ComfyUI SeedVR2 Introduction

SeedVR2 (arXiv:2506.05301, from ByteDance Seed) is a one-step diffusion-based video restoration model. It performs adversarial training against real data to restore and upscale images and videos with high fidelity. SeedVR2 is natively supported in ComfyUI (PR #14424). Key capabilities:

Conservative upscaling: preserves original structure and detail while enhancing clarity
One-step inference: single forward pass for both image and video upscaling
Multiple model sizes: 3B and 7B variants with FP16, FP8, INT8, NVFP4, and MXFP8 quantizations
Both image and video: supports single-image upscaling and video resolution enhancement

SeedVR2 comes in two sizes. The 3B model is a smaller variant with lower VRAM requirements, suitable for users with limited hardware. The 7B model is a larger variant that delivers higher quality results at the cost of increased VRAM and processing time. Both are available under the Apache 2.0 license.

Local users
Cloud users

Make sure your ComfyUI is updated.

Workflows in this guide can be found in the Workflow Templates. If you can’t find them in the template, your ComfyUI may be outdated.If nodes are missing when loading a workflow, possible reasons:

You are not using the latest ComfyUI version (Nightly version)
Some nodes failed to import at startup

Model Installation

Download the SeedVR2 checkpoint(s) from the Comfy-Org SeedVR2 repository and save them to the corresponding ComfyUI folder:

seedvr2_3b_fp16.safetensors: 3B FP16 base model, lower VRAM requirement
seedvr2_3b_fp8_e4m3fn.safetensors: 3B FP8 quantized, further reduced VRAM
seedvr2_3b_int8_convrot.safetensors: 3B INT8 with convrot
seedvr2_7b_fp16.safetensors: 7B FP16 base model, higher quality
seedvr2_7b_fp8_e4m3fn.safetensors: 7B FP8 quantized, balance of quality and VRAM
seedvr2_7b_int8_convrot.safetensors: 7B INT8 with convrot
seedvr2_7b_sharp_fp16.safetensors: 7B FP16 sharp variant for enhanced detail
seedvr2_ema_vae_fp16.safetensors: VAE checkpoint (shared across all model variants)

Place the files in the following directories:

ComfyUI/
├── models/
│   ├── diffusion_models/
│   │   ├── seedvr2_3b_fp16.safetensors
│   │   ├── seedvr2_3b_fp8_e4m3fn.safetensors
│   │   ├── seedvr2_3b_int8_convrot.safetensors
│   │   ├── seedvr2_7b_fp16.safetensors
│   │   ├── seedvr2_7b_fp8_e4m3fn.safetensors
│   │   ├── seedvr2_7b_int8_convrot.safetensors
│   │   ├── seedvr2_7b_sharp_fp16.safetensors
│   └── vae/
│       └── seedvr2_ema_vae_fp16.safetensors

Example Workflows

SeedVR2 3B Int8: Upscale Image

Upscale images using SeedVR2 3B Int8, a one-step diffusion-based video restoration model that produces high-quality results with improved temporal consistency. SeedVR2 3B Int8 upscale image workflow preview

Run on Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search “SeedVR2 3B Int8: Upscale Image” in Template Library

Input materials Upload this file to the matching LoadImage node:

watch_macro_shot.png

LoadImage node 1 · watch_macro_shot.png

Example output

1.1 Steps to Run

Place your image in the ComfyUI/input/ folder and select it in the Load Image node
Select the seedvr2_3b_int8_convrot.safetensors checkpoint in the SeedVR2 model loader
Click Queue or use Ctrl(cmd) + Enter to run

SeedVR2 7B Int8: Upscale Image

Upscale images using SeedVR2 7B Int8, a one-step diffusion model that enhances resolution through adversarial training and adaptive window attention. SeedVR2 7B Int8 upscale image workflow preview

Run on Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search “SeedVR2 7B Int8: Upscale Image” in Template Library

Input materials Upload this file to the matching LoadImage node:

indoor_portrait.png

LoadImage node 1 · indoor_portrait.png

Example output

2.1 Steps to Run

Place your image in the ComfyUI/input/ folder and select it in the Load Image node
Select the seedvr2_7b_int8_convrot.safetensors checkpoint in the SeedVR2 model loader
Click Queue or use Ctrl(cmd) + Enter to run

SeedVR2 3B Int8: Upscale Video

Upscale and restore video footage using SeedVR2 3B Int8, a one-step diffusion model that enhances resolution while maintaining temporal consistency across frames. SeedVR2 3B Int8 upscale video workflow preview

Run on Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search “SeedVR2 3B Int8: Upscale Video” in Template Library

Input materials Upload this file to the matching LoadVideo node:

grainy_perfume_shot_crf32.mp4

LoadVideo node 73 · grainy_perfume_shot_crf32.mp4

Example output

3.1 Steps to Run

Place your video in the ComfyUI/input/ folder and select it in the Load Video node
Select the seedvr2_3b_int8_convrot.safetensors checkpoint in the SeedVR2 model loader
Click Queue or use Ctrl(cmd) + Enter to run

Performance

Higher target resolutions require more processing time. The INT8 variant provides efficient inference with reduced VRAM usage compared to FP16.

Community Resources

SeedVR2 Project Page: Official project website
ByteDance SeedVR Codebase (GitHub): Original research code and paper
Comfy-Org/SeedVR2 (HuggingFace): Official ComfyUI model weights
ByteDance-Seed/SeedVR2-3B (HuggingFace): Original 3B model weights
ByteDance-Seed/SeedVR2-7B (HuggingFace): Original 7B model weights
Paper (arXiv)

Get Started

Agent Tools

Basic Concepts

Interface Guide

Tutorials

Partner Nodes

SeedVR2: Image and video upscaling in ComfyUI

ComfyUI SeedVR2 Introduction

Model Installation