---
title: 函数：vdec_get_channel_desc_callback
description: "| C函数原型 | aclvdecCallback aclvdecGetChannelDescCallback(const aclvdecChannelDesc \*channelDesc) |"
url: https://www.hiascend.com/document/detail/zh/Atlas200IDKA2DeveloperKit/latest/Application%20Development%20Guide/aadgp/aclpythondevg_01_0345.html
sourcePath: /source/zh/Atlas200IDKA2DeveloperKit/23.0.RC2/Application Development Guide/aadgp/aclpythondevg_01_0345.html
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---
# 函数：vdec_get_channel_desc_callback

| C函数原型 | aclvdecCallback aclvdecGetChannelDescCallback(const aclvdecChannelDesc \*channelDesc) |
| --- | --- |
| Python函数 | callback = acl.media.vdec\_get\_channel\_desc\_callback(vdec\_channel\_desc) |
| 函数功能 | 获取视频解码处理通道描述信息的属性：回调函数。 |
| 输入说明 | vdec\_channel\_desc：int，vdec通道描述地址对象, 表示视频数据解码处理通道的描述信息。 |
| 返回值说明 | callback：python函数对象，回调函数。 Python侧格式如下： def vdec\_call\_back\_func(dvpp\_stream\_desc, dvpp\_pic\_desc, user\_data): pass |