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POST
/
kling
/
v1
/
audio
/
video-to-audio
Create a Kling video-to-audio task
curl --request POST \
  --url https://api.cometapi.com/kling/v1/audio/video-to-audio \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "video_url": "https://xxxxx.mp4"
}
'
{
  "code": 123,
  "message": "<string>",
  "data": {
    "task_id": "<string>",
    "task_status": "<string>",
    "created_at": 123,
    "updated_at": 123
  }
}
Use this endpoint to generate an audio result from a source video.

​
Before you call it

  • Send either video_id or video_url, but not both
  • Use video_url when the source clip did not come from Kling originally
  • Keep callback_url and external_task_id optional unless your integration needs them

​
Task flow

1

Submit the source video

Send either the Kling video_id or an accessible video_url, then save the returned task id.
2

Poll the task

Continue with Individual Queries using the Kling audio query path until the task reaches a terminal state.
3

Persist the output

Store the final audio asset if you need stable retention or downstream processing.
For the complete parameter reference, see the official Kling documentation.

Authorizations

​
Authorization
string
header
required

Bearer token authentication. Use your CometAPI key.

Body

application/json
​
video_id
string
default:861034216165875784
required

ID of a Kling-generated video. Only videos created within the last 30 days with a duration of 3–20 seconds are supported. Mutually exclusive with video_url — exactly one must be provided.

​
external_task_id
string
default:audio-video-task-001

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

​
callback_url
string
default:https://example.com/webhook

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

​
video_url
string
default:http://runwaycdn.rixapi.com/attachments/video/runway/20241015/82bc23c83b5c32e75059c8328df5cffb.mp4

Accessible URL of the source video. Accepted formats: MP4, MOV. Max 100 MB, 720p or 1080p resolution, duration 3–20 seconds. Mutually exclusive with video_id — exactly one must be provided.

Response

200 - application/json

Task accepted.

​
code
integer
required

Error code; specific error code definition

​
message
string
required

Error message

​
data
object
required