Only videos from supported generation types can be extended.
Parent Kling task id for the extension-compatible video being extended.
Video id from a parent task result. The source video must be extension-compatible; unsupported videos return HTTP 400.
Text prompt describing the desired motion for the extended segment. Maximum 500 characters.
Webhook URL to receive task status updates when the task completes.
Elements to avoid in the extension.
Prompt adherence strength for the extension. Range: 0-1.
Successful Response
Error code; specifically define the error code
error message
Request ID, system-generated, for tracking requests, troubleshooting issues