GET

/v1/schemas/fal/video/xai/grok-imagine-video/extend-video

kind inputactivity videohash 20a9b52a…extracted Oct 9, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.

upstream-spec

Source trace
1bfca0aa4f8757676ac439a7b57b7e7c50f6e541a494fe4df27c07e76862710f
{
  "fetchedAt": 1791522002,
  "extractorVersion": "1",
  "verifiedAt": null
}

Request body

4 properties · 2 required · 0 $defs
propertytypedescriptionconstraints
video_url*stringURL of the source video to extend. Must be MP4 format (H.264, H.265, or AV1 codec), 2-15 seconds long.
prompt*stringText description of what should happen next in the video.length ≤ 4096
durationintegerLength of the extension in seconds.2 ≤ n ≤ 10 · default: 6
enable_safety_checkerbooleanAuthorized callers may set false to request relaxed screening.default: true

Validate a payload

before you spend tokens
shell
$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"xai/grok-imagine-video/extend-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}