Recorder is the high performance network surveillance system for monitoring, video recording and playback from multiple IP cameras. It supports diversified recording features, such as scheduled recording, alarm recording by multiple alarm events, alarm recording schedule, and pre-alarm and post-alarm recordings. An intuitive user interface is provided for the users to view the monitoring screens, connection and recording status, and network bandwidth. Video search by intelligent video analytics (IVA), such as motion detection, foreign object, missing object, out of focus, and camera occlusion is also available for more efficient search of recording data.