> ## 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.

# Tải xuống nội dung video Wan

> Tải xuống tệp MP4 đã hoàn tất cho một tác vụ video Wan thông qua route content.

Sử dụng endpoint này để tải xuống tệp MP4 cho một tác vụ video Wan đã hoàn tất. Nếu tác vụ vẫn đang chạy, API sẽ trả về lỗi JSON thay vì các byte video.

## Trước khi tải xuống

* Tạo một tác vụ bằng [Tạo video Wan](./create).
* Thăm dò bằng [Truy xuất video Wan](./retrieve) cho đến khi `status` là `completed`.
* Truyền cùng task ID vào endpoint này.

## Lưu trữ media đã hoàn tất

Phần thân phản hồi là nội dung nhị phân `video/mp4`. Hãy lưu các byte vào hệ thống lưu trữ của riêng bạn khi ứng dụng của bạn cần truy cập bền vững vào media đã được tạo.


## OpenAPI

````yaml api/openapi/video/wan/get-retrieve-content.openapi.json GET /v1/videos/{task_id}/content
openapi: 3.1.0
info:
  title: Wan Video Content API
  version: 1.0.0
  description: >-
    Download the completed MP4 file for a Wan video task. The endpoint returns
    binary video content on success and a JSON error if the task is not ready.
servers:
  - url: https://api.cometapi.com
security:
  - bearerAuth: []
paths:
  /v1/videos/{task_id}/content:
    get:
      summary: Download Wan video content
      description: >-
        Download the generated MP4 file after a Wan video task reaches completed
        status.
      operationId: wan_retrieve_video_content
      parameters:
        - name: task_id
          in: path
          required: true
          description: Task ID returned by POST /v1/videos.
          schema:
            type: string
          example: task_example
      responses:
        '200':
          description: Binary MP4 video content.
          content:
            video/mp4:
              schema:
                type: string
                format: binary
        '400':
          description: The task is not completed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  message: 'Task is not completed yet, current status: IN_PROGRESS'
                  type: invalid_request_error
        '404':
          description: The task ID does not match a task for the authenticated user.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  message: Task not found
                  type: invalid_request_error
      security:
        - bearerAuth: []
      x-codeSamples:
        - lang: Shell
          label: Download MP4
          source: |-
            curl https://api.cometapi.com/v1/videos/<TASK_ID>/content \
              -H "Authorization: Bearer $COMETAPI_KEY" \
              --output output.mp4
        - lang: Python
          label: Download MP4
          source: |
            import os
            from pathlib import Path

            import requests

            TASK_ID = "<TASK_ID>"
            response = requests.get(
                f"https://api.cometapi.com/v1/videos/{TASK_ID}/content",
                headers={"Authorization": "Bearer " + os.environ["COMETAPI_KEY"]},
                timeout=300,
            )
            response.raise_for_status()
            Path("output.mp4").write_bytes(response.content)
        - lang: JavaScript
          label: Download MP4
          source: |
            import { writeFile } from "node:fs/promises";

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

            if (!response.ok) {
              throw new Error(await response.text());
            }

            const video = new Uint8Array(await response.arrayBuffer());
            await writeFile("output.mp4", video);
components:
  schemas:
    ErrorResponse:
      description: >-
        Error body. Validation errors can use a top-level code and message,
        while authentication errors can use an error object.
      oneOf:
        - type: object
          required:
            - message
          properties:
            code:
              type:
                - string
                - 'null'
              description: Short error code.
            message:
              type: string
              description: Human-readable error message.
          additionalProperties: true
        - type: object
          required:
            - error
          properties:
            error:
              type: object
              required:
                - message
              properties:
                message:
                  type: string
                  description: Human-readable error message.
                type:
                  type: string
                  description: Error category.
                code:
                  type:
                    - string
                    - 'null'
                  description: Short error code.
              additionalProperties: true
          additionalProperties: true
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Bearer authentication. Use your CometAPI API key.

````