web端使用PHP实现【云端混流】，暂实现了2人，写篇文章记录下

   
   $sUrlParamT = time() + 60;
        $aUrlParams = [
            'appid'     =>   env('TRTC_APPID'),
            'interface' =>   'Mix_StreamV2',
            't'         =>   $sUrlParamT,
            'sign'      =>   md5(env('TRTC_AUTHENTICA_API_KEY') . $sUrlParamT)
        ];

        //构建请求URL + 参数
        $sRequestUrl = config('mixstream.request_api') . '?' . http_build_query($aUrlParams);

Route::group(['namespace' => 'Api', 'prefix' => 'api'], function () {
    Route::group(['middleware' => 'api'], function () {
        Route::post('webrtc/mix_stream', 'WebrtcController@beginMixStream');//开始混流
        Route::post('webrtc/end_mix_stream', 'WebrtcController@endMixStream');//结束混流
    });
});

    /**
     * 混流操作
     */
    public function beginMixStream(Request $oRequest)
    {
        $this->oWxMixStreamService->beginMixStream($oRequest->input('roomId'), '写死了主播的流ID');
    }

    /**
     * 结束混流
     */
    public function endMixStream(Request $oRequest)
    {
        $this->oWxMixStreamService->endMixStream($oRequest->input('roomId'), '写死了主播的流ID');
    }

<?php

namespace App\Services;

use GuzzleHttp\Client;
use Log;

class WxMixStreamService
{
    public static function beginMixStream($iRoomId, $sStreamId)
    {
        //构建URI鉴权参数
        $sUrlParamT = time() + 60;
        $aUrlParams = [
            'appid'     =>   env('TRTC_APPID'),
            'interface' =>   'Mix_StreamV2',
            't'         =>   $sUrlParamT,
            'sign'      =>   md5(env('TRTC_AUTHENTICA_API_KEY') . $sUrlParamT)
        ];

        //构建请求URL + 参数
        $sRequestUrl = config('mixstream.request_api') . '?' . http_build_query($aUrlParams);
        Log::info($sRequestUrl);

        //请求的参数
        $aRequestParmas = [
            'timestamp' => time(),
            'eventId'   => mt_rand(10000000, 2100000000),
            'interface' => [
                'interfaceName' => 'Mix_StreamV2',
                'para'          => [
                    'interface' => 'mix_streamv2.start_mix_stream_advanced',
                    'app_id' => env('TRTC_APPID'),
                    'mix_stream_template_id' => 30,
                    'mix_stream_session_id' => $iRoomId,
                    'output_stream_id'  => $sStreamId,
                    'input_stream_list'  => [
                        [
                            'input_stream_id' => $sStreamId,
                            'layout_params'   => [
                                'image_layer' => 1,
                            ],
                        ],
                        [
                            'input_stream_id' => '写死了观众的流',
                            'layout_params'   => [
                                'image_layer' => 2,
                            ],
                        ]
                    ]
                ]
            ]
        ];
        //使用guzzleClient扩展，很重要的一点，请求头需要包含Content - Type 为 application/json
        $oRequestClient = new Client();
        $oResponse = $oRequestClient->request('POST', $sRequestUrl, [
            'json' => $aRequestParmas,
        ]);
        Log::info($oResponse->getBody()->getContents());
    }

    //结束混流
    public function endMixStream($iRoomId, $sStreamId)
    {
        //构建URI鉴权参数
        $sUrlParamT = time() + 60;
        $aUrlParams = [
            'appid'     =>   env('TRTC_APPID'),
            'interface' =>   'Mix_StreamV2',
            't'         =>   $sUrlParamT,
            'sign'      =>   md5(env('TRTC_AUTHENTICA_API_KEY') . $sUrlParamT)
        ];

        //构建请求URL + 参数
        $sRequestUrl = config('mixstream.request_api') . '?' . http_build_query($aUrlParams);
        //请求的参数
        $aRequestParmas = [
            'timestamp' => time(),
            'eventId'   => mt_rand(10000000, 2100000000),
            'interface' => [
                'interfaceName' => 'Mix_StreamV2',
                'para'          => [
                    'interface' => 'mix_streamv2.cancel_mix_stream',

                    'app_id' => env('TRTC_APPID'),
                    //申请混流成功后，业务需要记录该值，在取消混流时，将申请混流时的 mix_stream_session_id 填入。
                    'mix_stream_session_id' => (string) $iRoomId,

                    //输出源ID
                    'output_stream_id'  => $sStreamId,
                    ]
                ]
        ];

        Log::info($aRequestParmas);

        $oRequestClient = new Client();
        $oResponse = $oRequestClient->request('POST', $sRequestUrl, [
            'json' => $aRequestParmas,
        ]);
        Log::info($oResponse->getBody()->getContents());
    }
}

   //计算流id，bizid . md5(房间id_用户名_main)
    public function streamId($iRoomId, $sUserName)
    {
        return (string) env('TRTC_BIZID') . '_' . md5($iRoomId . '_' . $sUserName . '_main');
    }
        

//开始混流
 {"code":0,"event_id":"1233110064","message":"Success!","timestamp":1573652147}
//结束混流
 {"code":0,"event_id":"1887094489","message":"","timestamp":1573652735}