H3 Max Extend Video

Edits a video you give it

Liveby Minimax

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.

Ask your agent

Say it in your own words. Your agent picks this tool, fills in the details and brings back the answer.

Use H3 Max Extend Video to make this clip look like it was shot at night.

Change the background of this video to a beach.

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How it works

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Pay only when it worksEach use comes out of your balance. If it fails, you aren't charged.

For developersSummary, tool id, API call and input schema

Video API by Minimax, callable through Superpowers. It costs $0.270 per 5s clip, charged only when the call succeeds. Call it with one API key: POST /v1/run with "tool": "fal.minimax-h3-max-extend-video", or over MCP with run_tool.

Tool id
Price per call: $0.270 / 5s clip

Call it

Also over MCP as run_tool

curl -X POST https://superpowers.tools/v1/run \
  -H 'Authorization: Bearer $SP_KEY' \
  -d '{"tool":"fal.minimax-h3-max-extend-video","input":{"video_url":"","prompt":""},"idempotency_key":"example-request-1"}'

Input

10 fields · 2 required

{
  "type": "object",
  "required": [
    "video_url",
    "prompt"
  ],
  "properties": {
    "aspect_ratio": {
      "type": "string",
      "description": "Output aspect ratio. 'auto' follows the source video. Other values crop the video to fit the selected ratio.",
      "default": "auto",
      "enum": [
        "auto",
        "21:9",
        "16:9",
        "4:3",
        "1:1",
        "3:4",
        "9:16"
      ]
    },
    "enable_prompt_expansion": {
      "type": "boolean",
      "description": "Automatically enhance the prompt using the source video to help keep the continuation consistent. May increase processing time.",
      "default": true
    },
    "reference_audio_urls": {
      "type": "array",
      "description": "Optional audio references for the continuation (2–15 seconds each, 15 seconds combined). The full extended video retains its original source soundtrack, and its ending still conditions the transition. These clips guide the newly generated audio instead of using that soundtrack as an audio reference."
    },
    "output": {
      "type": "string",
      "description": "'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.",
      "default": "extended",
      "enum": [
        "extended",
        "continuation"
      ]
    },
    "video_url": {
      "type": "string",
      "description": "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."
    },
    "duration": {
      "type": "number",
      "description": "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.",
      "default": 5
    },
    "prompt": {
      "type": "string",
      "description": "What happens next. Describe the continuation, not the source."
    },
    "seed": {
      "type": "integer",
      "description": "Seed for the continuation. Random when omitted."
    },
    "enable_safety_checker": {
      "type": "boolean",
      "description": "Moderate the source video and the prompt.",
      "default": true
    },
    "resolution": {
      "type": "string",
      "description": "Output video resolution.",
      "default": "768P",
      "enum": [
        "480P",
        "768P",
        "1080P",
        "2K"
      ]
    }
  }
}