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POST
/
kling
/
v1
/
videos
/
multi-elements
/
init-selection
cURL
curl https://api.cometapi.com/kling/v1/videos/multi-elements/init-selection \
  -H "Authorization: Bearer $COMETAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
      "video_id": "<video_id>"
    }'
{
  "code": 123,
  "message": "<string>",
  "data": {
    "session_id": "<string>"
  }
}
Use this endpoint to open a video-editing session and obtain the session_id required by all later multimodal editing steps.

​
Choose one input path

  • Kling-generated video: send video_id
  • External or already-hosted video: send video_url
  • Do not send both input paths at the same time
  • Do not send the parent task_id here; save the returned session_id for the next steps

​
Workflow role

1

Initialize the session

Submit the source clip and save the returned session_id.
2

Mark selection points

Continue with Add Video Selection to define the region you want to edit.
3

Submit the final edit task

After selection is ready, continue with Create Task.
For the complete parameter reference, see the Kling API documentation.

Authorizations

​
Authorization
string
header
required

Bearer token authentication. Use your CometAPI key.

Body

application/json
​
video_id
string
required

Kling video id from a completed task. Send exactly one of video_id or video_url.

​
video_url
string

Public MP4 or MOV URL. Send exactly one of video_id or video_url.

Response

200 - application/json

Session initialized.

​
code
integer
required
​
message
string
required
​
data
object
required