> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-chore-sync-comfy-api-v2-spec.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# HappyHorseImageToVideoApi - ComfyUI Built-in Node Documentation

> This node generates a short video from a single starting image using the HappyHorse model.

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

### Common Inputs

| Parameter     | Description                                                                               | Data Type      | Required | Range                                              |
| ------------- | ----------------------------------------------------------------------------------------- | -------------- | -------- | -------------------------------------------------- |
| `model`       | The HappyHorse model to use for video generation.                                         | DYNAMIC\_COMBO | Yes      | `"happyhorse-1.1-i2v"`<br />`"happyhorse-1.0-i2v"` |
| `first_frame` | First frame image. The output aspect ratio is derived from this image.                    | IMAGE          | Yes      | 300×300 px min; 1:2.5 to 2.5:1                     |
| `seed`        | Seed to use for generation. (default: 0)                                                  | INT            | Yes      | 0 to 2147483647                                    |
| `watermark`   | Whether to add an AI-generated watermark to the result. (advanced option; default: False) | BOOLEAN        | Yes      | True / False                                       |

### happyhorse-1.1-i2v and happyhorse-1.0-i2v Inputs

Both model versions share the same set of parameters.

| Parameter    | Description                                                                                     | Data Type | Required | Range                   |
| ------------ | ----------------------------------------------------------------------------------------------- | --------- | -------- | ----------------------- |
| `prompt`     | Prompt describing the elements and visual features. Supports English and Chinese. (default: "") | STRING    | No       | N/A                     |
| `resolution` | The output video resolution. (default: `"720P"`)                                                | COMBO     | Yes      | `"720P"`<br />`"1080P"` |
| `duration`   | The duration of the generated video in seconds. (default: 5)                                    | INT       | Yes      | 3 to 15                 |

Note: The `first_frame` image must be at least 300x300 pixels, and its aspect ratio must be between 1:2.5 and 2.5:1.

## 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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