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POST
/
kling
/
v1
/
videos
/
omni-video
curl --request POST \
  --url https://api.cometapi.com/kling/v1/videos/omni-video \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "prompt": "The boy in <<<image_1>>> is wearing <<<element_1>>> and, together with the girl in <<<image_2>>>, sits side by side in <<<element_2>>>, playfully and intimately chatting, close-up shot."
}
'
{}
Use this beta endpoint for Kling Omni workflows, including plain text-to-video, image-referenced generation, and video transformation flows.

​
Choose the input mode

  • Text-to-video: send prompt, mode, aspect_ratio, and duration
  • Image-referenced generation: add image_list
  • Element-guided generation: add element_list
  • Video transformation: add video_list with refer_type: base

​
Duration and aspect ratio

SettingSupported valuesDefaultBoundary behavior
duration for text or first-frame video5, 105Use one of the two fixed generation lengths.
duration with reference video inputinput video length from 3 to 10 secondsinput lengthThe generated duration follows the base video and ignores the request value.
aspect_ratio16:9, 9:16, 1:116:9Required when no first-frame image or base video controls the frame.
modestd, propropro is the default for Omni Video.
Kling Omni does not expose an exact size field. Treat aspect_ratio as a frame-shape request; a 16:9 text-to-video request can render as full-HD 1920x1080.

​
Task flow

1

Create the Omni task

Submit the request and store the returned task_id.
2

Poll the Omni task

Continue with Omni Query until the task finishes.
3

Persist the finished video

Move the returned MP4 URL into your own storage if you need durable access.

Authorizations

​
Authorization
string
header
required

Bearer token authentication. Use your CometAPI key.

Headers

​
Content-Type
string

Content type of the request body.

Body

application/json
​
prompt
string
default:Hello
required

Text prompt describing the desired video. Max 2500 characters. Reference images or elements inline using <<<image_1>>>, <<<element_1>>>, <<<video_1>>> syntax.

​
model_name
string

Model to use for Omni Video. Use kling-video-o1 for this endpoint.

​
image_list
object[]

Reference images for the generation. Each entry can optionally include a type field set to first_frame or end_frame to pin the image as the video's start or end frame. Accepts URLs or Base64 strings. Formats: JPG, JPEG, PNG. Max 10 MB per image, minimum 300 px per side, aspect ratio 1:2.5-2.5:1. When used with reference videos, image + element count must not exceed 4; without reference videos, the limit is 7.

​
element_list
object[]

Pre-registered element references by ID. Combined with images, the total count must not exceed 4 (with reference video) or 7 (without).

​
mode
string

Generation mode. std (standard, faster and more cost-effective) or pro (professional, higher quality output). The default is pro.

​
aspect_ratio
string

Aspect ratio request for beta Kling Omni generation. The endpoint does not expose an exact size field; a 16:9 text-to-video request can render as 1920x1080.

​
duration
string

Video length in seconds. Values: 3-10. Text-to-video and first-frame-to-video only support 5 and 10. When editing an existing video, duration matches the input and this parameter is ignored.

​
video_list
string[]

Reference video for style transfer or the base video to edit. Use refer_type to distinguish: feature for style reference, base for the video to modify. Set keep_original_sound to yes or no to control audio retention. Only MP4/MOV, 3-10 seconds, 720-2160 px, 24-60 fps, max 200 MB. Only one video is accepted.

​
callback_url
string

Webhook URL for task status notifications. The server sends a callback when the task status changes.

​
external_task_id
string

Optional user-defined task ID for your own tracking. Does not replace the system-generated task ID. Must be unique per account.

Response

200 - application/json

Success

The response is of type object.