基于RTSP的H.264实时流媒体传输方案的研究与实现

发布时间：2018-03-14 09:05

本文选题：流媒体　切入点：Live555　出处：《华南理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着互联网的广泛普及和多媒体技术的迅速发展，基于网络的流媒体传输技术得到了广泛的应用。如视频通话、视频监控、视频点播、网络直播、远程医疗等。但互联网只提供一种“尽力而为”的服务，在视频传输的过程中，由于网络的延时，带宽的不稳定，编码效率的低下，很容易造成数据包的丢失，从而导致视频播放的失真等问题，因此很有必要研究一个有效的实时流媒体传输方案来解决这些问题。本文在对live555进行二次开发的基础上，利用FFMPEG和H.264的高效编解码技术以及RTSP和RTCP/RTP的高效网络传输策略来实现了一个基于RTSP协议的H.264实时流媒体传输方案。本文先是对流媒体的相关技术进行了介绍，对网络传输协议进行了深入的研究，选择了RTSP、RTP、RTCP协议作为网络传输和控制协议，H.264和AAC作为主要的视频、音频编解码标准。其次对流媒体方案进行了比较，选择了live555和FFMPEG作为主要的技术框架。在对live555库、FFMPEG库和Android系统的架构进行了简要地分析的基础上，提出了系统的总体框架，并对服务器和客户端的主要模块进行了简要介绍。接着详细地分析了实时流媒体传输系统的服务器方案，利用RTCP技术解决了实时传输的拥塞控制问题，针对Live555不支持客户端上传、MP4文件下发、实时转发等问题，，对Live555进行了二次开发，增加了上述功能模块，并进行了多进程扩展。然后对流媒体客户端的方案进行了详细介绍，通过在Android平台上移植FFMPEG，结合Anroid API开发了一个既支持RTSP上传又支持RTSP播放的手机客户端，通过采用缓冲队列和时间戳来解决音视频同步和播放等问题。此外还介绍了音视频采集模块，音视频编码模块，客户端MP4文件解析模块、音视频解码模块，音视频播放模块、音视频同步模块的具体实现。最后对系统的硬件和软件环境进行了介绍，并对流媒体服务器和客户端进行了相关测试，对测试结果进行分析表明，系统具有较好的实时性和传输质量。
[Abstract]:With the wide popularity of the Internet and the rapid development of multimedia technology, streaming media transmission technology based on network has been widely used. However, the Internet only provides a "best effort" service. In the process of video transmission, due to the delay of the network, the instability of the bandwidth and the low coding efficiency, it is easy to cause the data packet to be lost. Therefore, it is necessary to study an effective real-time streaming media transmission scheme to solve these problems. Using the efficient coding and decoding technology of FFMPEG and H.264 and the efficient network transmission strategy of RTSP and RTCP/RTP, a real-time streaming media transmission scheme of H.264 based on RTSP protocol is implemented. In this paper, the related technologies of streaming media are introduced, and the network transmission protocol is deeply studied. RTSP / RTP / RTCP protocol is chosen as the network transmission and control protocol, H.264 and AAC as the main video and audio coding and decoding standards. Secondly, the streaming media scheme is compared, and live555 and FFMPEG are selected as the main technical framework. Based on the brief analysis of the framework of live555 library FFMPEG library and Android system, the overall framework of the system is put forward. The main modules of server and client are introduced briefly. Then, the server scheme of real-time streaming media transmission system is analyzed in detail, and the congestion control problem of real-time transmission is solved by using RTCP technology. Aiming at the problem that Live555 does not support uploading MP4 files, real-time forwarding, etc. The secondary development of Live555 is carried out, the above function module is added, and the multi-process extension is carried out. Then, the scheme of streaming media client is introduced in detail. By transplanting FFMPEGon on Android platform and combining with Anroid API, a mobile phone client which supports both RTSP upload and RTSP playback is developed. Buffer queue and timestamp are used to solve the problems of audio and video synchronization and playback. In addition, audio and video acquisition module, audio and video coding module, client MP4 file parsing module, audio and video decoding module, audio and video playing module are also introduced. Audio and video synchronization module implementation. Finally, the hardware and software environment of the system are introduced, and the related tests on streaming media server and client are carried out. The analysis of the test results shows that the system has good real-time and transmission quality.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8

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