> ## 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.

# HappyHorseImageToVideoApi - ComfyUI Built-in Node Documentation

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

## Overview

This node generates a short video from a single starting image using the HappyHorse model. You provide a first frame image and a text prompt describing the desired motion and scene, and the node creates a video that continues from that image.

## Inputs

| Parameter          | Description                                                                                     | Data Type | Required | Range                   |
| ------------------ | ----------------------------------------------------------------------------------------------- | --------- | -------- | ----------------------- |
| `model`            | The HappyHorse model to use for video generation.                                               | COMBO     | Yes      | `"happyhorse-1.0-i2v"`  |
| `model.prompt`     | Prompt describing the elements and visual features. Supports English and Chinese. (default: "") | STRING    | No       | N/A                     |
| `model.resolution` | The output video resolution. (default: "720P")                                                  | COMBO     | Yes      | `"720P"`<br />`"1080P"` |
| `model.duration`   | The duration of the generated video in seconds. (default: 5)                                    | INT       | Yes      | 3 to 15                 |
| `first_frame`      | First frame image. The output aspect ratio is derived from this image.                          | IMAGE     | Yes      | N/A                     |
| `seed`             | Seed to use for generation. (default: 0)                                                        | INT       | No       | 0 to 2147483647         |
| `watermark`        | Whether to add an AI-generated watermark to the result. (default: False)                        | BOOLEAN   | No       | True / False            |

## Outputs

| Output Name | Description               | Data Type |
| ----------- | ------------------------- | --------- |
| `video`     | The generated video file. | 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/HappyHorseImageToVideoApi/en.md)

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