> ## 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.

# Veo3FirstLastFrameNode - ComfyUI Built-in Node Documentation

> Complete documentation for the Veo3FirstLastFrameNode node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The Veo3FirstLastFrameNode uses Google's Veo 3 model to generate a video based on a text prompt, with a provided first and last frame that define the start and end of the video sequence.

## Inputs

| Parameter         | Description                                                                       | Data Type | Required | Range                                                                     |
| ----------------- | --------------------------------------------------------------------------------- | --------- | -------- | ------------------------------------------------------------------------- |
| `prompt`          | Text description of the video (default: empty string).                            | STRING    | Yes      | N/A                                                                       |
| `negative_prompt` | Negative text prompt to guide what to avoid in the video (default: empty string). | STRING    | No       | N/A                                                                       |
| `resolution`      | The resolution of the output video.                                               | COMBO     | Yes      | `"720p"`<br />`"1080p"`<br />`"4k"`                                       |
| `aspect_ratio`    | Aspect ratio of the output video (default: "16:9").                               | COMBO     | No       | `"16:9"`<br />`"9:16"`                                                    |
| `duration`        | Duration of the output video in seconds (default: 8, step: 2).                    | INT       | No       | 4 to 8                                                                    |
| `seed`            | Seed for video generation (default: 0).                                           | INT       | No       | 0 to 4294967295                                                           |
| `first_frame`     | The start frame for the video.                                                    | IMAGE     | Yes      | N/A                                                                       |
| `last_frame`      | The end frame for the video.                                                      | IMAGE     | Yes      | N/A                                                                       |
| `model`           | The specific Veo 3 model to use for generation (default: "veo-3.1-generate").     | COMBO     | No       | `"veo-3.1-generate"`<br />`"veo-3.1-fast-generate"`<br />`"veo-3.1-lite"` |
| `generate_audio`  | Generate audio for the video (default: True).                                     | BOOLEAN   | No       | N/A                                                                       |

**Note:** The `veo-3.1-lite` model does not support 4K resolution. If you select `veo-3.1-lite` and `4k` resolution, an error will occur.

## Outputs

| Output Name | Description               | Data Type |
| ----------- | ------------------------- | --------- |
| `output`    | The generated video file. | 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/Veo3FirstLastFrameNode/en.md)

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