# 云端直播推流

var mixerID = "1";

var recordWidth = 640; //录制画布的宽高
var recordHeight = 360;

var SWidth = recordWidth; //图像占据宽高
var rate = 16/9; //假设图像比例为16：9
var SHeight = recordWidth/rate;

var mutiMixerCfgs; //配置混图器编码参数
var mutiMixerContents; //配置混图器内容
var mutiMixerOutputs; //配置混图器输出

    mutiMixerCfgs = [
        {
            "id": mixerID,
			"cfg":  {"width":recordWidth,
                    "height":recordHeight,
                    "frameRate":8,
                    "bitRate":350000,
                    "defaultQP":28,
                    "gop":120
                    };
        }
    ];


//配置混图器内容： 左右布局(示例图如下)，左边为user1的1号摄像头， 右边为user2的1号摄像头
var mixerContents = [];
var leftCon = {}, rightCon = {};  //左右视频图像的内容配置
leftCon["type"] = 0; //0： 录制类型为视频
leftCon["left"] = 0 ;
leftCon["top"] = (recordHeight-sHeight/2)/2;   //视频图像垂直居中
leftCon["width"] = sWidth/2;
leftCon["height"] =  sHeight/2;
leftCon["param"] = {"camid":"user1.1"};
leftCon["keepAspectRatio"] = 1;
mixerContents.push(leftCon);

rightCon["type"] = 0; //0： 录制类型为视频
rightCon["left"] = sWidth/2;
rightCon["top"] = (recordHeight-sHeight/2)/2;   //视频图像垂直居中
rightCon["width"] = sWidth/2;
rightCon["height"] =  sHeight/2;
rightCon["param"] = {"camid":"user2.1"};
rightCon["keepAspectRatio"] = 1;
mixerContents.push(rightCon);
      
    mutiMixerContents = [
        {
            "id": mixerID,
            "content": mixerContents
        }
    ];
    mutiMixerOutputs = [ 
        {
            "id": mixerID,
			"output": [
				{"type":1,"liveUrl": "rtmp://xxx"} //配置推流地址,地址来自 步骤1获取的推流地址
				]
        }
    ];

    var rst = CRVideo_StartSvrMixer(mutiMixerCfgs, mutiMixerContents, mutiMixerOutputs);
    if(rst != CRVideo_NOERR){
        console.log("开启 云端直播推流 出错！ 错误码："+ rst);
        return;
    }

//云端直播推流状态变化通知 
CRVideo_SvrMixerStateChanged.callback = function(state, err, operatorID)
{
	console.log("CRVideo_SvrMixerStateChanged, state="+state+",  err:"+err+",    operatorID"+ operatorID);
}

var mixerID = "1";
var recordWidth = 640; //录制画布的宽高
var recordHeight = 360;

var SWidth = recordWidth; //图像占据宽高
var rate = 16/9; //假设图像比例为16：9
var SHeight = recordWidth/rate;

//更新录制布局为：画中画

//混图器内容：画中画布局(示例图如下， 底层640*360， 上层160*90)，底层为user1的1号摄像头， 上层为user2的1号摄像头
var mixerContents = [];
var leftCon = {}, rightCon = {};  //左右视频图像的内容配置
leftCon["type"] = 0; //0： 录制类型为视频
leftCon["left"] = 0 ;
leftCon["top"] = 0;   //视频图像垂直居中
leftCon["width"] = sWidth;
leftCon["height"] =  sHeight;
leftCon["param"] = {"camid":"user1.1"};
leftCon["keepAspectRatio"] = 1;
mixerContents.push(leftCon);

rightCon["type"] = 0; //0： 录制类型为视频
rightCon["left"] = sWidth - 160 - 5;  //上层图像距离最右边 5px
rightCon["top"] = sHeight - 90 -5;   //上层图像距离最下边 5px
rightCon["width"] = 160;
rightCon["height"] = 90;
rightCon["param"] = {"camid":"user2.1"};
rightCon["keepAspectRatio"] = 1;
mixerContents.push(rightCon);

var mutiMixerContents = [{
	"id": mixerID,
	"content": mixerContents
}];

CRVideo_UpdateSvrMixerContent(mutiMixerContents);

CRVideo_StopSvrMixer();