Veo 3.1 ComfyUI Nodes

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

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

1. Get an API key from MuAPI
2. 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
extra_params_json	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
image_1 … image_4	Reference images (up to 4)
generate_audio	Whether to generate audio (default: true)

Extend / 4K Upscale

Parameter	Description
request_id	request_id output from a previous generation node

Example Workflows

File	Description
MuAPI_Veo31_T2V_Example.json	Text → Video → Save
MuAPI_Veo31_I2V_Example.json	Image → Video → Save
MuAPI_Veo31_Reference_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