LtxApi25AudioToVideo - ComfyUI Built-in Node Documentation - ComfyUI

This node generates a video that follows an audio track using the LTX 2.5 model. The audio determines the video duration (between 2 and 20 seconds), and you can optionally provide an image to use as the first frame. The video is generated through the LTX 2.5 API service.

Inputs

Parameter	Description	Data Type	Required	Range
`audio`	Audio track driving the video. Its length (2-20 seconds) sets the video duration.	AUDIO	Yes	2-20 seconds
`model`	The LTX 2.5 model version to use. The resolution is chosen along with the model; both models offer the same resolution options (1920x1080 or 1080x1920).	COMBO	Yes	”LTX-2.5 (Fast)" "LTX-2.5 (Pro)“
`prompt`	A text description that guides the content of the generated video (default: ""). Must contain at least 1 character and at most 10000 characters.	STRING	Yes	1-10000 characters
`seed`	A number that controls the randomness of the generation. The same seed produces the same result (default: 42).	INT	Yes	Any integer
`image`	Optional first frame to be used for the video. Only one image is supported.	IMAGE	No	Single image

Notes on constraints:

The audio duration must be between 2 and 20 seconds; the node raises an error if it is outside this range.
The prompt is required and cannot be empty.
Only a single input image is accepted when image is provided.

Outputs

Output Name	Description	Data Type
`video`	The generated video driven by the provided audio track.	VIDEO

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