关于腾讯云直播的一些记录

1、web推流

https://cloud.tencent.com/document/product/267/32720

https://cloud.tencent.com/document/product/267/56505

2、OBS推流

https://cloud.tencent.com/document/product/267/32726

3、web直播

https://webrtc-demo.myqcloud.com/push-sdk/v2/docs/TXLivePusher.html

4、web观看

https://cloud.tencent.com/document/product/881/30818

5、查询流状态

https://cloud.tencent.com/document/product/267/20470

6、混流（屏幕抓取和摄像头同时工作）

https://cloud.tencent.com/document/product/267/72800

7、摄像头直播、屏幕分享、混流demo

function openvideo(url, type) {
            live_type = type;
            if (type == "video") {
                // 采集完摄像头和麦克风之后自动推流
                Promise.all([livePusher.startCamera(), livePusher.startMicrophone()])
                    .then(function () {
                        livePusher.startPush(url);
                        change_cell_status('show');
                    })
                    .catch(function (error) {
                        console.log('打开摄像头或麦克风失败: ' + error.toString());
                    });
            }
            else if (type == "screen") {
                livePusher.startScreenCapture({ Audio: true }).then((streamId) => {
                    screenStreamId = streamId;
                    livePusher.startPush(url);
                    change_cell_status('show');
                }).catch((error) => {
                    console.log('屏幕分享失败：' + error.toString());
                });
            }
            else {
                Promise.all([livePusher.startScreenCapture({ Audio: true }).then((streamId) => {
                    cameraStreamId = streamId;
                    console.log("===", cameraStreamId)
                }), livePusher.startCamera().then((streamId) => {
                    cameraStreamId = streamId;
                    console.log("===", cameraStreamId)
                })])
                    .then(function () {
                        videoEffectManager.setLayout([{
                            streamId: screenStreamId,
                            x: 640,
                            y: 360,
                            width: 1880,
                            height: 800,
                            zOrder: 1
                        }, {
                            streamId: cameraStreamId,
                            x: 1760,
                            y: 735,
                            width: 220,
                            height: 180,
                            zOrder: 2
                        }]);
                        videoEffectManager.setMirror({
                            streamId: cameraStreamId,
                            mirrorType: 1
                        });

                        livePusher.startPush(url);
                        change_cell_status('show');

                    })
                    .catch(function (error) {
                        console.log('打开摄像头或麦克风失败: ' + error.toString());
                    });
            }
        }

8、关于断流

播放端判断：

 player.on('webrtcevent', function (event) {
                 // 从回调参数 event 中获取事件状态码及相关数据
                if (event.data.code == 1006) {
                    console.log('断了')
                }
            });

　　参考网址：https://cloud.tencent.com/document/product/881/30820#.E4.BA.8B.E4.BB.B6

后台判断：

        /// <summary>
        /// 获取直播状态
        /// </summary>
        /// <param name="stream_name"></param>
        /// <returns></returns>
        public static DescribeLiveStreamStateResponse get_live_state_info(string stream_name)
        {
            var app_name = ConfigurationManager.AppSettings["app_name"].ToString();
            var domain_name = ConfigurationManager.AppSettings["domain_name"].ToString();
            var secret_id = ConfigurationManager.AppSettings["secret_id"].ToString();
            var secret_key = ConfigurationManager.AppSettings["secret_key"].ToString();

            // 密钥参数
            string SECRET_ID = secret_id;
            string SECRET_KEY = secret_key;
            DescribeLiveStreamStateResponse resp = new DescribeLiveStreamStateResponse();
            try
            {
                // 实例化一个认证对象，入参需要传入腾讯云账户secretId，secretKey,此处还需注意密钥对的保密
                // 密钥可前往https://console.cloud.tencent.com/cam/capi网站进行获取
                Credential cred = new Credential
                {
                    SecretId = SECRET_ID,
                    SecretKey = SECRET_KEY
                };
                // 实例化一个client选项，可选的，没有特殊需求可以跳过
                ClientProfile clientProfile = new ClientProfile();
                // 实例化一个http选项，可选的，没有特殊需求可以跳过
                HttpProfile httpProfile = new HttpProfile();
                httpProfile.Endpoint = ("live.tencentcloudapi.com");
                clientProfile.HttpProfile = httpProfile;

                // 实例化要请求产品的client对象,clientProfile是可选的
                LiveClient client = new LiveClient(cred, "", clientProfile);
                // 实例化一个请求对象,每个接口都会对应一个request对象
                DescribeLiveStreamStateRequest req = new DescribeLiveStreamStateRequest();
                req.AppName = app_name;
                req.DomainName = domain_name;
                req.StreamName = stream_name;
                // 返回的resp是一个DescribeLiveStreamStateResponse的实例，与请求对象对应
                resp = client.DescribeLiveStreamStateSync(req);
            }
            catch (Exception e)
            {
            }
            return resp;
        }

StreamState的值如下：

//active：活跃，

//inactive：非活跃，
//forbid：禁播。

9、关于直播方式的切换，比如从摄像头直播切换为屏幕分享，是可实现的，只要在切换过程中，不要断流就可以了

 

 如上，从混流切换到屏幕分享，就是先关闭摄像头，然后关闭分享，然后再打开分享，就好了。