> ## 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.

# ARVideoI2V - ComfyUI Built-in Node Documentation

> Complete documentation for the ARVideoI2V node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> 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/ARVideoI2V/en.md)

## Overview

This node prepares an image-to-video generation setup for AR (Auto-Regressive) video models. It takes a starting image, encodes it into the latent space using a VAE, and stores the encoded image in the model's configuration. This allows the video sampling process to use the image as the first frame, effectively seeding the generation without needing a separate image-to-video model architecture.

## Inputs

| Parameter     | Data Type | Required | Range                 | Description                                                                  |
| ------------- | --------- | -------- | --------------------- | ---------------------------------------------------------------------------- |
| `model`       | MODEL     | Yes      | -                     | The AR video model to be used for generation.                                |
| `vae`         | VAE       | Yes      | -                     | The VAE model used to encode the starting image into latent space.           |
| `start_image` | IMAGE     | Yes      | -                     | The initial image that will serve as the first frame of the generated video. |
| `width`       | INT       | Yes      | 16 to 8192 (step: 16) | The width of the generated video frames (default: 832).                      |
| `height`      | INT       | Yes      | 16 to 8192 (step: 16) | The height of the generated video frames (default: 480).                     |
| `length`      | INT       | Yes      | 1 to 1024 (step: 4)   | The total number of frames in the generated video (default: 81).             |
| `batch_size`  | INT       | Yes      | 1 to 64               | The number of video sequences to generate in a single batch (default: 1).    |

## Outputs

| Output Name | Data Type | Description                                                                                     |
| ----------- | --------- | ----------------------------------------------------------------------------------------------- |
| `MODEL`     | MODEL     | The cloned model with the encoded start image stored in its configuration for video generation. |
| `LATENT`    | LATENT    | An empty latent tensor with the correct dimensions for the video generation process.            |

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