> ## 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

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.

<Tip>
  This is an **asynchronous** API; only the **task\_id** will be returned. You should use the **task\_id** to request the [**Task Result API**](/api-reference/model-apis-task-result) to retrieve the video generation results.
</Tip>

## Request Headers

<ParamField header="Content-Type" type="string" required={true}>
  Supports: `application/json`
</ParamField>

<ParamField header="Authorization" type="string" required={true}>
  Bearer authentication format, for example: Bearer \{\{API Key}}.
</ParamField>

## Request Body

<ParamField body="image" type="string" required={true}>
  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.
</ParamField>

<ParamField body="sound" type="boolean" default={false}>
  Whether to generate synchronized audio simultaneously with the video. Supports Chinese and English voice output.
</ParamField>

<ParamField body="prompt" type="string" required={true}>
  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
</ParamField>

<ParamField body="duration" type="integer" default={5}>
  Duration of generated video in seconds. Supports flexible durations from 3 to 15 seconds.

  Value range: \[3, 15]
</ParamField>

<ParamField body="cfg_scale" type="number" default={0.5}>
  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]
</ParamField>

<ParamField body="end_image" type="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.
</ParamField>

<ParamField body="multi_prompt" type="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.

  <Expandable title="properties" defaultOpen={true}>
    <ParamField body="prompt" type="string" required={true}>
      Motion description for this video segment.
    </ParamField>

    <ParamField body="duration" type="integer" default={5}>
      Duration of this segment in seconds, range 3-15.

      Value range: \[3, 15]
    </ParamField>
  </Expandable>
</ParamField>

<ParamField body="negative_prompt" type="string">
  Negative prompt describing elements to avoid in video and audio; must not exceed 2500 characters.

  Length limit: 0 - 2500
</ParamField>

## Response

<ResponseField name="task_id" type="string" required={true}>
  Use the task\_id to request the [Task Result API](/api-reference/model-apis-task-result) to retrieve the generated outputs.
</ResponseField>