具有视频摘要的流媒体系统设计.docVIP

 具有视频摘要的流媒体系统设计 张羽飞，庄伯金** （北京邮电大学信息与通信工程学院） 5 10 15 20 摘要：随着移动互联网和智能终端的快速发展，手机视频点播正逐步成为热门应用。然而， 居高不下的流量费用及带宽的限制成为移动流媒体业务飞速发展的一个障碍。同时，网络上 视频提供商众多，由于内容管理的缺失出现不少名字和内容不符的视频，给用户造成额外的 流量开销。本文针对这一现象，研究和设计具有视频摘要功能的流媒体系统，为用户提供基 本内容预览，以提高用户点播视频的准确性。本文分析了目前流媒体数据的主流封装方式， 选择适用范围较广的 MP4 格式做为流媒体系统的数据封装格式，并设计和实现了一个视频 摘要索引结构。通过在现有 MP4 文件中添加该结构，用户可以快速访问和浏览视频摘要信 息。本文亦重新设计了用户点播视频的流程，通过修改 RTSP 建连过程，服务器能提前的推 送视频摘要信息。另外，本文选择选择开源并且市场占有率较高的 Android 操作系统作为终 端平台，设计和实现了一个流媒体播放器，该播放器可以预览视频摘要信息，验证了本系统 设计的正确性。 关键词：多媒体通信；视频摘要；MP4；Android；RTSP 中图分类号：TP37 STREAMING MEDIA SYSTEM DESIGN WITH A VIDEO SUMMARY ZHANG Yufei, ZHUANG Bojin (School of Information and Communication Engineering,Beijing University of Posts and Telecommunicaitions) 25 Abstract: With the rapid development of mobile Internet and intelligent terminal, video-on-demand is becoming more and more popular. However, the high cost of traffic charge and bandwidth limitations become obstacles. Meanwhile, there are many streaming video providers, but considerable lack of content management. Thus some content does not match the name or literal introduction of the video, which bring in extra network traffic overhead. Focusing 30 35 40 45 on those phenomenons, this paper did a lot of research and designed a new video-on-demand system which has video summary in order to improve the accuracy of the videos demanded.This paper analyzes current mainstream ways of packing media data, and selected the MP4 format as a data encapsulation format because it is widest used in video on demand system, and also designed and implemented a video summary of the index structure.After put the new structure into normal MP4 files, the user can quickly access and browse video information. In order to push video summary to user in advance, this paper also need to modify the RTSP connection establishing process. This paper chooses Android operating system as On-demand terminal for its open source and high market share. A streaming video player is designed on