The Runway Image to Video (Gen3a Turbo) node generates a video from a single starting frame using Runway's Gen3a Turbo model. It takes a text prompt and an initial image frame, then creates a video sequence based on the specified duration and aspect ratio. This node connects to Runway's API to process the generation remotely.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| --- | --- | --- | --- | --- |
| `prompt` | Text prompt for the generation (default: "") | STRING | Yes | N/A |
| `start_frame` | Start frame to be used for the video | IMAGE | Yes | N/A |
| `duration` | Video duration in seconds (default: "5") | COMBO | Yes | `"5"`<br>`"10"` |
| `ratio` | Aspect ratio of the generated video (default: "768:1280") | COMBO | Yes | `"768:1280"`<br>`"1280:768"` |
| `seed` | Random seed for generation (default: 0) | INT | No | 0 to 4294967295 |

**Parameter Constraints:**

- The `start_frame` must have dimensions not exceeding 7999x7999 pixels.
- The `start_frame` must have an aspect ratio between 0.5 and 2.0.
- The `prompt` must contain at least one character (cannot be empty).

## Outputs

| Output Name | Description | Data Type |
| --- | --- | --- |
| `output` | The generated video sequence | 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/RunwayImageToVideoNodeGen3a/en.md)

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