Image To Video

Image to Video

Use Kling AI to generate a short video (5 or 10 seconds) from a single image. Supports multiple model versions and optional text prompts to guide the generated content. The API is asynchronous — submit a task and then poll for status until completion.

Capability Overview

Response Example

{
  "code": 0,
  "message": "success",
  "data": {
    "task_id": "task_abc123",
    "task_status": "succeed",
    "task_result": {
      "videos": [
        {
          "id": "video_123",
          "url": "https://example.com/video.mp4",
          "duration": "5.0"
        }
      ]
    }
  }
}

End-to-End Workflow (Async Polling)

1. Submit task (POST /v1/videos/image2video)  →  obtain task_id
2. Poll status (GET /v1/videos/image2video/{task_id})  →  every 7 seconds
3. When task_status === "succeed"  →  retrieve video URL from task_result.videos[0].url
4. Download the video URL to local storage / Supabase Storage

Polling Pattern Code (SKILL.md Main Workflow)

async function generateAndWait(
  submitFn: () => Promise<{ taskId: string }>
): Promise<{ videoUrl: string; duration: string }> {
  const { taskId } = await submitFn();

  const POLL_INTERVAL_MS = 7000;         // poll every 7 seconds
  const TIMEOUT_MS = 10 * 60 * 1000;    // maximum 10 minutes
  const deadline = Date.now() + TIMEOUT_MS;

  while (Date.now() < deadline) {
    await new Promise(r => setTimeout(r, POLL_INTERVAL_MS));
    const result = await queryTask(taskId);
    if (result.task_status === "succeed") {
      const video = result.task_result.videos[0];
      return { videoUrl: video.url, duration: video.duration };
    }
    if (result.task_status === "failed") {
      throw new Error(`Task failed: ${result.task_status_msg ?? "unknown reason"}`);
    }
    // submitted / processing → continue polling
  }
  throw new Error(`Task ${taskId} timed out after 10 minutes`);
}

Generation-Time Usage (Agent Direct Call)

For full parameter documentation and generation-time code, refer to:

• references/submit-api.md — Submit task endpoint (POST)
• references/query-api.md — Query task endpoint (GET)

Generation-time file download (required):

The video URL returned by the API is a temporary CDN link. Once the URL is obtained, you must immediately download the file to local storage using the Bash tool so the user can view the result.

curl -L -o ./output_video.mp4 "<generated video URL>"

Complete generation-time workflow (including download step):

1. Call the submit function to obtain task_id
2. Poll the query endpoint until task_status === "succeed"
3. Retrieve task_result.videos[0].url
4. Use the Bash tool to run curl -L -o ./output_video.mp4 "<url>" to download the video locally
5. Inform the user that the file has been saved to the corresponding path

Note: Upstream CDN links are time-limited. Download immediately after obtaining the URL — do not delay.

Post-Generation Usage (In-App via Edge Function)

In-app integration requires two Edge Functions: one to submit the task and one to query status and download the video. For complete Edge Function code and frontend call examples, refer to:

• references/submit-api.md — Submit task Edge Function and frontend call
• references/query-api.md — Query task Edge Function (including Supabase Storage video transfer) and frontend call

Notes

• Key security: INTEGRATIONS_API_KEY must only be read server-side in Edge Functions — never expose it to the frontend.
• Base64 image format: When using Base64, provide only the pure Base64 string — do not include the data:image/png;base64, prefix.
• Error handling: Always handle 429 (quota exceeded) and 402 (insufficient balance).
• Billing: The submit endpoint is billed per request (discounted price ¥70.00 / request); the query endpoint is free. Avoid unnecessary repeated submissions caused by parameter errors.
• Concurrency limit: For the same account, keep concurrent submission counts under control to avoid rate limiting.