> ## 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.

# Seedance-1.0-Pro-Fast Video Generation

> - Seedance 1.0 Pro Fast (doubao-seedance-1.0-pro-fast) model supports multiple generation modes including text-to-video and image-to-video
- Asynchronous processing mode, use the returned task ID to [query](/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/seedance1.0/seedance-1.0-pro-fast-video-generate.json POST /v1/videos/generations
openapi: 3.1.0
info:
  title: doubao-seedance-1.0-pro-fast API
  description: >-
    Create video generation tasks using AI models, supporting text-to-video
    generation mode
  license:
    name: MIT
  version: 1.0.0
servers:
  - url: https://api.evolink.ai
    description: Production environment
security:
  - bearerAuth: []
tags:
  - name: Video Generation
    description: AI video generation related APIs
paths:
  /v1/videos/generations:
    post:
      tags:
        - Video Generation
      summary: doubao-seedance-1.0-pro-fast API
      description: >-
        - Seedance 1.0 Pro Fast (doubao-seedance-1.0-pro-fast) model supports
        multiple generation modes including text-to-video and image-to-video

        - Asynchronous processing mode, use the returned task ID to
        [query](/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:
              text_to_video_basic:
                summary: Text to Video (Basic)
                value:
                  model: doubao-seedance-1.0-pro-fast
                  prompt: A cat playing piano
      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:
                    doubao-seedance-1.0-pro-fast
                  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
      properties:
        model:
          type: string
          description: Video generation model name
          enum:
            - doubao-seedance-1.0-pro-fast
          default: doubao-seedance-1.0-pro-fast
          example: doubao-seedance-1.0-pro-fast
        prompt:
          type: string
          description: >-
            Prompt describing the video you want to generate, limited to 2000
            tokens
          example: A cat playing piano
          maxLength: 2000
        duration:
          type: integer
          description: >-
            Specifies the duration of the generated video (in seconds), defaults
            to `5` seconds


            **Note:**

            - Supports any integer value between `2` and `12` seconds

            - Billing for a single request is based on the `duration` value;
            longer durations result in higher costs
          minimum: 2
          maximum: 12
        quality:
          type: string
          description: >-
            Video resolution, defaults to `1080p`


            **Note:**

            - `480p`: Lower resolution, lower pricing

            - `720p`: Standard definition, standard pricing

            - `1080p`: High definition, higher pricing, this is the default
            value
          enum:
            - 480p
            - 720p
            - 1080p
          example: 1080p
        aspect_ratio:
          type: string
          description: >-
            Video aspect ratio


            **Text-to-video mode:**

            - Default value: `16:9`

            - Supported values: `16:9` (landscape), `9:16` (portrait), `1:1`
            (square), `4:3`, `3:4`, `21:9` (ultra-wide)


            **Image-to-video mode (when using image_urls):**

            - Default value: `adaptive`

            - Supported values: In addition to the above 6 ratios, also supports
            `keep_ratio` (keep original aspect ratio) and `adaptive` (adaptive)
          example: '16:9'
        image_urls:
          type: array
          description: >-
            Reference image URL list for image-to-video functionality


            **Note:**

            - Number of images supported per request: `1` image

            - Image size: Not exceeding `10MB`

            - Supported file formats: `.jpg`, `.jpeg`, `.png`, `.webp`

            - Image URLs must be directly viewable by the server, or the URL
            should trigger a direct download when accessed (typically these URLs
            end with image extensions like `.png`, `.jpg`)
          items:
            type: string
            format: uri
          maxItems: 1
          example:
            - https://example.com/image.jpg
        callback_url:
          type: string
          description: >-
            HTTPS callback URL after task completion


            **Callback timing:**

            - Triggered when task is completed, failed, or cancelled

            - Sent after billing confirmation is completed


            **Security restrictions:**

            - Only HTTPS protocol is supported

            - Callbacks to internal network 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 of `3` retries after failure (retries occur after
            `1`/`2`/`4` seconds following failure)

            - Callback response body format is consistent with task query API
            response format

            - Callback URL returning 2xx status code is considered successful;
            other status codes will trigger retries
          format: uri
          example: https://your-domain.com/webhooks/video-task-completed
    VideoGenerationResponse:
      type: object
      properties:
        created:
          type: integer
          description: Task creation timestamp
          example: 1761313744
        id:
          type: string
          description: Task ID
          example: task-unified-1761313744-vux2jw0k
        model:
          type: string
          description: Actual model name used
          example: doubao-seedance-1.0-pro-fast
        object:
          type: string
          enum:
            - video.generation.task
          description: Specific type of the task
        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 detailed information
        type:
          type: string
          enum:
            - text
            - image
            - audio
            - video
          description: Output type of the task
          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: 165
        video_duration:
          type: integer
          description: Video duration (seconds)
          example: 8
    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: 8
        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

        ```

````