随着中国大学视频公开课的兴起,影视同期声字幕在网络视频教学中占有越来越重要的地位,Time machine(时间机器)软件拥有强大的功能,能够完成实时字幕的要求。本文重点介绍此软件的使用方法,从准备、录入、保存、修改、输出等方面做了具体介绍,使用者能够熟练地掌握应用方法,服务于教学当中。 With the rise of video open class in China University of Film and Television, video subtitle plays a more and more important role in online video teaching at the same time. Time machine software has powerful functions and can fulfill real-time subtitle requirements. This article focuses on the use of this software, from the preparation, entry, preservation, modification, output and so made a specific introduction, the user can master the application method, service teaching.