> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-mintlify-b90d3c69.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Astra 2 - Creative diffusion video upscaling

> What Astra 2 does for your videos in ComfyUI, plus creative upscaling with control over detail and style.

Enhanced creative upscaling for GenAI video, with advanced control over detail and style.

## What is Astra 2?

**If you're new here:** Astra 2 targets **AI-generated and stylized video**. Plain upscaling mostly enlarges and sharpens existing pixels; Astra 2 can **add plausible new detail and texture** where the source is soft, so the clip feels richer—not only bigger.

## Model overview

It builds on Astra 1 with clearer control over how detail and stylization are produced (creativity, sharpness, optional **descriptive** prompts—not step lists). Strong fits: stylized/GenAI footage, wides and sparse-detail scenes, and footage that looks overly smooth until texture is restored.

## Key capabilities

* **Adds texture and detail** — Not only sharpening.
* **Steerable look** — Creativity, sharpness, optional prompt guidance.
* **Stylized & wides** — Where inferred detail matters.

## In ComfyUI

Use **Topaz Video Enhance**. **Topaz Video Enhance (Legacy)** does not offer **Astra 2**. Set upscaler to **Astra 2**, resolution to **FullHD** or **4K**; input must be **MP4**.

Optional **Prompt**: max **450** frames (\~15 s @ 30 fps). Empty prompt: up to **9000** frames. Expand advanced controls for **Sharp** and **Realism** when needed.

<Tip>
  To use the Partner Nodes, you need to ensure that you are logged in properly and using a permitted network environment. Please refer to the [Partner Nodes Overview](/tutorials/partner-nodes/overview) section of the documentation to understand the specific requirements for using the Partner Nodes.
</Tip>

<Tip>
  <Tabs>
    <Tab title="Portable or self deployed users">
      Make sure your ComfyUI is updated.

      * [Download ComfyUI](https://www.comfy.org/download)
      * [Update Guide](/installation/update_comfyui)

      Workflows in this guide can be found in the [Workflow Templates](/interface/features/template).
      If you can't find them in the template, your ComfyUI may be outdated. (Desktop version's update will delay sometime)

      If nodes are missing when loading a workflow, possible reasons:

      1. You are not using the latest ComfyUI version (Nightly version)
      2. Some nodes failed to import at startup
    </Tab>

    <Tab title="Desktop or Cloud users">
      * The Desktop is base on ComfyUI stable release, it will auto-update when there is a new Desktop stable release available.
      * [Cloud](https://cloud.comfy.org) will update after ComfyUI stable release.

      So, if you find any core node missing in this document, it might be because the new core nodes have not yet been released in the latest stable version. Please wait for the next stable release.
    </Tab>
  </Tabs>
</Tip>

## Example workflow

**Load Video** → **Topaz Video Enhance** → **Save Video**. After opening the template, pick **Astra 2** on the upscaler if another preset is selected.

<Card title="Run on Comfy Cloud" icon="cloud" href="https://cloud.comfy.org/?template=api_topaz_astra2&utm_source=docs">
  Open the workflow instantly on Comfy Cloud.
</Card>

<Card title="Download workflow" icon="download" href="https://github.com/Comfy-Org/workflow_templates/blob/main/templates/api_topaz_astra2.json">
  Download the workflow JSON for local ComfyUI.
</Card>

## Related

* [Video upscaling in ComfyUI](/tutorials/utility/video-upscale) — guidance on choosing an upscaling approach.