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

# Seedance Pro 1.5

> Generate videos using Volcano Engine Seedance 1.5 Pro model, supports text-to-video, image-to-video (first frame/keyframes), audio video, reference mode (async)

Generate videos using [Volcano Engine](https://www.volcengine.com)'s Seedance 1.5 Pro model, supporting multiple generation modes.

**Key Features:**

* **Multi-Mode Generation** - Supports text-to-video, image-to-video (first frame/keyframes), and reference mode
* **Native Audio Generation** - Generates synchronized voice, sound effects, and background music (place dialogue in double quotes for best results)
* **Draft Mode** - Quickly generate preview videos with fewer tokens consumed
* **Flexible Duration** - 4-12 seconds, or let the model auto-decide with `-1`
* **HD Resolution** - Supports 480p, 720p, and 1080p output


## OpenAPI

````yaml /en/openapi.yaml POST /generate/vol/seedance-pro-1.5
openapi: 3.0.0
info:
  contact:
    email: support@sinancode.com
    name: API Support
    url: https://sinancode.com/support
  description: AI Model Task Scheduling Platform API
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
  termsOfService: https://sinancode.com/terms-of-service
  title: TikTomato API
  version: '1.0'
servers:
  - url: https://api.sinancode.com/v1
    description: Production server
security: []
paths:
  /generate/vol/seedance-pro-1.5:
    post:
      tags:
        - public
      summary: Seedance Pro 1.5 Video Generation
      description: >-
        Generate videos using Volcano Engine Seedance 1.5 Pro model, supports
        text-to-video, image-to-video (first frame/keyframes), audio video,
        reference mode (async)
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/vol.CreateSeedancePro15TaskRequest'
        description: Task parameters
        required: true
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/dto.CreateTaskResponse'
        '400':
          description: Invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/apierror.ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/apierror.ErrorResponse'
        '500':
          description: Server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/apierror.ErrorResponse'
      security:
        - AccessToken: []
components:
  schemas:
    vol.CreateSeedancePro15TaskRequest:
      properties:
        camera_fixed:
          default: false
          description: |-
            Lock camera (optional, default false)
            Note: Not supported in image-to-video reference image mode
          example: false
          type: boolean
        draft:
          default: false
          description: >-
            Is draft mode (optional, default false)

            Seedance 1.5 feature: quickly generate preview video, consumes fewer
            tokens

            Note: Draft mode must use 480p resolution, does not support
            returning last frame
          example: false
          type: boolean
        duration:
          default: 5
          description: >-
            Video duration (optional, default 5 seconds)

            Range: 4-12 seconds, or set to -1 to let the model automatically
            choose duration
          example: 5
          maximum: 12
          minimum: -1
          type: integer
        first_frame:
          description: |-
            First frame image URL (optional)
            When provided, switches to image-to-video first frame mode
          example: https://example.com/first_frame.jpg
          type: string
        generate_audio:
          default: true
          description: >-
            Generate audio (optional, default true)

            Seedance 1.5 feature: generates sound synchronized with the video
            (voice, sound effects, background music)

            It's recommended to place dialogue parts in double quotes to
            optimize audio generation
          example: true
          type: boolean
        last_frame:
          description: >-
            Last frame image URL (optional)

            Must be used with first_frame, for image-to-video first-last frame
            mode
          example: https://example.com/last_frame.jpg
          type: string
        prompt:
          description: Prompt (required, recommended not to exceed 500 words)
          example: 女孩抱着狐狸，女孩睁开眼，温柔地看向镜头，狐狸友善地抱着，镜头缓缓拉出，女孩的头发被风吹动，可以听到风声
          maxLength: 2000
          minLength: 1
          type: string
        ratio:
          default: adaptive
          description: |-
            Aspect ratio (optional)
            Text-to-video default: adaptive
            Image-to-video default: adaptive (adapts to first frame)
            Available values: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, adaptive
          enum:
            - '16:9'
            - '4:3'
            - '1:1'
            - '3:4'
            - '9:16'
            - '21:9'
            - adaptive
          example: adaptive
          type: string
        resolution:
          default: 720p
          description: |-
            Resolution (optional, default 720p)
            Available values: 480p, 720p, 1080p
            Note: Draft mode only supports 480p
          enum:
            - 480p
            - 720p
            - 1080p
          example: 720p
          type: string
        watermark:
          default: false
          description: Add watermark (optional, default false)
          example: false
          type: boolean
      required:
        - prompt
      type: object
    dto.CreateTaskResponse:
      properties:
        task_id:
          description: Task ID
          example: 01234567-89ab-cdef-0123-456789abcdef
          type: string
      required:
        - task_id
      type: object
    apierror.ErrorResponse:
      properties:
        error_code:
          description: Machine-readable error code (e.g., TASK.INVALID_PARAMS)
          type: string
        message:
          description: User-friendly error message
          type: string
      type: object
  securitySchemes:
    AccessToken:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Please use your API Token for authentication

````