# Kling Start-End Frame to Video

This node creates a video sequence that transitions between your provided start and end images. It generates all the frames in between to produce a smooth transformation from the first frame to the last frame. This node calls the image-to-video API but only supports the input options that work with the `image_tail` request field.

## Inputs

| Parameter | Description | Data Type | Required | Range |
|-----------|-------------|-----------|----------|-------|
| `start_frame` | Reference Image - URL or Base64 encoded string, cannot exceed 10MB, resolution not less than 300*300px, aspect ratio between 1:2.5 ~ 2.5:1. Base64 should not include data:image prefix. | IMAGE | Yes | - |
| `end_frame` | Reference Image - End frame control. URL or Base64 encoded string, cannot exceed 10MB, resolution not less than 300*300px. Base64 should not include data:image prefix. | IMAGE | Yes | - |
| `prompt` | Positive text prompt | STRING | Yes | - |
| `negative_prompt` | Negative text prompt | STRING | Yes | - |
| `cfg_scale` | Controls the strength of the prompt guidance (default: 0.5) | FLOAT | No | 0.0-1.0 |
| `aspect_ratio` | The aspect ratio for the generated video (default: "16:9") | COMBO | No | "16:9"<br>"9:16"<br>"1:1" |
| `mode` | The configuration to use for the video generation following the format: mode / duration / model_name. (default: "pro mode / 5s duration / kling-v2-5-turbo") | COMBO | No | "pro mode / 5s duration / kling-v1-5"<br>"pro mode / 10s duration / kling-v1-5"<br>"pro mode / 5s duration / kling-v1-6"<br>"pro mode / 10s duration / kling-v1-6"<br>"pro mode / 5s duration / kling-v2-1"<br>"pro mode / 10s duration / kling-v2-1"<br>"pro mode / 5s duration / kling-v2-5-turbo"<br>"pro mode / 10s duration / kling-v2-5-turbo" |

**Image Constraints:**

- Both `start_frame` and `end_frame` must be provided and cannot exceed 10MB file size
- Minimum resolution: 300×300 pixels for both images
- `start_frame` aspect ratio must be between 1:2.5 and 2.5:1
- Base64 encoded images should not include the "data:image" prefix

## Outputs

| Output Name | Description | Data Type |
|-------------|-------------|-----------|
| `output` | The generated video sequence | VIDEO |
| `video_id` | Unique identifier for the generated video | STRING |
| `duration` | Duration of the generated video | STRING |

> 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/KlingStartEndFrameNode/en.md)

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