> ## 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.

# HappyHorse 1.0 Image-to-Video 图生视频

> - HappyHorse 1.0 图生视频，输入 1 张首帧图像生成视频
- `prompt` 可选（不传时由首帧自由演绎）
- 输出宽高比由首帧自动决定，**不支持** `aspect_ratio`
- 异步处理模式，使用返回的任务ID [进行查询](/cn/api-manual/task-management/get-task-detail)
- 生成的视频链接，有效期为24小时，请尽快保存



## OpenAPI

````yaml cn/api-manual/video-series/happyhorse1.0/happyhorse-1.0-image-to-video.json POST /v1/videos/generations
openapi: 3.1.0
info:
  title: HappyHorse 1.0 Image-to-Video 接口
  description: HappyHorse 1.0 图生视频接口，基于首帧图像生成视频
  license:
    name: MIT
  version: 1.0.0
servers:
  - url: https://api.evolink.ai
    description: 生产环境
security:
  - bearerAuth: []
tags:
  - name: 视频生成
    description: AI视频生成相关接口
paths:
  /v1/videos/generations:
    post:
      tags:
        - 视频生成
      summary: HappyHorse 1.0 Image-to-Video 图生视频
      description: >-
        - HappyHorse 1.0 图生视频，输入 1 张首帧图像生成视频

        - `prompt` 可选（不传时由首帧自由演绎）

        - 输出宽高比由首帧自动决定，**不支持** `aspect_ratio`

        - 异步处理模式，使用返回的任务ID
        [进行查询](/cn/api-manual/task-management/get-task-detail)

        - 生成的视频链接，有效期为24小时，请尽快保存
      operationId: createHappyHorse10ImageToVideo
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/VideoGenerationRequest'
            examples:
              basic:
                summary: 基础图生视频
                value:
                  model: happyhorse-1.0-image-to-video
                  prompt: 让画面中的猫在草地上奔跑
                  image_urls:
                    - https://cdn.example.com/cat.png
                  quality: 720p
                  duration: 5
              no_prompt:
                summary: 首帧自由演绎（无 prompt）
                value:
                  model: happyhorse-1.0-image-to-video
                  image_urls:
                    - https://cdn.example.com/landscape.jpg
                  quality: 1080p
                  duration: 5
                  seed: 12345
      responses:
        '200':
          description: 视频生成任务创建成功
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VideoGenerationResponse'
        '400':
          description: 请求参数错误
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: invalid_request
                  message: Invalid request parameters
                  type: invalid_request_error
        '401':
          description: 未认证、Token无效或过期
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: unauthorized
                  message: Invalid or expired token
                  type: authentication_error
        '402':
          description: 配额不足、需要充值
          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: 无权限访问
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: model_access_denied
                  message: >-
                    Token does not have access to model:
                    happyhorse-1.0-image-to-video
                  type: invalid_request_error
        '429':
          description: 请求频率超限
          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: 服务器内部错误
          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
        - image_urls
      properties:
        model:
          type: string
          description: 视频生成模型名称
          enum:
            - happyhorse-1.0-image-to-video
          default: happyhorse-1.0-image-to-video
          example: happyhorse-1.0-image-to-video
        prompt:
          type: string
          description: |-
            文本提示词，**可选**（不传时由首帧自由演绎）

            **长度限制：**
            - 中文：最多 `2500` 个字符
            - 非中文：最多 `5000` 个字符
            - 超长部分将被自动截断
          example: 让画面中的猫在草地上奔跑
        image_urls:
          type: array
          description: |-
            首帧图像 URL，**必填**（取数组第 1 张作为首帧）

            **输入图片要求：**
            - 支持格式：JPEG、JPG、PNG、WEBP
            - 分辨率：宽高均 ≥ `300` 像素
            - 宽高比：`1:2.5` ~ `2.5:1`
            - 单张大小：≤ `10MB`
            - 图像 URL 必须**公网可访问（HTTP 或 HTTPS）**，不支持私有 OSS、内网或需要鉴权的链接
          items:
            type: string
            format: uri
          minItems: 1
          maxItems: 1
          example:
            - https://cdn.example.com/cat.png
        quality:
          type: string
