Kling 4.0 Image to Video - ComfyUI Built-in Node Documentation

Generates a video from a set of keyframes with the Kling 4.0 model, including audio. The first frame, up to eight middle frames, and the last frame are sent in order, the middle frames are spaced evenly across the clip, and the output takes the aspect ratio of the first keyframe. Use it to animate one image or to steer a shot through a sequence of key moments.

Inputs

Common Inputs

Parameter	Description	Data Type	Required	Range
`model`	Model selector. Only `"kling-4.0"` is available; selecting it reveals the inputs below.	DYNAMIC_COMBO	Yes	`"kling-4.0"`

kling-4.0 Inputs

These inputs appear when model is set to "kling-4.0". At least one of the frame inputs must be connected.

Parameter	Description	Data Type	Required	Range
`first_frame`	Optional frame the video starts on.	IMAGE	No	-
`middle_frames`	Optional growable slots for frames between the first and the last one, up to 8. They are spaced evenly through the clip.	AUTOGROW	No	0 to 8 images
`last_frame`	Optional frame the video ends on.	IMAGE	No	-
`prompt`	Optional description of the motion. Refer to the connected frames as `@Image1`, `@Image2` and so on, in the order first frame, middle frames, last frame. Default: empty string.	STRING	Yes	Multiline text
`resolution`	Resolution of the output video. Default: `"720p"`.	COMBO	Yes	`"720p"` `"1080p"`
`duration`	Length of the generated video in seconds. Default: 5.	INT	Yes	3 to 30
`seed`	Seed controls whether the node should re-run; results are non-deterministic regardless of seed. Default: 42.	INT	Yes	0 to 2147483647

Constraints and behavior:

At most 10 frames can be connected in total, counting the first frame, every middle frame and the last frame.
The video takes the aspect ratio of the first keyframe, so no aspect ratio input is needed.
Every frame must be at least 300x300 pixels with an aspect ratio between 2:5 and 5:2.
A prompt that mentions @ImageN raises an error when fewer than N frames are connected.

Outputs

Output Name	Description	Data Type
`video`	The generated video, downloaded from the provider once the task completes.	VIDEO

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​Inputs

​Common Inputs

​kling-4.0 Inputs

​Outputs

Inputs

Common Inputs

kling-4.0 Inputs

Outputs