手机安防网关及转码服务的研究与设计

发布时间：2019-06-05 06:23

【摘要】：本课题属企业实际应用项目,来源于视频监控安防产业的应用。随着移动终端的飞速发展,简单的集中监控模式已经不能满足人们对任意时间,任意地点的要求。这时候建立一种“手机监控”,“移动安防”的监控模式就成为了安防产业的迫切需求。在这种背景下,研究手机与其他服务器的中转站——手机网关,就具有了非常实际的应用意义。根据项目需要在手机网关上对不同厂家设备转码以降低移动终端软硬件要求的需求定位,项目采用的方法是首先分析背景意义以及视频监控系统中的压缩标准的发展研究现状；接着分别对项目所用到的技术(FFmpeg, H.264,编解码,码率控制等)进行研究分析；之后提出手机网关及转码服务的设计方案；最后做出对应实现并给出测试结果。该课题的结果是：实现了基于windows平台,采用C++语言应用于移动安防系统中的手机网关。该手机网关不但能够转发实时监控音视频,还能够对音视频做对应的编解码,抽帧,降低码率等操作,使输出的音视频流适应网络带宽要求,和对应的移动终端的软硬件限制。该项目的结论是：将不同厂家的音视频进行编解码,从而屏蔽了接入端不同厂家设备的音视频流,并在中间数据阶段进行码流,帧率控制等操作,使得输出数据格式统一并且符合移动终端数据要求,达到最终的集成处理效果。为视频安防监控走向移动化,便捷化,实时化打下了基础。
[Abstract]:This topic belongs to the enterprise practical application project, originates from the video surveillance and security industry application. With the rapid development of mobile terminals, the simple centralized monitoring mode can not meet the requirements of any time and place. At this time, the establishment of a "mobile phone monitoring", "mobile security" monitoring mode has become an urgent need of the security industry. In this context, it is of great practical significance to study the mobile gateway, which is the transit station between mobile phone and other servers. According to the need of the project to transcode the devices of different manufacturers on the mobile phone gateway in order to reduce the requirements of software and hardware of the mobile terminal, the method adopted in the project is to analyze the background significance and the development and research status of the compression standard in the video surveillance system. Then the technologies used in the project (FFmpeg, H.264, coding and decoding, rate control, etc.) are studied and analyzed. Then, the design scheme of mobile phone gateway and transcoding service is put forward. Finally, the corresponding implementation is made and the test results are given. The results of this paper are as follows: based on windows platform, the mobile phone gateway is applied to mobile security system with C language. The mobile phone gateway can not only forward the real-time monitoring audio and video, but also do the corresponding coding and decoding of audio and video, frame drawing, reduce the bit rate and so on, so that the output audio and video stream can meet the network bandwidth requirements and the corresponding software and hardware limitations of the mobile terminal. The conclusion of the project is that the audio and video of different manufacturers are encoded and decoded, so that the audio and video streams of different manufacturers at the access end are shielded, and the code stream, frame rate control and other operations are carried out in the intermediate data stage. The output data format is unified and meets the requirements of mobile terminal data, and the final integration processing effect is achieved. It lays the foundation for the mobile, convenient and real-time video security surveillance.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.6;TN919.81

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