一种集成轻量的演讲影音软件的设计与实现  

The Design and Implementation for An Integrated and Light Weight Presenter's Video and Screen Capture Software

作　　者：程福兴[1] 罗铁坚[1] 

机构地区：[1]中国科学院研究生院信息科学与工程学院,北京100049

出　　处：《科研信息化技术与应用》2011年第4期52-60,共9页E-science Technology & Application

基　　金：中国科学院"十一五"信息化建设专项项目。项目编号:INFO-115-F01

摘　　要：演讲影音软件是一种实时捕捉计算机屏幕画面、计算机麦克风音频以及外接摄像设备信号,并将捕捉到的信号输出为音/视频文件的情景资源录制工具。现有这类工具在应用于教学、演讲、讨论会等场合时存在操作困难、制作过程复杂、CPU消耗高、文件占用存储大的问题。本文介绍的演讲影音是一种轻便、灵活、易用的一体化录制软件。采用这款软件制作多媒体资源只需要一台计算机,在常见计算机上工作时CPU占用率不足20%,远低于同类软件的平均水平;工作流程简洁、更节省时间,一次性完成捕捉、编码、存档;输出文件尺寸时间比约为1.2-1.5M/分钟,远低于同类知名软件Camtasia的3M/分钟。Typical screen capture software is of recording full screen information. Those tools are often used for delivering lecture content to the users on Internet. Most of this software is of capturing and encoding capability, but they still suffer from multi-stage process cost, high CPU consumption and more storage occupation. This paper introduces a new presenter＇s video and screen capture software which is light- weighted, and with high usability. By comparing with the Camtasia, our performance test shows that the CPU consumption is less than 20% with counterpart, and the final encoded file only takes up 1.2-1.5M byte per minute.

关 键 词：教育信息化 屏幕录制 流媒体 情景资源 

分 类 号：TP317[自动化与计算机技术—计算机软件与理论]