> ## 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 from a starting image using an LTX 2.5 model.

This node generates a professional-quality video from a starting image using an LTX 2.5 model. You describe the video content with a text prompt, select a model variant, and adjust duration, resolution, frame rate, and audio generation. An optional final frame can be supplied to define the end of the video.

## 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 (default: True) |
| `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 |

**Note:** Only one image is supported for `image`. If `last_frame` is provided, it must also contain exactly one image. The available `model.resolution` options may vary depending on the selected `model` variant. The price of a run depends on the selected `model`, `model.duration`, and `model.resolution`.

## 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)

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