> ## 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.

# LtxApi25TextToVideo - ComfyUI Built-in Node Documentation

> LTX 2.5 Text To Video is an API node that generates professional-quality videos from a text description using the LTX 2.5 model.

LTX 2.5 Text To Video is an API node that generates professional-quality videos from a text description using the LTX 2.5 model. You provide a prompt and choose generation settings such as the model tier, duration, resolution, frame rate, and whether to include audio; the node submits the task to the LTX API and returns the resulting video.

## Inputs

| Parameter              | Description                                                                                                             | Data Type | Required | Range                                                                                                                                                                                                                                                     |
| ---------------------- | ----------------------------------------------------------------------------------------------------------------------- | --------- | -------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `model`                | The LTX 2.5 model tier to use for video generation.                                                                     | STRING    | Yes      | "LTX-2.5 (Fast)"<br />"LTX-2.5 (Pro)"                                                                                                                                                                                                                     |
| `model.duration`       | The length of the generated video.                                                                                      | INT       | Yes      | Integer                                                                                                                                                                                                                                                   |
| `model.resolution`     | The output resolution of the video. Available options depend on the selected `model`.                                   | STRING    | Yes      | With "LTX-2.5 (Fast)":<br />"1280x720"<br />"720x1280"<br />"1920x1080"<br />"1080x1920"<br />"2560x1440"<br />"1440x2560"<br />"3840x2160"<br />"2160x3840"<br />With "LTX-2.5 (Pro)":<br />"1280x720"<br />"720x1280"<br />"1920x1080"<br />"1080x1920" |
| `model.fps`            | Frame rate of the generated video (default: 25).                                                                        | INT       | No       | Integer                                                                                                                                                                                                                                                   |
| `model.generate_audio` | Whether to generate audio together with the video (default: True).                                                      | BOOLEAN   | No       | True<br />False                                                                                                                                                                                                                                           |
| `prompt`               | The text description of the video to generate. A non-empty prompt of up to 10,000 characters is required (default: ""). | STRING    | Yes      | 1 to 10000 characters                                                                                                                                                                                                                                     |
| `seed`                 | Seed value used for reproducible generation (default: 42).                                                              | INT       | No       | Integer                                                                                                                                                                                                                                                   |

Note: The available `model.resolution` options depend on the selected `model`. "LTX-2.5 (Fast)" supports resolutions up to 2160x3840, while "LTX-2.5 (Pro)" supports resolutions up to 1920x1080.

## Outputs

| Output Name | Description                                                                                                                                                 | Data Type |
| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- |
| `video`     | The generated video returned by the LTX API, ready for further use in the workflow. If audio generation was enabled, the video includes synchronized audio. | 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/LtxApi25TextToVideo/en.md)

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