别人写的gb28181抓取视频流，然后转换成h.264的视频流，sip协议部分是osip和exosip，做这些主流的还是c++，希望哪个大神能更新开源，造福中华(Gb28181, written by others, captures the video stream and converts it into H.264 video stream. The SIP protocol is oSIP and exosip. To do this, the mainstream is c++. Wh