GET

/v1/schemas/fal/video/kling/v4/image-to-video

Accept:

kind inputactivity videohash 9befeddb…extracted Nov 5, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `5b6480a1c3b3faf026d34426b21cafcc7a500a73eba1831a7bb1350a7c80641d` { "fetchedAt": 1793854802, "extractorVersion": "1", "verifiedAt": null }

Request body

7 properties · 1 required · 1 $defs

property	type	description	constraints
start_image_url*	string	Image to use as the first frame of the video.
prompt	string	Optional text prompt. Leave empty (and omit multi_prompt) to animate the frames without one.	length ≤ 26000 · nullable
end_image_url	string	Image to use as the last frame of the video.	nullable
multi_prompt	KlingV4Shot[]	Per-shot prompts for multi-shot generation. The video duration is the sum of the shot durations.	items ≥ 1 · nullable
duration	integer	Video duration in seconds (3-30).	3 ≤ n ≤ 30 · default: 5
middle_image_urls	string[]	Ordered keyframes between the first and last frames (max 8).	items ≤ 8 · nullable
resolution	enum	Output resolution.	720p \| 1080p · default: "1080p"

Types

1 $defs

KlingV4Shotobject

prompt*	string	The prompt for this shot.	length ≥ 1 · length ≤ 512
duration	integer	Shot duration in seconds.	1 ≤ n ≤ 30 · default: 5

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"kling/v4/image-to-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}