LtxvApiImageToVideo - ComfyUI Built-in Node Documentation

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

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The LTXV Image To Video node generates a professional-quality video from a single starting image. It uses an external API to create a video sequence based on your text prompt, allowing you to customize the duration, resolution, and frame rate.

Inputs

Parameter	Data Type	Required	Range	Description
image	IMAGE	Yes	-	First frame to be used for the video.
model	COMBO	Yes	"LTX-2 (Fast)" "LTX-2 (Quality)"	The AI model to use for video generation. The “Fast” model is optimized for speed, while the “Quality” model prioritizes visual fidelity.
prompt	STRING	Yes	-	A text description that guides the content and motion of the generated video.
duration	COMBO	Yes	6 8 10 12 14 16 18 20	The length of the video in seconds (default: 8).
resolution	COMBO	Yes	"1920x1080" "2560x1440" "3840x2160"	The output resolution of the generated video.
fps	COMBO	Yes	25 50	The frames per second for the video (default: 25).
generate_audio	BOOLEAN	No	-	When true, the generated video will include AI-generated audio matching the scene (default: False).

Important Constraints:

• The image input must contain exactly one image.
• The prompt must be between 1 and 10,000 characters long.
• If you select a duration longer than 10 seconds, you must use the “LTX-2 (Fast)” model, a “1920x1080” resolution, and 25 FPS. This combination is required for longer videos.

Outputs

Output Name	Data Type	Description
video	VIDEO	The generated video file.