GET

/v1/schemas/fal/video/fal-ai/ltx-2/audio-to-video

Accept:

kind inputactivity videohash 62d1204e…extracted Jul 6, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `813b517345e1df615360a41287acf60fa287efd852e9ba847abf692f8a29797e` { "fetchedAt": 1783331098, "extractorVersion": "1", "verifiedAt": null }

Request body

4 properties · 1 required · 0 $defs

property	type	description	constraints
audio_url*	string	URL of the audio file to generate a video from. Duration must be between 2 and 20 seconds. Must be publicly accessible or base64 data URI.
guidance_scale	number	Guidance scale for video generation. Higher values make the output more closely follow the prompt. Defaults to 5 for text-to-video, or 9 when providing an image.	1 ≤ n ≤ 50 · nullable
image_url	string	URL of an image to use as the first frame of the video. If not provided, prompt is required.	nullable
prompt	string	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.	length ≥ 1 · length ≤ 5000 · nullable

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/ltx-2/audio-to-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}