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

# 下载 Sora 2 视频内容

> 通过 CometAPI 中的 GET /v1/videos/{video_id}/content 获取已生成的 Sora 2 视频二进制数据，以便按 video_id 下载已完成的视频输出。

使用此端点可在任务达到 `completed` 后下载最终的 Sora 输出。在此之前，它会返回错误而不是视频文件。

## 下载前须知

* 等待 [获取视频](./retrieve) 返回 `status: completed`
* 传入创建步骤中的 `video_id`
* 如果你需要文件在提供商的临时交付窗口结束后仍可用，请将其存储到你自己的 bucket 或 CDN 中

## 下载流程

<Steps>
  <Step title="创建视频">
    先从 [创建视频](./create) 开始。
  </Step>

  <Step title="轮询直到完成">
    使用 [获取视频](./retrieve) 直到任务达到 `completed`。
  </Step>

  <Step title="获取二进制文件">
    调用此端点以下载 MP4 或其他受支持的资源变体。
  </Step>
</Steps>

## 临时交付窗口

渲染完成后，请尽快获取文件。提供商的交付 URL 不是永久有效的。


## OpenAPI

````yaml api/openapi/video/sora-2/get-retrieve-content.openapi.json GET /v1/videos/{video_id}/content
openapi: 3.1.0
info:
  title: Retrieve Video Content API
  version: 1.0.0
  description: >-
    Download the finished Sora asset for a completed video job. The endpoint
    returns binary content on success and a JSON error if the job is not ready.
servers:
  - url: https://api.cometapi.com
security:
  - bearerAuth: []
paths:
  /v1/videos/{video_id}/content:
    get:
      summary: Download finished Sora video content
      description: >-
        Call this endpoint only after GET /v1/videos/{video_id} reports a
        completed job. Before completion, CometAPI returns a JSON error response
        instead of a file. Shortly after completion the file can still be
        propagating; a transient `502` from this endpoint resolves on retry.
      operationId: retrieve_video_content
      parameters:
        - name: video_id
          in: path
          required: true
          description: Completed video id.
          schema:
            type: string
        - name: variant
          in: query
          required: false
          description: >-
            Optional content variant such as the main video, thumbnail, or
            spritesheet when supported by the provider.
          schema:
            type: string
      responses:
        '200':
          description: Binary video content.
          content:
            video/mp4:
              schema:
                type: string
                format: binary
        '400':
          description: The job is not ready yet.
          content:
            application/json:
              schema:
                type: object
                required:
                  - error
                properties:
                  error:
                    type: object
                    required:
                      - message
                      - type
                    properties:
                      message:
                        type: string
                      type:
                        type: string
                example:
                  error:
                    message: 'Task is not completed yet, current status: IN_PROGRESS'
                    type: invalid_request_error
      x-codeSamples:
        - lang: Shell
          label: Default
          source: |
            VIDEO_ID="<video_id>"

            curl -L "https://api.cometapi.com/v1/videos/$VIDEO_ID/content" \
              -H "Authorization: Bearer $COMETAPI_KEY" \
              -o video.mp4
        - lang: Python
          label: Default
          source: |
            import os
            import requests

            video_id = "<video_id>"

            response = requests.get(
                f"https://api.cometapi.com/v1/videos/{video_id}/content",
                headers={"Authorization": "Bearer " + os.environ["COMETAPI_KEY"]},
            )
            response.raise_for_status()

            with open("video.mp4", "wb") as f:
                f.write(response.content)
        - lang: JavaScript
          label: Default
          source: >
            import { writeFile } from "node:fs/promises";


            const videoId = "<video_id>";


            const response = await
            fetch(`https://api.cometapi.com/v1/videos/${videoId}/content`, {
                headers: { Authorization: `Bearer ${process.env.COMETAPI_KEY}` },
            });


            await writeFile("video.mp4", Buffer.from(await
            response.arrayBuffer()));
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Bearer token authentication. Use your CometAPI key.

````