| With the networking of the video surveillance industry becoming the mainstream,the birth of wireless 4G networks has made remote video surveillance a reality.In order to meet the remote video surveillance needs of some remote areas,an NVR(Network Video Recorder)that accesses 4G networks and meets the needs of the remote market in the field will be indispensable.This thesis designs a remote wireless video surveillance NVR based on embedded Linux,and successfully achieves the basic functions of remote wireless video surveillance NVR.This thesis studies NVR software,first introduces streaming media technology,analyzes RTP/RTCP/RTSP transmission protocol and the format of H264 encoded data,and uses ONVIF protocol to complete communication between NVR and IPC.Then the requirements and overall design of the whole remote video surveillance system are given.The software design structure of NVR and its platform construction process are proposed.The NVR software is divided into two parts: ONVIF client and RTSP server.In the design of the ONVIF client,the ONVIF protocol framework code Compiled by gSOAP is encapsulated.the ONVIF client software is designed to realize interworking with IPC,completing video stream acquisition,parameter configuration,PTZ control,and cover alarms,and it can communicate with remote clients over 4G networks.In the RTSP server part,the RTSP server software that can perform RTSP service for multiple clients is proposed.The whole RTSP server software process and RTSP request processing are designed in detail,and the RTSP service and video stream pushing are successfully implemented.Finally,the two parts are combined to successfully realize the server of remote wireless video surveillance NVR for remote client and some basic functions of video surveillance. |
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