Based on the event-triggered video recording in the digital video monitoring system, the method of video pre-recording is designed and used in the realization of the event-triggered video recording, and the pivotal C++ program is provided.

• 以数字视频监控系统中的事件触发录像为背景,说明预录像的设计原理以及在事件触发录像中如何使用所设计的预录像方法实现数字视频监控系统中的事件触发录像功能,并给出了关键的C+程序实现代码。