Contents

Part 1. Prerequisites Before Video Upscaling in ComfyUI
Part 2. ComfyUI Video Upscale Workflow
Part 3. Recommended Models and Nodes
Part 4. The Easiest Alternative to ComfyUI Video Upscaler
Part 5. FAQs of ComfyUI Video Upscaler

A Complete Guide to Mastering ComfyUI Video Upscaler

Q: Is there a dedicated ComfyUI video upscaler?

No. There is no single ComfyUI video upscaler. This node-based workflow handles diverse open-source image and video processing models. It realizes video upscaling by splitting footage into separate frames, processing each frame individually, then merging enhanced frames back into a complete video.

Q: Where to put the upscale model in ComfyUI?

Store upscale models inside the fixed directory ComfyUI/models/upscale_models/. Navigate to your root ComfyUI installation folder, access this subdirectory and place all upscaler model files here for normal loading and use.

Q: Can 720p be upscaled to 4K?

Yes, 720p footage can be perfectly upscaled to 4K resolution. Ordinary users can use professional AI video upscaling tools such as Aiseesoft Video Converter Ultimate for fast high-definition enhancement. Advanced users familiar with ComfyUI can upscale 720p to 1080p via 4x-UltraSharp first, then adopt ControlNet Tile module to reach standard 4K definition.

May 26, 2026Louisa White

Edit Video & AI Tools

If you often work with Stable Diffusion or AnimateDiff to generate videos, you may know the struggle: The outputs are at a low resolution, like 480p or 720p. This makes them a blurry mess on social media or 4K displays. The truth is, in the current video creation world, 4K delivery is the standard. To deal with the low-resolution footage, related upscaling solutions are brought to increase resolution, refine details, and achieve professional quality.

ComfyUI is a famous node-based workflow that allows you to upscale videos with various open-source models. This article explains the prerequisites of ComfyUI, the best upscaling models, and the easiest alternative in case you prefer to skip the node-based complexity.

Part 1. Prerequisites Before Video Upscaling in ComfyUI

Before we delve into the specific ComfyUI video upscale workflow, ensure your ComfyUI environment is properly equipped. ComfyUI is not a dedicated tool that comes with direct upscaling functions. You need to collect all the necessary tools first.

1. Install ComfyUI manager. You should install custom nodes directly from the interface. Also, you can choose to search for them on GitHub.

2. For video upscaling, you can turn to ControlNet or AnimateDiff. They have specific ControlNet models for you to upscale videos.

3. Apart from them, you need video-handling nodes like ComfyUI-VideoHelperSuite (VHS). These nodes are used to load, combine, and export video files within ComfyUI.

4. Based on the upscaling model, you also need specific nodes for further enhancements, such as the RIFE for Frame Interpolation.

Part 2. ComfyUI Video Upscale Workflow

There are many ways to upscale a video in the ComfyUI workflow. This section gives a step-by-step guide to structuring the workflow.

Step 1.

Start with a VHS_LoadVideo node to load your low-resolution video. You can get the metadata information of the source, like frame rate.

Step 2.

Once the raw video is loaded, you can use an ImageUpscaleWithModel node to avoid amplifying compression artifacts. To upscale the resolution, use a RealESRGAN model like RealESRGAN_x2. It can quickly double or quadruple the original resolution.

Step 3.

The upscaled frames will then be passed into a sophisticated node, such as UltimateSDUpscaleNoUpscale. The node runs a diffusion model and processes the image in tiles. During the process, it will add high-frequency detail and increase sharpness.

Step 4.

You can get the source frame rate once loaded. To generate a smoother motion, you are suggested to perform frame interpolation after increasing the resolution. As mentioned, you can rely on RIFE (Real-Time Intermediate Flow Estimation) nodes. Double or quadruple the frame rate to make your video smoother.

Step 5.

Finally, you need a VHS_VideoCombine node to compile the upscaled frames into one file and then export it.

Part 3. Recommended Models and Nodes

You should select the right model based on your source material and goal.

For the best possible quality and maximum accuracy, you can use SeedVR2. It can significantly improve clarity while preserving the original structure.

For AI-generated videos or low-detail sources, Topaz Astra (Starlight) Creative is an excellent choice for handling various AI artifacts.

If you want to quickly upscale a video, FlashVSR is one of the fastest options.

Besides models, there are some key nodes you should know, including Topaz Video Enhance, SeedVR2 Video Upscaler, and RIFE VFI.

Part 4. The Easiest Alternative to ComfyUI Video Upscaler

ComfyUI is powerful, but it requires a steep learning curve. The video upscaling workflow is not suitable for most casual users. It demands a willingness to troubleshoot broken nodes and learn related skills. If you only want to upscale videos, ComfyUI will take you too much unnecessary time. The easiest alternative to ComfyUI is dedicated video upscaler software like Aiseesoft Video Converter Ultimate.

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Why Choose Aiseesoft?

Unlike the complex ComfyUI, Aiseesoft offers a streamlined solution for upscaling and other enhancements. It is mainly designed for users who want a one-click way to get professional results. Its AI Enhancer uses advanced technology to increase resolution to 1080p, 4K, 5K, or even 8K with enhanced quality. The AI will automatically improve clarity, reduce noise, sharpen edges, correct colors, and do other suitable optimizations.

How to Upscale a Video Using AI

Step 1.

Open Aiseesoft Video Converter Ultimate and click the AI Enhancer tab. Load your video file by clicking the Add File(s) button.

Step 2.

Multiple commonly used AI enhancement models are listed on the right. You can select the suitable one to deal with your video issue. If you only want to increase resolution, start with the General Enhancement Model.

Step 3.

Click the Preview button to confirm that the output quality suits your needs. Choose your preferred upscaling level from Output Resolution. Then, click Export All to save the upscaled video on your computer.

Part 5. FAQs of ComfyUI Video Upscaler

Question 1. Is there a dedicated ComfyUI video upscaler?

No. There is no single ComfyUI video upscaler. As mentioned above, this node-based workflow is designed to handle various open-source image/video processing models. ComfyUI can upscale by breaking a video into individual images (frames), upscaling them one by one, and then reassembling them into a new video file.

Question 2. Where to put the upscale model in ComfyUI?

To make your upscale models work in ComfyUI, you need to place them in a specific subfolder under your directory. The primary folder is “ComfyUI/models/upscale_models/”. You can go to your main ComfyUI installation folder to locate it. When you get there, put your upscaler files.

Question 3. Can 720p be upscaled to 4K?

Yes, you can absolutely upscale 720p to 4K. For most casual users, you can turn to a dedicated AI video upscaler like Aiseesoft Video Converter Ultimate to perform the upscaling. The AI is trained on millions of files to ensure high-quality outputs. If you often deal with various models and are familiar with ComfyUI, you can rely on the workflow to upscale the source video to 1080p first with a model like 4x-UltraSharp, and then use ControlNet Tile to get 4K.

Conclusion

This article guides you to know the node-based workflow of ComfyUI video upscale. If you need granular control over every step and want to use all types of open-source models, you can choose ComfyUI. Otherwise, turn to the recommended Aiseesoft AI upscaler for quick fixes or enhancements.