> ## 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.

# KlingOmniProFirstLastFrameNode - ComfyUI Built-in Node Documentation

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

This node uses the Kling AI model to generate a video. It requires a starting image and a text prompt. You can optionally provide an ending image or up to six reference images to guide the video's content and style. The node processes these inputs to create a video of a specified duration and resolution.

## Inputs

| Parameter          | Data Type | Required | Range                   | Description                                                                                           |
| ------------------ | --------- | -------- | ----------------------- | ----------------------------------------------------------------------------------------------------- |
| `model_name`       | COMBO     | Yes      | `"kling-video-o1"`      | The specific Kling AI model to use for video generation.                                              |
| `prompt`           | STRING    | Yes      | -                       | A text prompt describing the video content. This can include both positive and negative descriptions. |
| `duration`         | INT       | Yes      | 3 to 10                 | The desired length of the generated video in seconds (default: 5).                                    |
| `first_frame`      | IMAGE     | Yes      | -                       | The starting image for the video sequence.                                                            |
| `end_frame`        | IMAGE     | No       | -                       | An optional end frame for the video. This cannot be used simultaneously with `reference_images`.      |
| `reference_images` | IMAGE     | No       | -                       | Up to 6 additional reference images.                                                                  |
| `resolution`       | COMBO     | No       | `"1080p"`<br />`"720p"` | The output resolution for the generated video (default: "1080p").                                     |

**Important Constraints:**

* The `end_frame` input cannot be used at the same time as the `reference_images` input.
* If you do not provide an `end_frame` or any `reference_images`, the `duration` can only be set to 5 or 10 seconds.
* All input images (`first_frame`, `end_frame`, and any `reference_images`) must have a minimum dimension of 300 pixels in both width and height.
* The aspect ratio of all input images must be between 1:2.5 and 2.5:1.
* A maximum of 6 images can be provided via the `reference_images` input.
* The `prompt` text must be between 1 and 2500 characters in length.

## Outputs

| Output Name | Data Type | Description               |
| ----------- | --------- | ------------------------- |
| `output`    | VIDEO     | The generated video file. |