> ## 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.

# LtxApi25ImageToVideo - ComfyUI Built-in Node Documentation

> This node generates a professional-quality video based on a starting image.

This node generates a professional-quality video based on a starting image. You can choose the LTX 2.5 model variant, describe the video with a text prompt, adjust duration, resolution, frame rate, and audio generation, and optionally provide a final frame. The output is a video that starts from the provided image.

## Inputs

| Parameter              | Description                                                                                                  | Data Type | Required | Range                                                                                                                            |
| ---------------------- | ------------------------------------------------------------------------------------------------------------ | --------- | -------- | -------------------------------------------------------------------------------------------------------------------------------- |
| `image`                | First frame to be used for the video.                                                                        | IMAGE     | Yes      | Exactly one image                                                                                                                |
| `model`                | Model settings group. Selects the LTX 2.5 model variant to use.                                              | COMBO     | Yes      | "LTX-2.5 (Fast)"<br />"LTX-2.5 (Pro)"                                                                                            |
| `model.duration`       | Length of the generated video in seconds.                                                                    | INT       | Yes      | Integer                                                                                                                          |
| `model.resolution`     | Resolution of the generated video. Available options may depend on the selected model.                       | COMBO     | Yes      | "1280x720"<br />"720x1280"<br />"1920x1080"<br />"1080x1920"<br />"2560x1440"<br />"1440x2560"<br />"3840x2160"<br />"2160x3840" |
| `model.fps`            | Frame rate of the generated video.                                                                           | INT       | Yes      | Integer (default: 25)                                                                                                            |
| `model.generate_audio` | Whether to generate audio for the video.                                                                     | BOOLEAN   | Yes      | True<br />False                                                                                                                  |
| `prompt`               | Text description of the video content to generate. Must be between 1 and 10000 characters.                   | STRING    | Yes      | 1 to 10000 characters                                                                                                            |
| `seed`                 | Seed value for reproducible generation. Using the same seed with the same settings produces the same result. | INT       | Yes      | Integer (default: 42)                                                                                                            |
| `last_frame`           | Last frame to be used for the video.                                                                         | IMAGE     | No       | Exactly one image                                                                                                                |

## Outputs

| Output Name | Description                                                                    | Data Type |
| ----------- | ------------------------------------------------------------------------------ | --------- |
| `video`     | The generated video based on the provided start image and generation settings. | 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/LtxApi25ImageToVideo/en.md)

***

**Source fingerprint (SHA-256):** `13db42e5e0d4237424b30b960ec12f5dd16808d21b85e100e5861c095b351c79`