RunwayImageToVideoNodeGen4 - ComfyUI Built-in Node Documentation

Complete documentation for the RunwayImageToVideoNodeGen4 node in ComfyUI. Learn its inputs, outputs, parameters and usage.

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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	Data Type	Required	Range	Description
prompt	STRING	Yes	-	Text prompt for the generation (default: empty string)
start_frame	IMAGE	Yes	-	Start frame to be used for the video
duration	COMBO	Yes	Multiple options available	Video duration selection from available duration options
ratio	COMBO	Yes	Multiple options available	Aspect ratio selection from available Gen4 Turbo aspect ratio options
seed	INT	No	0 to 4294967295	Random seed for generation (default: 0)

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