Ltx 2.5 Audio to Video Fast

Text description of how the video should be generated. Required if image_url is not provided. When image_url is provided, this describes how the image should be animated.

URL of the audio file to generate a video from. Duration must be between 2 and 20 seconds; pro models support a maximum of 10 seconds. Must be publicly accessible or base64 data URI.

URL of an image to use as the first frame of the video. If not provided, prompt is required.

The aspect ratio of the generated video. If 'auto', the aspect ratio will be determined automatically based on the input image, or defaults to 16:9 if no image is provided.