RunwayImageToVideoNodeGen3a - ComfyUI Built-in Node Documentation - ComfyUI

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. The generation is processed remotely through Runway’s API. 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`	Duration of the generated video, 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 prompt must contain at least one character (it cannot be empty).
The start_frame accepts a single image (maximum of 1).
The start_frame must not exceed 7999 x 7999 pixels in dimensions.
The start_frame must have an aspect ratio between 1:2 and 2:1 (0.5 to 2.0).

Outputs

Output Name	Description	Data Type
`output`	The generated video sequence	VIDEO

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