> ## 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.

# ByteDanceFirstLastFrameNode - ComfyUI Built-in Node Documentation

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

This node generates a video using a text prompt along with first and last frame images. It takes your description and the two key frames to create a complete video sequence that transitions between them. The node provides various options to control the video's resolution, aspect ratio, duration, and other generation parameters.

## Inputs

| Parameter      | Data Type | Input Type | Default           | Range                                     | Description                                                                                                                                                     |
| -------------- | --------- | ---------- | ----------------- | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `model`        | COMBO     | combo      | seedance\_1\_lite | seedance\_1\_lite                         | Model name                                                                                                                                                      |
| `prompt`       | STRING    | string     | -                 | -                                         | The text prompt used to generate the video.                                                                                                                     |
| `first_frame`  | IMAGE     | image      | -                 | -                                         | First frame to be used for the video.                                                                                                                           |
| `last_frame`   | IMAGE     | image      | -                 | -                                         | Last frame to be used for the video.                                                                                                                            |
| `resolution`   | COMBO     | combo      | -                 | 480p, 720p, 1080p                         | The resolution of the output video.                                                                                                                             |
| `aspect_ratio` | COMBO     | combo      | -                 | adaptive, 16:9, 4:3, 1:1, 3:4, 9:16, 21:9 | The aspect ratio of the output video.                                                                                                                           |
| `duration`     | INT       | slider     | 5                 | 3-12                                      | The duration of the output video in seconds.                                                                                                                    |
| `seed`         | INT       | number     | 0                 | 0-2147483647                              | Seed to use for generation. (optional)                                                                                                                          |
| `camera_fixed` | BOOLEAN   | boolean    | False             | -                                         | Specifies whether to fix the camera. The platform appends an instruction to fix the camera to your prompt, but does not guarantee the actual effect. (optional) |
| `watermark`    | BOOLEAN   | boolean    | True              | -                                         | Whether to add an "AI generated" watermark to the video. (optional)                                                                                             |

## Outputs

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