int main(int argc, char** argv)
{
TaskScheduler* scheduler = BasicTaskScheduler::createNew();//初始化scheduler
UsageEnvironment* env = BasicUsageEnvironment::createNew(*scheduler);//初始化env
//创建一个server实例(优先使用rtsp的554端口,备选8554),并设置客户端请求到达时的回调函数
RTSPServer* rtspServer;
portNumBits rtspServerPortNum = 554;
rtspServer = DynamicRTSPServer::createNew(*env