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# EmptyHunyuanVideo15Latent - ComfyUI Built-in Node Documentation

> Complete documentation for the EmptyHunyuanVideo15Latent node in ComfyUI. Learn its inputs, outputs, parameters and usage.

This node creates an empty latent tensor specifically formatted for use with the HunyuanVideo 1.5 model. It generates a blank starting point for video generation by allocating a tensor of zeros with the correct channel count and spatial dimensions for the model's latent space.

## Inputs

| Parameter    | Description                                                      | Data Type | Required | Range |
| ------------ | ---------------------------------------------------------------- | --------- | -------- | ----- |
| `width`      | The width of the video frame in pixels.                          | INT       | Yes      | -     |
| `height`     | The height of the video frame in pixels.                         | INT       | Yes      | -     |
| `length`     | The number of frames in the video sequence.                      | INT       | Yes      | -     |
| `batch_size` | The number of video samples to generate in a batch (default: 1). | INT       | No       | -     |

**Note:** The spatial dimensions of the generated latent tensor are calculated by dividing the input `width` and `height` by 16. The temporal dimension (frames) is calculated as `((length - 1) // 4) + 1`.

## Outputs

| Output Name | Description                                                                                                                                                                                                                    | Data Type |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------- |
| `samples`   | An empty latent tensor with dimensions suitable for the HunyuanVideo 1.5 model. The tensor has a shape of `[batch_size, 32, frames, height//16, width//16]`. The output also includes a `downscale_ratio_spacial` value of 16. | LATENT    |

> 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/EmptyHunyuanVideo15Latent/en.md)

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