Veo 3.1 ComfyUI Nodes

ComfyUI custom nodes for generating videos with Google's Veo 3.1 model via the MuAPI platform.

Related Projects

Veo 3 on MuAPI — Model landing page for Veo generation.
Veo 3 text-to-video playground — Try the model directly in the browser.
veo4-video-generator — Ready-made Next.js SaaS for Veo — no ComfyUI needed
Veo-4-API — Python wrapper for Veo 4 API — use the latest Veo model in scripts
muapi-comfyui — ComfyUI nodes for 100+ MuAPI models including Veo
awesome-ai-video-models — compare AI video models by API, price & speed

Nodes

| Node | Description | |------|-------------| | 🎬 Veo 3.1 Text to Video | Generate 8-second video from a text prompt | | 🎬 Veo 3.1 Image to Video | Animate a static image; optionally anchor the last frame | | 🎬 Veo 3.1 Reference to Video | Generate video guided by up to 4 reference images | | 🎬 Veo 3.1 Extend Video | Continue a previous generation with a new prompt | | 🎬 Veo 3.1 4K Upscale | Upscale any previous Veo 3.1 generation to 4K | | 🎬 Veo 3.1 Save Video | Download & save generated video; returns frames tensor |

All nodes live in the 🎬 Veo 3.1 category in the ComfyUI node menu.

Available Models

Text to Video

| Model | Speed | Quality | |-------|-------|---------| | veo3.1-text-to-video | Standard | Highest, with audio | | veo3.1-fast-text-to-video | Fast | Good | | veo3.1-lite-text-to-video | Fast | Lightweight |

Image to Video

| Model | Speed | Quality | |-------|-------|---------| | veo3.1-image-to-video | Standard | Highest, with audio | | veo3.1-fast-image-to-video | Fast | Good | | veo3.1-lite-image-to-video | Fast | Lightweight |

Other Variants

veo3.1-reference-to-video — multi-image reference generation
veo3.1-extend-video — extend a previous generation
veo3.1-4k-video — upscale a previous generation to 4K

All models output 8-second videos (Veo 3.1 fixed duration).

Installation

cd ComfyUI/custom_nodes
git clone https://github.com/YOUR_USERNAME/muapi-veo31-comfyui
pip install -r muapi-veo31-comfyui/requirements.txt

Restart ComfyUI.

Setup

Get an API key from MuAPI
Paste it into the api_key field of any Veo 3.1 node

Parameters

Common

| Parameter | Description | |-----------|-------------| | api_key | Your MuAPI API key | | prompt | Text description of the video | | aspect_ratio | 16:9 or 9:16 | | resolution | 720p, 1080p, or 4k | | extraparamsjson | Any additional model parameters as JSON |

Image to Video extras

| Parameter | Description | |-----------|-------------| | image | Start frame (IMAGE tensor) | | last_image | Optional end frame for first–last mode |

Reference to Video extras

| Parameter | Description | |-----------|-------------| | image1 … image4 | Reference images (up to 4) | | generate_audio | Whether to generate audio (default: true) |

Extend / 4K Upscale

| Parameter | Description | |-----------|-------------| | requestid | requestid output from a previous generation node |

Example Workflows

| File | Description | |------|-------------| | MuAPIVeo31T2V_Example.json | Text → Video → Save | | MuAPIVeo31I2V_Example.json | Image → Video → Save | | MuAPIVeo31Reference_Example.json | 2 reference images → Video → Save |

Load any workflow via ComfyUI → Load (drag & drop the JSON).

Chaining nodes

Veo31TextToVideo
  └─ video_url  ──► Veo31VideoSaver ──► frames ──► PreviewImage
  └─ first_frame──► PreviewImage
  └─ request_id ──► Veo31ExtendVideo
                       └─ request_id ──► Veo314KUpscale

Requirements

Python 3.8+
ComfyUI (any recent version)
requests, Pillow, numpy, torch, opencv-python

License

MIT

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