RunwayImageToVideoNodeGen3a - ComfyUI Built-in Node Documentation

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. Runway recommends reviewing their best practices guide before generating: https://help.runwayml.com/hc/en-us/articles/33927968552339-Creating-with-Act-One-on-Gen-3-Alpha-and-Turbo. This node is marked as deprecated.

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"` `"10"`
`ratio`	Aspect ratio of the generated video (default: “768:1280”)	COMBO	Yes	`"768:1280"` `"1280:768"`
`seed`	Random seed for generation (default: 0)	INT	Yes	0 to 4294967295

Parameter Constraints:

The start_frame must not exceed 7999x7999 pixels in dimensions.
The start_frame must have an aspect ratio between 0.5 and 2.0.
The start_frame accepts a single image (maximum of 1).
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

Source fingerprint (SHA-256): ff66cbdfa80aabeaf96d43e7822dd0c700ee027d13fb430a9dc2079e1a23f38e

​Inputs

​Outputs

Inputs

Outputs