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

# happyhorse-1.0-r2v

> Submit a video generation task with 1–3 reference images. Returns a `task_id` immediately. Poll `GET /v1/video/generations/{task_id}` for the result.




## OpenAPI

````yaml api-reference/model-api/alibaba/openapi/happyhorse-1.0-r2v/openapi.yaml POST /v1/video/generations
openapi: 3.1.0
info:
  title: HappyHorse 1.0 R2V
  description: >-
    Alibaba DashScope HappyHorse 1.0 reference-image-to-video generation via
    AnyFast API
  version: 1.0.0
servers:
  - url: https://www.anyfast.ai
security:
  - bearerAuth: []
paths:
  /v1/video/generations:
    post:
      summary: Create Reference-to-Video Task
      description: >
        Submit a video generation task with 1–3 reference images. Returns a
        `task_id` immediately. Poll `GET /v1/video/generations/{task_id}` for
        the result.
      operationId: createHappyhorse10R2v
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - model
                - prompt
                - images
              properties:
                model:
                  type: string
                  enum:
                    - happyhorse-1.0-r2v
                  description: Model ID.
                  example: happyhorse-1.0-r2v
                prompt:
                  type: string
                  description: Text description of the desired video.
                  example: A woman in a red qipao gracefully unfolds a folding fan
                images:
                  type: array
                  minItems: 1
                  maxItems: 3
                  items:
                    type: string
                  description: 1–3 reference image URLs.
                  example:
                    - https://example.com/ref1.jpg
                    - https://example.com/ref2.jpg
                    - https://example.com/ref3.jpg
                resolution:
                  type: string
                  enum:
                    - 720P
                    - 1080P
                  default: 1080P
                  description: Video resolution.
                  example: 720P
                ratio:
                  type: string
                  enum:
                    - '16:9'
                    - '9:16'
                    - '1:1'
                    - '4:3'
                    - '3:4'
                  default: '16:9'
                  description: Aspect ratio.
                  example: '16:9'
                duration:
                  type: integer
                  minimum: 3
                  maximum: 15
                  default: 5
                  description: Video duration in seconds.
                  example: 5
                watermark:
                  type: boolean
                  default: true
                  description: Whether to add the bottom-right "Happy Horse" watermark.
                  example: false
                seed:
                  type: integer
                  minimum: 0
                  maximum: 2147483647
                  description: Random seed for reproducibility.
                parameters:
                  type: object
                  description: >-
                    Optional alternative location for the same parameters
                    (DashScope-native style).
      responses:
        '200':
          description: Task created successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    example: asyntask_jwgfhsG0m2aDjLmiiELRf74eoWmss6ya
                  task_id:
                    type: string
                    example: asyntask_jwgfhsG0m2aDjLmiiELRf74eoWmss6ya
                  object:
                    type: string
                    example: video
                  model:
                    type: string
                    example: happyhorse-1.0-r2v
                  status:
                    type: string
                    example: queued
                  progress:
                    type: integer
                    example: 0
                  created_at:
                    type: integer
                    example: 1777343862
        '400':
          description: Invalid request
        '401':
          description: Unauthorized
        '429':
          description: Rate limit exceeded
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````