> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# ClarityCrystalVideoUpscaleNode - ComfyUI Built-in Node Documentation

> Upscale a video with Clarity AI's Crystal Video Upscaler, a high-fidelity upscaler that stays faithful to the source.

Upscale a video with Clarity AI's Crystal Video Upscaler, a high-fidelity upscaler that stays faithful to the source. The clip is uploaded, upscaled by the factor you set, and returned as a video. The source clip is limited to 9 megapixels per frame (for example 4000x2250) and to 360 megapixel-seconds per clip. A clip that exceeds either limit is rejected with a `ValueError` instead of being upscaled less. The only automatic reduction is on the output side: the factor is lowered when it would push a side of the result past 5120 pixels.

Selecting a `model` reveals the parameters specific to that model.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| - | - | - | - | - |
| `model` | Model to use. Selecting a model reveals the parameters specific to it: `video` and `scale_factor`. | DYNAMIC\_COMBO | Yes | `"crystal-video-upscaler"` |
| `video` | The video to upscale. | VIDEO | Yes | N/A |
| `scale_factor` | Factor to multiply the video width and height by. The factor is lowered automatically when it would push a side of the output past 5120 pixels. A source frame over 9 megapixels or a clip past the 360 megapixel-second budget is rejected with an error instead of being upscaled less (default: 2.0). | FLOAT | Yes | 1.0 to 200.0 (step 0.1) |

**Note:** The source clip may be at most 5120 pixels on each side and at most 9 megapixels per frame. The maximum length depends on the frame size and frame rate: it is 360 megapixel-seconds divided by the frame pixels and by `ceil(fps / 30)`, the 30-fps cost multiplier, so a 1080p clip at 30 fps can run up to about 173 seconds. Clips above 30 fps cost 2x, above 60 fps 3x, and so on.

## Outputs

| Output Name | Description | Data Type |
| - | - | - |
| `video` | The upscaled video. | VIDEO |

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/ClarityCrystalVideoUpscaleNode/en.md)

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