RunwayImageToVideoNodeGen4 - ComfyUI Built-in Node Documentation

The Runway Image to Video (Gen4 Turbo) node generates a video from a single starting frame using Runway’s Gen4 Turbo model. It takes a text prompt and an initial image frame, then creates a video sequence based on the provided duration and aspect ratio settings. The node handles uploading the starting frame to Runway’s API and returns the generated video.

Inputs

Parameter	Description	Data Type	Required	Range
`prompt`	Text prompt for the generation (default: empty string)	STRING	Yes	-
`start_frame`	Start frame to be used for the video	IMAGE	Yes	-
`duration`	Video duration in seconds (default: “5”)	COMBO	Yes	`"5"` `"10"`
`ratio`	Aspect ratio for the generated video (default: “1280:720”)	COMBO	Yes	`"1280:720"` `"720:1280"` `"1104:832"` `"832:1104"` `"960:960"` `"1584:672"`
`seed`	Random seed for generation (default: 0)	INT	No	0 to 4294967295

Parameter Constraints:

The start_frame image must have dimensions not exceeding 7999x7999 pixels
The start_frame image must have an aspect ratio between 0.5 and 2.0
The prompt must contain at least one character

Outputs

Output Name	Description	Data Type
`output`	The generated video based on the input frame and prompt	VIDEO

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​Inputs

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Inputs

Outputs