KlingVideoExtendNode - ComfyUI Built-in Node Documentation

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

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The Kling Video Extend Node allows you to extend videos created by other Kling nodes. It takes an existing video identified by its video ID and generates additional content based on your text prompts. The node works by sending your extension request to the Kling API and returning the extended video along with its new ID and duration.

Inputs

Parameter	Data Type	Required	Range	Description
prompt	STRING	No	-	Positive text prompt for guiding the video extension
negative_prompt	STRING	No	-	Negative text prompt for elements to avoid in the extended video
cfg_scale	FLOAT	No	0.0 - 1.0	Controls the strength of prompt guidance (default: 0.5)
video_id	STRING	Yes	-	The ID of the video to be extended. Supports videos generated by text-to-video, image-to-video, and previous video extension operations. Cannot exceed 3 minutes total duration after extension.

Note: The video_id must reference a video created by other Kling nodes, and the total duration after extension cannot exceed 3 minutes.

Outputs

Output Name	Data Type	Description
output	VIDEO	The extended video generated by the Kling API
video_id	STRING	The unique identifier for the extended video
duration	STRING	The duration of the extended video