> ## Documentation Index > Fetch the complete documentation index at: https://evolink.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Kling-4.0 Video Edit > - Kling-4.0 Video Edit (kling-v4-video-edit) edits an existing video - The output keeps the original aspect ratio and audio. Duration matches the original video by default, or can be set with `duration` - Combine text instructions and reference images for editing - 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-v4-video-edit.json POST /v1/videos/generations openapi: 3.1.0 info: title: kling-v4-video-edit API description: Create video editing 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-v4-video-edit API description: >- - Kling-4.0 Video Edit (kling-v4-video-edit) edits an existing video - The output keeps the original aspect ratio and audio. Duration matches the original video by default, or can be set with `duration` - Combine text instructions and reference images for editing - 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: basic: summary: Basic Video Edit value: model: kling-v4-video-edit prompt: Adjust the color to warm tones and add a cinematic feel video_urls: - https://example.com/original.mp4 quality: 720p pro: summary: 1080P high quality value: model: kling-v4-video-edit prompt: >- Change the scene from daytime to nighttime and add neon light effects video_urls: - https://example.com/original.mp4 quality: 1080p duration: 10 style_reference: summary: Style Reference Edit value: model: kling-v4-video-edit prompt: >- Apply color grading based on the color tone and style of this reference image video_urls: - https://example.com/original.mp4 image_urls: - https://example.com/style_ref.jpg quality: 1080p 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, token invalid or expired content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: unauthorized message: Invalid or expired token type: authentication_error '402': description: Insufficient quota, top-up 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-v4-video-edit' 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 - video_urls properties: model: type: string description: Video generation model name enum: - kling-v4-video-edit default: kling-v4-video-edit example: kling-v4-video-edit prompt: type: string description: >- Editing instructions, up to 2500 characters **Reference syntax:** Use `<<>>` in the prompt to reference images and videos, for example: `Replace the coat worn by the person in <<>> with the style in <<>>` example: Adjust the color to warm tones and add a cinematic feel maxLength: 2500 video_urls: type: array description: >- Video URL array for editing. Exactly `1` clip is supported, referenced as `<<>>` in the prompt **Video requirements:** - Formats: MP4 / MOV - Size: ≤ 200MB - Duration: 3 to 30 seconds - Dimensions: width and height from 720px to 2160px - Frame rate: 24fps to 60fps - The video URL must be directly accessible by the server items: type: string format: uri minItems: 1 maxItems: 1 example: - https://example.com/original.mp4 image_urls: type: array description: >- Reference image URL array (style references) **Constraints:** Up to `10` images **Note:** Image URLs must be directly accessible by the server or trigger a direct download when accessed items: type: string format: uri example: - https://example.com/style_ref.jpg maxItems: 10 duration: description: |- Output video duration in seconds. Defaults to `auto` **Values:** - Integer: `3` to `30` seconds - `auto`: Match the original video duration oneOf: - type: integer minimum: 3 maximum: 30 - type: string enum: - auto default: auto example: auto quality: type: string description: |- Resolution tier **Options:** - `720p`: Standard 720P - `1080p`: High quality 1080P enum: - 720p - 1080p default: 720p example: 720p 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-v4-video-edit 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_second credits_reserved: type: number description: Estimated credits consumed minimum: 0 example: 63.92 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 ``` ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.