Design And Implementation Of Multifunctional Embedded Streaming Media Server

Along with wide applications of embedded technology and fast development of streaming media technology,the embedded streaming media server has far surpassed the based PC stream service and become one of focuses in IT industry by virtue of small volume,convenient portable,good cost,professional function and real-time performance and so forth advantages.On this background,the article devises and completes one multifunctional embedded stream service system.The entire system can achieve broadcasting terrestrial broadcast digital TV program,monitor videos in real time and transfer local storage videos in free flux,in particular,aiming at the practical and sophisticated internet circumstance,it comes up with a kind of scheme that the streaming media transcends internet transport play.In the thesis,multi-functional embedded streaming media service system is composed of hardware and software.Among hardware platform,it includes ARM developing panel,WIFI routers and some external equipment;software consists of embedded streaming media service module,streaming media transit module and clients recipient module three parts and so on.In video internet transportation aspect,aim at the different NAT types' environment and adopt appropriate methods to complete transcending network segment transportation of streaming media video data.The main thesis contents are in the following:(1)This system successfully realizes the cutting out of broadcasting number television videos on the ground and utilizes service transmit;further the clients can set the play by APP.It depends on the special Digital TV tuner and demodulator.(2)In video monitor data transmit aspect,adapting open streaming media server Live555 achieves collection,code and transmit of local camera videos;transplant and utilization of open excellent code plans FFMPEG,mobile client server attains reception of video data and ensures video play within in three seconds.The total system constructs local area environment using WIFI router,and succeeds to watch video in free flux.(3)In face of sophisticated network environment,focus on researching NAT penetration technology,by studying and learning current mainstream NAT penetration technology;particularly,as to the issue of symmetry NAT equipment,it comes up with a valid NAT penetration scheme,resolves the problems between server and clients different network segment data' transmit and correspondence and ensures transparent network of surveillance.The devised multifunctional embedded streaming service system in this thesis,merges NAT penetration algorithm with innovation,and completes transmit real-time videos of Live555 and android mobile fixes reception.These modules strike out unique multifunctional merits and its system has cheap cost,high real-time,transmit in free flux and saving network broadband,based on the different clients demands and using occasion,receive the best benefits with cheap cost,and it is worth promotion in our life.