> ## Documentation Index > Fetch the complete documentation index at: https://docs.evolink.ai/llms.txt > Use this file to discover all available pages before exploring further. # Kling-O1 Image to Video > - Kling-O1 Image to Video (kling-o1-image-to-video) model supports image-to-video generation - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly ## OpenAPI ````yaml /en/api-manual/video-series/kling/kling-o1-image-to-video.json POST /v1/videos/generations openapi: 3.1.0 info: title: kling-o1-image-to-video API description: Create image-to-video tasks using AI models license: name: MIT version: 1.0.0 servers: - url: https://api.evolink.ai description: Production security: - bearerAuth: [] tags: - name: Video Generation description: AI video generation APIs paths: /v1/videos/generations: post: tags: - Video Generation summary: kling-o1-image-to-video API description: >- - Kling-O1 Image to Video (kling-o1-image-to-video) model supports image-to-video generation - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly operationId: createVideoGeneration requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/VideoGenerationRequest' examples: first_frame: summary: First Frame Image to Video value: model: kling-o1-image-to-video prompt: A cat walking gracefully image_urls: - https://example.com/first-frame.jpg first_last_frame: summary: First and Last Frame Image to Video value: model: kling-o1-image-to-video prompt: A cat walking gracefully image_urls: - https://example.com/first-frame.jpg - https://example.com/last-frame.jpg responses: '200': description: Video generation task created successfully content: application/json: schema: $ref: '#/components/schemas/VideoGenerationResponse' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: invalid_request message: Invalid request parameters type: invalid_request_error '401': description: Unauthenticated, invalid or expired token content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: unauthorized message: Invalid or expired token type: authentication_error '402': description: Insufficient quota, recharge required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: insufficient_quota message: Insufficient quota. Please top up your account. type: insufficient_quota '403': description: Access denied content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: model_access_denied message: 'Token does not have access to model: kling-o1-image-to-video' type: invalid_request_error '429': description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: rate_limit_exceeded message: Too many requests, please try again later type: rate_limit_error '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: internal_error message: Internal server error type: api_error components: schemas: VideoGenerationRequest: type: object required: - model - prompt - image_urls properties: model: type: string description: Video generation model name enum: - kling-o1-image-to-video default: kling-o1-image-to-video example: kling-o1-image-to-video prompt: type: string description: Prompt describing what video to generate example: A cat walking gracefully maxLength: 5000 image_urls: type: array description: >- Reference image URL list for image-to-video generation **Note:** - Supports `1` to `2` images per request (`1` image for first-frame video generation, `2` images for first-and-last-frame video generation) - Image size: up to `10MB` - Supported formats: `.jpg`, `.jpeg`, `.png`, `.webp` - Image URL must be directly accessible by the server, or the URL should trigger a direct download when accessed (typically URLs ending with image extensions like `.png`, `.jpg`) items: type: string format: uri minItems: 1 maxItems: 2 example: - https://example.com/image1.jpg aspect_ratio: type: string description: |- Video aspect ratio **Options:** - `16:9`: Landscape video - `9:16`: Portrait video - `1:1`: Square video enum: - '16:9' - '9:16' - '1:1' example: '16:9' duration: type: integer description: >- Video duration in seconds, defaults to `5` seconds **Note:** - Only supports `5` or `10` values, representing `5 seconds` or `10 seconds` - Billing is based on the `duration` value, longer duration costs more enum: - 5 - 10 default: 5 example: 5 callback_url: type: string description: >- HTTPS callback URL for task completion **Callback Timing:** - Triggered when task is completed, failed, or cancelled - Sent after billing confirmation **Security Restrictions:** - HTTPS protocol only - Internal IP addresses are prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.) - URL length must not exceed `2048` characters **Callback Mechanism:** - Timeout: `10` seconds - Maximum `3` retries after failure (at `1`/`2`/`4` seconds after failure) - Callback response format is consistent with task query API - 2xx status code is considered successful, other codes trigger retry format: uri example: https://your-domain.com/webhooks/video-task-completed VideoGenerationResponse: type: object properties: created: type: integer description: Task creation timestamp example: 1757169743 id: type: string description: Task ID example: task-unified-1757169743-7cvnl5zw model: type: string description: Actual model name used example: kling-o1-image-to-video object: type: string enum: - video.generation.task description: Task type progress: type: integer description: Task progress percentage (0-100) minimum: 0 maximum: 100 example: 0 status: type: string description: Task status enum: - pending - processing - completed - failed example: pending task_info: $ref: '#/components/schemas/VideoTaskInfo' description: Video task details type: type: string enum: - text - image - audio - video description: Task output type example: video usage: $ref: '#/components/schemas/VideoUsage' description: Usage and billing information ErrorResponse: type: object properties: error: type: object properties: code: type: string description: Error code identifier message: type: string description: Error description type: type: string description: Error type VideoTaskInfo: type: object properties: can_cancel: type: boolean description: Whether the task can be cancelled example: true estimated_time: type: integer description: Estimated completion time (seconds) minimum: 0 example: 300 video_duration: type: integer description: Video duration (seconds) example: 9 VideoUsage: type: object description: Usage and billing information properties: billing_rule: type: string description: Billing rule enum: - per_call - per_token - per_second example: per_call credits_reserved: type: number description: Estimated credits consumed minimum: 0 example: 7 user_group: type: string description: User group category example: default securitySchemes: bearerAuth: type: http scheme: bearer description: >- ## All APIs require Bearer Token authentication ## **Get API Key:** Visit [API Key Management Page](https://evolink.ai/dashboard/keys) to get your API Key **Add to request header:** ``` Authorization: Bearer YOUR_API_KEY ``` ````