> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-chore-sync-comfy-api-v2-spec.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# FLUX Video Upscale: AI video upscaling to 4K in ComfyUI

> Upscale videos to 1080p, 2K, or 4K with the FLUX Video Upscale partner node in ComfyUI. Precise mode preserves faces and products; creative mode adds new detail to generated footage.

FLUX Video Upscale is Black Forest Labs' FLUX 3 powered super-resolution tool for video, available in ComfyUI as a partner node. It upscales clips to 1080p, 2K, or 4K while keeping the source aspect ratio and its audio track.

## What FLUX Video Upscale is good at

* **Upscale to 4K**: Raises video resolution to 1080p, 2K, or 4K in a single API call
* **Two modes**: Precise mode preserves the source exactly; creative mode restores and invents fine detail
* **Audio preserved**: The output keeps the source clip's audio track
* **Up to 20 seconds**: Accepts clips up to 20 seconds at up to 2560x1440 source resolution

## Example outputs

Upscaling an existing clip while keeping its aspect ratio and audio track:

<video controls className="w-full aspect-video" src="https://raw.githubusercontent.com/Comfy-Org/workflow_templates/main/output/api_bfl_flux_video_upscale.mp4" />

## Use it in ComfyUI

<Card title="FLUX Video Upscale workflow" icon="diagram-project" href="/tutorials/partner-nodes/black-forest-labs/flux-video-upscale/workflow">
  Run the video upscaling workflow in ComfyUI, locally or on Comfy Cloud
</Card>