MiniMax H3 Max

H3 Max Extend Video adds a text-guided continuation to an existing video. It supports prompt expansion, adjustable duration and aspect ratio, and output resolutions from 480p to 2K, returning either the full extended video or only the new footage.

Input

Fields marked * are required. Review the price before generating.

Video *

URL of the video to extend. Must be 1.625 s to 60 s long, up to 50 MB, aspect ratio between 0.4 and 2.5.

Uploading a file needs an account. Create accountMP4, WebM · up to 100 MB

Prompt *

What happens next. Describe the continuation, not the source.

Duration

Tips and requirements

Seconds of new footage to add. The continuation clip also includes 1.625 seconds from the source's ending and may be longer because of frame rounding.

Resolution

Output video resolution.

Aspect Ratio

Output aspect ratio. 'auto' follows the source video. Other values crop the video to fit the selected ratio.

Additional settings

Enable Prompt Expansion

Automatically enhance the prompt using the source video to help keep the continuation consistent. May increase processing time.

Seed

Seed for the continuation. Random when omitted.

Output

Tips and requirements

'extended' returns the source and new footage as one video. 'continuation' returns a clip that starts with a 1.625-second repeat of the source's ending, then shows the new footage.

Starting price$0.0793 / second

You sign up first. Your settings are kept.

API code for this input

Complete the required fields and fix input errors to see API code.

How to use MiniMax H3 Max

Getting started

Choose the mode for the material you already have. Start with text for a new scene, image-to-video for an opening photo, or a video-editing mode for an existing clip. The default endpoint on this page creates video from text; the other modes have their own model IDs.

Example prompt

A cyclist rides along a quiet riverside path in warm morning light. The camera follows from the side at a steady distance. Keep the rider and bicycle consistent in one continuous shot.

Review your result

Watch the whole clip and listen to the soundtrack. Check the bicycle wheels, body movement, background continuity and any requested speech. Keep the original input and selected settings when comparing another mode.

Inputs and settings

Describe the subject, one main action and camera movement in prompt. Choose duration, resolution and aspect_ratio from the current schema before requesting a quote.

prompt_expansion_mode controls whether the prompt is rewritten. When comparing your own instructions, keep the same expansion setting and record any expanded prompt returned with the result.

An optional target_audio_url can supply a soundtrack. Review the supported file constraints and video duration first; listen for trimming, silence or a mismatch with the visual action.