GET

/v1/schemas/fal/video/fal-ai/ltx-2/text-to-video/fast

Accept:

kind inputactivity videohash 55de4c79…extracted Jul 6, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `ca3cc776d65588906c2bc5ea548921bb54518804d52fff1155a391adc3ce9517` { "fetchedAt": 1783329487, "extractorVersion": "1", "verifiedAt": null }

Request body

5 properties · 1 required · 0 $defs

property	type	description	constraints
prompt*	string	The prompt to generate the video from	length ≥ 1 · length ≤ 5000
generate_audio	boolean	Whether to generate audio for the generated video	default: true
fps	enum	The frames per second of the generated video	25 \| 50 · default: 25
resolution	enum	The resolution of the generated video	1080p \| 1440p \| 2160p · default: "1080p"
duration	enum	The duration of the generated video in seconds. The fast model supports 6-20 seconds. Note: Durations longer than 10 seconds (12, 14, 16, 18, 20) are only supported with 25 FPS and 1080p resolution.	6 \| 8 \| 10 \| 12 \| 14 \| 16 · +2 more · default: 6

Validate a payload

before you spend tokens

shell

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