> ## Documentation Index
> Fetch the complete documentation index at: https://docs.toapis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Grok Imagine Video Extend (公式チャネル)

> Extend generated Grok Imagine videos via the official channel

<Note>
  **中国本土のユーザー向け：** 中国本土のユーザーは `https://toapis.cn` を API エンドポイント（Base URL）としてご利用ください。本ドキュメント内の例では `https://toapis.com` を `https://toapis.cn` に置き換えてください。
</Note>

* Official-channel Grok Imagine video extend feature
* Extend the duration of existing videos by 2-10 seconds
* Async task management, query results via task ID

## Path Parameters

<ParamField path="video_id" type="string" required>
  Original video task ID

  This is the task ID returned from a previous video generation request. The finished video of that task is used as the extension source.

  To extend an arbitrary video URL without a source task, use `POST /v1/videos/extend` and pass `video_urls` in the body instead of a path parameter.
</ParamField>

## Authorizations

<ParamField header="Authorization" type="string" required>
  All API requests require Bearer Token authentication

  Get API Key: Visit the [API Key Management Page](https://toapis.com/console/token) to obtain your API Key

  Add to request headers:

  ```
  Authorization: Bearer YOUR_API_KEY
  ```
</ParamField>

## Body

<ParamField body="model" type="string" default="grok-imagine-video-official" required>
  Video extend model name

  Example: `"grok-imagine-video-official"`
</ParamField>

<ParamField body="prompt" type="string" required>
  Text description for video extension
</ParamField>

<ParamField body="duration" type="integer" default="6">
  Extension length in seconds

  Supported range: `2`–`10` seconds
</ParamField>

<ParamField body="video_urls" type="string[]">
  Source video URL list. Required when using `POST /v1/videos/extend` without a task ID; optional when `video_id` is present in the path.

  Public `http://`/`https://` URLs or platform `asset://` references.
</ParamField>

<Note>
  **Pricing note**: Extension bills the generated extension seconds plus the **input source video duration** per second. The input video duration is determined automatically by the platform; it does not need to be declared in the request.
</Note>

## Response

<ResponseField name="id" type="string">
  Unique task identifier for querying task status
</ResponseField>

<ResponseField name="object" type="string">
  Object type, always `generation.task`
</ResponseField>

<ResponseField name="model" type="string">
  Model name used
</ResponseField>

<ResponseField name="status" type="string">
  Task status

  * `queued` - Waiting to be processed
  * `in_progress` - Processing
  * `completed` - Successfully completed
  * `failed` - Failed
</ResponseField>

<ResponseField name="progress" type="integer">
  Task progress percentage (0-100)
</ResponseField>

<ResponseField name="created_at" type="integer">
  Task creation timestamp (Unix timestamp)
</ResponseField>

<ResponseField name="metadata" type="object">
  Task metadata
</ResponseField>

<RequestExample>
  ```bash cURL (Extend from task) theme={null}
  curl --request POST \
    --url https://toapis.com/v1/videos/tsk_vid_01M59KNFZA2N4QFP0TMGACYH98/extend \
    --header 'Authorization: Bearer <token>' \
    --header 'Content-Type: application/json' \
    --data '{
      "model": "grok-imagine-video-official",
      "prompt": "Continue the scene, make the dog run towards the horizon",
      "duration": 6
    }'
  ```

  ```bash cURL (Extend from URL) theme={null}
  curl --request POST \
    --url https://toapis.com/v1/videos/extend \
    --header 'Authorization: Bearer <token>' \
    --header 'Content-Type: application/json' \
    --data '{
      "model": "grok-imagine-video-official",
      "prompt": "Continue the scene, make the dog run towards the horizon",
      "duration": 6,
      "video_urls": ["https://example.com/source-video.mp4"]
    }'
  ```

  ```python Python theme={null}
  import requests

  video_id = "tsk_vid_01M59KNFZA2N4QFP0TMGACYH98"

  response = requests.post(
      f"https://toapis.com/v1/videos/{video_id}/extend",
      headers={
          "Authorization": "Bearer your-ToAPIs-key",
          "Content-Type": "application/json"
      },
      json={
          "model": "grok-imagine-video-official",
          "prompt": "Continue the scene, make the dog run towards the horizon",
          "duration": 6
      }
  )

  task = response.json()
  print(f"Task ID: {task['id']}")
  print(f"Status: {task['status']}")
  ```

  ```javascript JavaScript theme={null}
  const videoId = 'tsk_vid_01M59KNFZA2N4QFP0TMGACYH98';

  const response = await fetch(`https://toapis.com/v1/videos/${videoId}/extend`, {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer your-ToAPIs-key',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      model: 'grok-imagine-video-official',
      prompt: 'Continue the scene, make the dog run towards the horizon',
      duration: 6
    })
  });

  const task = await response.json();
  console.log(`Task ID: ${task.id}`);
  console.log(`Status: ${task.status}`);
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "id": "tsk_vid_01M59KTYQS81W0QENN56SEJ85S",
    "object": "generation.task",
    "model": "grok-imagine-video-official",
    "status": "queued",
    "progress": 0,
    "created_at": 1768380224,
    "metadata": {}
  }
  ```
</ResponseExample>


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