ComfyUI Node
Superside MiniMax H3 Extend Video
MiniMax H3 Extend Video on fal. Returns a native VIDEO plus the URL, so SaveVideo or PreviewVideo connects straight in. Endpoints: h3 max - minimax/h3-max/extend-video h3 max turbo - minimax/h3-max-turbo/extend-video fal price (2026-10-30): h3-max: Billing is calculated per second of generated video, plus reference input charges beyond the included allowance. Video costs $0.05 per second at 480p, $0.08 per second at 768p, $0.16 per second at 1080p, and $0.32 per second at 2K. | h3-max-turbo: Billing is calculated per second of newly generated video. Your request will cost $0.025 per second at 480p, $0.04 per second at 768p, $0.08 per second at 1080p, and $0.16 per second at 2K.
Superside MiniMax H3 Extend Video
- video_url
- video
- video_url
◄modelh3 max►
◄prompt►
◄api_key►
◄outputextended►
◄duration5.00►
◄seed0►
◄aspect_ratioauto►
◄reference_audio_urls►
◄enable_prompt_expansiontrue►
◄enable_safety_checkertrue►
◄resolution768P►
CategorySuperside
Inputs (12)
| Name | Type | Default | Description |
|---|---|---|---|
| model | COMBO | h3 max | Which endpoint to call. These share one control surface and differ in quality, speed and price: h3 max - minimax/h3-max/extend-video h3 max turbo - minimax/h3-max-turbo/extend-video |
| prompt | STRING | What happens next. Describe the continuation, not the source. | |
| video_url | 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. | |
| api_key | STRING | — | |
| outputopt | COMBO | extended | '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. |
| durationopt | FLOAT | 5.000.71–15 | 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. |
| seedopt | INT | 0-1–2147483647 | Seed for the continuation. Random when omitted. -1 = let the model choose. |
| aspect_ratioopt | COMBO | auto | Output aspect ratio. 'auto' follows the source video. Other values crop the video to fit the selected ratio. |
| reference_audio_urlsopt | STRING | 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. Assign each clip a role in the prompt, such as 'Audio 1 for the voice' and 'Audio 2 for background music'. One URL per line. | |
| enable_prompt_expansionopt | BOOLEAN | true | Automatically enhance the prompt using the source video to help keep the continuation consistent. May increase processing time. |
| enable_safety_checkeropt | BOOLEAN | true | Moderate the source video and the prompt. |
| resolutionopt | COMBO | 768P | Output video resolution. |
Outputs (2)
| Name | Type | Description |
|---|---|---|
| video | VIDEO | — |
| video_url | STRING | — |