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POST
/
v3
/
async
/
kling-v3.0-4k-i2v
Kling v3.0 4K Image-to-Video
curl --request POST \
  --url https://api.novita.ai/v3/async/kling-v3.0-4k-i2v \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "image": "<string>",
  "sound": true,
  "prompt": "<string>",
  "duration": 123,
  "cfg_scale": 123,
  "end_image": "<string>",
  "multi_prompt": [
    {
      "prompt": "<string>",
      "duration": 123
    }
  ],
  "negative_prompt": "<string>"
}
'
{
  "task_id": "<string>"
}

Documentation Index

Fetch the complete documentation index at: https://novita.ai/docs/llms.txt

Use this file to discover all available pages before exploring further.

Kling v3.0 4K Image-to-Video generates native 4K ultra-high-definition videos from a first-frame image with cinematic quality, smooth motion, precise prompt adherence, and optional synchronized audio generation. Supports end-frame guidance, multi-shot composition, and flexible 3-15 second durations.
This is an asynchronous API; only the task_id will be returned. You should use the task_id to request the Task Result API to retrieve the video generation results.

​
Request Headers

​
Content-Type
string
required
Supports: application/json
​
Authorization
string
required
Bearer authentication format, for example: Bearer {{API Key}}.

​
Request Body

​
image
string
required
First frame image for video; supports .jpg, .jpeg, .png. Image file size must not exceed 10MB; width and height must be >= 300px; aspect ratio must be between 1:2.5 and 2.5:1.
​
sound
boolean
default:false
Whether to generate synchronized audio simultaneously with the video. Supports Chinese and English voice output.
​
prompt
string
required
Positive prompt text for video generation, describing scene motion, camera movement, actions, voice style, atmosphere, and sound effects; must not exceed 2500 characters.Length limit: 0 - 2500
​
duration
integer
default:5
Duration of generated video in seconds. Supports flexible durations from 3 to 15 seconds.Value range: [3, 15]
​
cfg_scale
number
Controls flexibility of video generation. Higher values result in content more closely following the prompt; lower values produce more natural motion.Value range: [0, 1]
​
end_image
string
Ending frame image URL for guided transitions between start and end frames. Same format constraints as image. Cannot be used together with multi_prompt.
​
multi_prompt
array
Array of prompts for multi-shot video composition. Each item contains a prompt and duration for one segment. Cannot be used together with end_image.
​
negative_prompt
string
Negative prompt describing elements to avoid in video and audio; must not exceed 2500 characters.Length limit: 0 - 2500

​
Response

​
task_id
string
required
Use the task_id to request the Task Result API to retrieve the generated outputs.