Video Extension
POST
/kling/v1/videos/video-extend
Submit an extension task for an existing video.
Authorizations
bearer
Type
HTTP (bearer)
Request Body
application/json
Video ID. Supports IDs from videos generated via text, image, or prior extension (original video must be under 3 minutes)
Positive text prompt, up to 2500 characters
Negative text prompt
Prompt adherence strength, range [0, 1]; higher values mean stronger adherence
Callback URL when the task completes
Responses
OK
application/json
Task ID
Task status