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服务端错误码

SUCCESS(0) 成功

TOKEN_AUTHZ_FAIL(-100) imtoken认证失败

ILLEGAL_RIGHTS(-101) 权限不够，比如观众不允许发布流

REQUEST_PARAMS_ERROR(-200) 请求参数不正确

CONFR_NOT_EXIST(-301) 会议不存在，可能是超时</description>
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网络异常和用户异常退出的处理

关于一对一音视频和多人音视频过程中网络异常等事件的处理，建议如下：

1.本机网络信号不好，会收到SDK发出的回调

APP可以利用此回调展示网络不好的提示</description>
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        <description>音视频云概览

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概述

音视频与即时通讯使用同一套用户体系，在使用音视频功能前，需登录环信用户帐号。

产品特性

	*  支持超低延迟的语音通话和视频通话
	*  支持1对1通话时进行P2P传输</description>
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