and audio.
Source video*Required
Reference images*Required
Replace people with 1–4 reference images. Duration, aspect ratio and soundtrack follow the source video.Source: 5–30 seconds, with every shot no longer than 15 seconds. Reference images match people from left to right by default.
Add a file to Source video.
What you can create with MiniMax H3 Recast
Keep the original movement, camera work, scene cuts and audio while changing the person. Upload a clear source video and photos of the replacement person; optional instructions can describe details to retain.
When to use this tool
Use MiniMax H3 Recast when an existing performance or camera sequence should remain and the person in the footage needs to be replaced using reference photos.
The source video must be 5–30 seconds in total, with no single shot longer than 15 seconds. Upload one MP4 or MOV and 1–4 person photos; choose 768P or 1080P, while output timing, aspect ratio and audio follow the source. Use Reference to Video for a newly directed scene or Extend Video to continue footage beyond its existing action.
A prompt to adapt
Replace the main performer with the person in the reference photos. Preserve the walking motion, camera movement and original scene lighting.
Tool specifications
- Model
- MiniMax H3 Max
- Workflow
- Video Recast
- Output resolution
- 768P / 1080P
- Video duration
- 5–30 seconds
- Source video
- Required; maximum files: 1
- Reference images
- Required; maximum files: 4
How to use MiniMax H3 Recast
- 01
Prepare your brief
Describe the intended result and add the files required by the selected workflow.
- 02
Choose and review settings
The matching model or Agent is already selected. Review its settings, inputs and credit estimate.
- 03
Generate and review
Sign in to submit the task, follow its progress and review the output or storyboard in your workspace.
Check the quote before generating
The live estimate depends on the model, settings and input materials. Sign in and use generation credits to submit a task; review the quote in the tool before you start.
Recast costs 40 credits per second at 768P or 60 credits per second at 1080P. A 10-second source video uses 400 or 600 credits respectively. Credits follow the actual source duration, with the full total rounded up once. The 1–4 character reference photos are included.
View plans and creditsQuestions about this tool
What files does MiniMax H3 Recast need?
Provide one MP4 or MOV source video with a total duration of 5–30 seconds and no single shot longer than 15 seconds, plus 1–4 photos of the replacement person. Output is 768P or 1080P. Instructions are optional, and the duration follows the source video.
Do I need an account?
You can explore the tool and its settings on this page. Sign in to upload task materials, submit generation requests and save results to your workspace.
How are generation credits calculated?
Credits depend on the selected model, duration, resolution and input materials. Review the current estimate before submitting. Agent projects may include several generation tasks, each with its own credit usage. Recast costs 40 credits per second at 768P or 60 credits per second at 1080P. A 10-second source video uses 400 or 600 credits respectively. Credits follow the actual source duration, with the full total rounded up once. The 1–4 character reference photos are included.
Where can I find and download my results?
Completed results are available in your workspace. Open the task to preview or download its files. For an Agent project, review the storyboard and the assembled video in the project.