MiniMax H3: ComfyUI Workflow Examples

• Text-to-Video (T2V): Generate videos from text prompts
• Image-to-Video (I2V): Generate videos from an input image, with optional first/last-frame control
• Reference-to-Video (R2V): Generate videos that lock in a character, style, motion, camera move, or voice from reference images, videos, and audio

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Key features

• Native stereo audio: Dialogue, sound effects, and music are generated together with the video, synced in one MP4
• Multimodal context: Text, images, video, and audio references can be combined in one generation
• Reference-driven generation: Lock a character’s identity, a style, a motion, a camera move, or a voice from reference materials
• Instruction following: Describe the relationship between references and the target shot in natural language
• Accurate text rendering: Spelled-out text and brand elements render cleanly
• Open weights: Run locally in ComfyUI with full control over every parameter

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Getting started

1. Update ComfyUI to version 0.30.0 or later
2. Go to Template Library > Video > choose any MiniMax H3 workflow
3. Follow the pop-up to download models and run the workflow

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Setting the output resolution

• Aspect ratio: Pick a preset such as 16:9 (Widescreen), 9:16 (Portrait Widescreen), or 1:1 (Square)
• Megapixels: Target total pixel count for the output. Higher values give larger frames; lower values run faster
• Multiple: The computed resolution is rounded to the nearest multiple of this number. Keep it at 32 to match H3’s resolution grid

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ComfyUI Native Workflows

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MiniMax H3 Text to Video (T2V)

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Model downloads

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Model storage

ComfyUI/
├── 📂 models/
│   ├── 📂 diffusion_models/
│   │   └── minimax_h3_fl2va_pruned_int8_convrot.safetensors
│   ├── 📂 text_encoders/
│   │   └── qwen3vl_32b_minimax_h3_int8_convrot.safetensors
│   └── 📂 vae/
│       ├── minimax_h3_video_vae_fp16.safetensors
│       └── minimax_h3_audio_vae_fp32.safetensors

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Prompting tips

1. Describe the whole scene: State the overall scene first (location, character, what is happening), then break it into timed shots
2. Shots, camera, and audio: Describe the shots, camera moves, and the accompanying audio (dialogue, SFX, music) in one prompt block
3. Resolution: H3’s native canvas is a 768px short edge, capped at 768x1344 pixels and rounded to a multiple of 32
4. Duration: The duration input snaps to the model’s 17-frame-per-block (17k+5) grid at 24fps
5. First/last frame: Connect images to first_frame and/or last_frame on the MiniMaxH3ImageToVideo node to turn this workflow into first/last-frame image-to-video

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MiniMax H3 Image to Video (I2V)

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Model downloads

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Model storage

ComfyUI/
├── 📂 models/
│   ├── 📂 diffusion_models/
│   │   └── minimax_h3_fl2va_pruned_int8_convrot.safetensors
│   ├── 📂 text_encoders/
│   │   └── qwen3vl_32b_minimax_h3_int8_convrot.safetensors
│   └── 📂 vae/
│       ├── minimax_h3_video_vae_fp16.safetensors
│       └── minimax_h3_audio_vae_fp32.safetensors

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Prompting tips

1. Keyframes: The first_frame and last_frame inputs are optional; the model generates the motion between them
2. Prompt: Describe the shots, motion, and the accompanying audio (dialogue, SFX, music) in one block
3. Resolution: H3’s native canvas is a 768px short edge, capped at 768x1344 pixels and rounded to a multiple of 32
4. Duration: The duration input snaps to the model’s 17-frame-per-block (17k+5) grid at 24fps

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MiniMax H3 Reference to Video (R2V)

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Model downloads

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Model storage

ComfyUI/
├── 📂 models/
│   ├── 📂 diffusion_models/
│   │   └── minimax_h3_ref2va_pruned_int8_convrot.safetensors
│   ├── 📂 text_encoders/
│   │   └── qwen3vl_32b_minimax_h3_int8_convrot.safetensors
│   └── 📂 vae/
│       ├── minimax_h3_video_vae_fp16.safetensors
│       └── minimax_h3_audio_vae_fp32.safetensors

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Prompting tips

1. Reference by tag: Reference each input by tag in the exact order it was connected, for example <Picture 1>, <Video 1>, <Audio 1>
2. Assign each reference a job: State which reference drives which part of the shot (identity, style, motion, camera, voice). Explicit assignments tend to work much better
3. Limits: Up to 9 reference images, 3 reference videos (each can carry its own soundtrack), and 3 standalone reference audio clips
4. ref_image_size: match scales references down to the generation resolution for speed; max keeps up to a 2048px short edge for stronger identity fidelity at the cost of speed
5. Sampler: res_multistep with a beta or normal scheduler tends to outperform simple for reference-heavy prompts
6. Note: R2V uses the ref2va diffusion model, a different set of weights from the fl2va model used by the T2V and I2V workflows