> ## 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.

# WanImageToVideoApi - ComfyUI Built-in Node Documentation

> Complete documentation for the WanImageToVideoApi 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/WanImageToVideoApi/en.md)

The Wan Image to Video node generates video content starting from a single input image and a text prompt. It creates video sequences by extending the initial frame according to the provided description, with options to control video quality, duration, and audio integration.

## Inputs

| Parameter         | Data Type | Required | Range                                          | Description                                                                                         |
| ----------------- | --------- | -------- | ---------------------------------------------- | --------------------------------------------------------------------------------------------------- |
| `model`           | COMBO     | Yes      | "wan2.5-i2v-preview"<br />"wan2.5-i2v-preview" | Model to use (default: "wan2.5-i2v-preview")                                                        |
| `image`           | IMAGE     | Yes      | -                                              | Input image that serves as the first frame for video generation                                     |
| `prompt`          | STRING    | Yes      | -                                              | Prompt used to describe the elements and visual features, supports English/Chinese (default: empty) |
| `negative_prompt` | STRING    | No       | -                                              | Negative text prompt to guide what to avoid (default: empty)                                        |
| `resolution`      | COMBO     | No       | "480P"<br />"720P"<br />"1080P"                | Video resolution quality (default: "480P")                                                          |
| `duration`        | INT       | No       | 5-10                                           | Available durations: 5 and 10 seconds (default: 5)                                                  |
| `audio`           | AUDIO     | No       | -                                              | Audio must contain a clear, loud voice, without extraneous noise, background music                  |
| `seed`            | INT       | No       | 0-2147483647                                   | Seed to use for generation (default: 0)                                                             |
| `generate_audio`  | BOOLEAN   | No       | -                                              | If there is no audio input, generate audio automatically (default: False)                           |
| `prompt_extend`   | BOOLEAN   | No       | -                                              | Whether to enhance the prompt with AI assistance (default: True)                                    |
| `watermark`       | BOOLEAN   | No       | -                                              | Whether to add an "AI generated" watermark to the result (default: True)                            |

**Constraints:**

* Exactly one input image is required for video generation
* Duration parameter only accepts values of 5 or 10 seconds
* When audio is provided, it must be between 3.0 and 29.0 seconds in duration

## Outputs

| Output Name | Data Type | Description                                         |
| ----------- | --------- | --------------------------------------------------- |
| `output`    | VIDEO     | Generated video based on the input image and prompt |