GET

/v1/schemas/fal/video/fal-ai/ltx-2/extend-video

Accept:

kind inputactivity videohash 43d29163…extracted Jul 6, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `703bcb88349d5d2aa2ea45de6181a4be28c74850510cf683d8630c8bcda52d88` { "fetchedAt": 1783331098, "extractorVersion": "1", "verifiedAt": null }

Request body

5 properties · 1 required · 0 $defs

property	type	description	constraints
video_url*	string	The URL of the video to extend
mode	enum	Where to extend the video: 'end' extends at the end, 'start' extends at the beginning.	start \| end · default: "end"
context	number	Number of seconds from the input video to use as context for the extension (minimum 1 second, maximum 20 seconds). If not provided, defaults to maximize available context within the 505 frame limit.	1 ≤ n ≤ 20 · nullable
duration	number	Duration in seconds to extend the video. Minimum 2 seconds, maximum 20 seconds.	2 ≤ n ≤ 20 · default: 5
prompt	string	Description of what should happen in the extended portion of the video.	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/extend-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}