          description: |-
            视频分辨率档位，默认为 `720p`

            **可选值：**
            - `720p`：标准清晰度，此为默认值
            - `1080p`：高清清晰度

            **计费提示：** 分辨率档位直接影响计费，详见模型计费规则
          enum:
            - 720p
            - 1080p
          default: 720p
          example: 720p
        duration:
          type: integer
          description: |-
            视频时长（秒），默认为 `5` 秒

            **取值范围：**
            - 整数 `3` ~ `15`
            - 时长与计费直接相关
          default: 5
          minimum: 3
          maximum: 15
          example: 5
        seed:
          type: integer
          description: |-
            随机种子，默认随机

            **说明：**
            - 取值范围：`1` ~ `2147483647`
            - 固定 seed 可在调试 prompt 时降低参数变化的干扰，提升结果可复现性
          minimum: 1
          maximum: 2147483647
          example: 42
        callback_url:
          type: string
          description: |-
            任务完成后的 HTTPS 回调地址

            **回调时机：**
            - 任务完成（completed）、失败（failed）或取消（cancelled）时触发
            - 在计费确认完成后发送

            **安全限制：**
            - 仅支持 HTTPS 协议
            - 禁止回调到内网 IP 地址（127.0.0.1、10.x.x.x、172.16-31.x.x、192.168.x.x 等）
            - URL 长度不超过 `2048` 字符

            **回调机制：**
            - 超时时间：`10` 秒
            - 失败后最多重试 `3` 次（分别在失败后 `1`/`2`/`4` 秒重试）
            - 回调响应体格式与任务查询接口返回格式一致
            - 返回 2xx 状态码视为成功，其他状态码触发重试
          format: uri
          example: https://your-domain.com/webhooks/video-task-completed
    VideoGenerationResponse:
      type: object
      properties:
        created:
          type: integer
          description: 任务创建时间戳
          example: 1761313744
        id:
          type: string
          description: 任务ID
          example: task-unified-1761313744-h1i2vcd9
        model:
          type: string
          description: 实际使用的模型名称
          example: happyhorse-1.0-image-to-video
        object:
          type: string
          enum:
            - video.generation.task
          description: 任务的具体类型
        progress:
          type: integer
          description: 任务进度百分比 (0-100)
          minimum: 0
          maximum: 100
          example: 0
        status:
          type: string
          description: 任务状态
          enum:
            - pending
            - processing
            - completed
            - failed
            - cancelled
          example: pending
        task_info:
          $ref: '#/components/schemas/VideoTaskInfo'
          description: 视频任务详细信息
        type:
          type: string
          enum:
            - text
            - image
            - audio
            - video
          description: 任务的输出类型
          example: video
        usage:
          $ref: '#/components/schemas/VideoUsage'
          description: 使用量和计费信息
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: 错误代码标识符
            message:
              type: string
              description: 错误描述信息
            type:
              type: string
              description: 错误类型
    VideoTaskInfo:
      type: object
      properties:
        can_cancel:
          type: boolean
          description: 任务是否可以取消
          example: true
        estimated_time:
          type: integer
          description: 预估完成时间（秒）
          minimum: 0
          example: 2400
        video_duration:
          type: integer
          description: 视频时长（秒）
          example: 5
    VideoUsage:
      type: object
      description: 使用量和计费信息
      properties:
        billing_rule:
          type: string
          description: 计费规则
          enum:
            - per_call
            - per_token
            - per_second
          example: per_second
        credits_reserved:
          type: number
          description: 预估消耗积分数
          minimum: 0
          example: 607500
        user_group:
          type: string
          description: 用户组类别
          example: default
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: |-
        ##所有接口均需要使用Bearer Token进行认证##

        **获取 API Key：**

        访问 [API Key 管理页面](https://evolink.ai/dashboard/keys) 获取您的 API Key

        **使用时在请求头中添加：**
        ```
        Authorization: Bearer YOUR_API_KEY
        ```

````