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

# 下载视频

> 请求格式、响应与能力边界。

`GET /v1/videos/{task_id}/content`

仅对已完成且属于当前用户/项目范围的任务下载。未完成通常返回 400，找不到返回 404，内容已失效可能返回 410。

成功响应是视频字节，常见 MP4；不要解析成任务 JSON。`Range` 支持取决于内容源，可能返回 206 或 416，也可能返回完整 200 响应。断点续传必须核对状态和 Content-Range，不能盲目追加。

该入口仍需 Bearer 认证。没有保证上游 `variant=thumbnail` 等扩展参数可用；使用本页所述内容入口。

[完整接入指南与可执行示例](/zh/guides/video-generation.md)

[Read in English](/en/api-reference/videos-content.md)


## OpenAPI

````yaml openapi/relay.json GET /v1/videos/{task_id}/content
openapi: 3.0.3
info:
  title: API — Core inference API
  version: 0.5.0
  description: >-
    面向接入的精选规范，不是全部管理或供应商接口。 / Curated integration specification, not the entire
    management or provider API.
  license:
    name: AGPL-3.0-or-later
servers:
  - url: https://gateway.example.com
    description: >-
      Example only; replace with your gateway origin and optional path prefix,
      without /v1.
security:
  - BearerAuth: []
paths:
  /v1/videos/{task_id}/content:
    get:
      summary: 下载视频 / Download video
      description: >-
        常用接入字段；能力取决于模型、渠道与部署。 / Common integration fields; support depends on
        the model, channel, and deployment.
      operationId: GETVideosContent
      parameters:
        - name: task_id
          in: path
          required: true
          schema:
            type: string
          description: >-
            同一用户/项目范围内的网关公开 ID / Public gateway ID in the same user/project
            scope
        - name: Range
          in: header
          schema:
            type: string
          description: >-
            单段字节范围，支持情况由内容源决定 / Single byte range when supported by the content
            source
          example: bytes=0-1023
      responses:
        '200':
          description: 视频二进制；先检查 HTTP 状态 / Video bytes; check HTTP status first
          content:
            video/mp4:
              schema:
                type: string
                format: binary
            application/octet-stream:
              schema:
                type: string
                format: binary
        '206':
          description: 部分字节；依赖内容源支持 / Partial bytes when supported
          content:
            video/mp4:
              schema:
                type: string
                format: binary
        '400':
          description: 请求参数错误 / Invalid request
        '401':
          description: 身份校验失败 / Authentication failed
        '403':
          description: 访问被拒绝 / Access denied
        '404':
          description: 接口或资源不存在 / Endpoint or resource not found
        '410':
          description: 内容已不可用 / Content no longer available
        '416':
          description: 字节范围不可满足 / Unsatisfiable byte range
        '429':
          description: 请求被限流或受配额限制 / Rate or quota restriction
        '500':
          description: 网关或上游错误 / Gateway or upstream error
        '502':
          description: 内容代理或上游失败 / Content proxy or upstream failure
        '503':
          description: 服务暂不可用 / Service unavailable
        default:
          description: 其他网关或上游错误；格式可能不同 / Other gateway or upstream error; shape may vary
components:
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: 模型调用 API Key，不是控制台登录凭据 / Model API key, not console login credentials

````

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