Network Video Recorder

we are video survilliance system and we want to introduce a Network Video Recorder for our ONVIF IP Cameras. this is the main features of the system that MUST be available. if you already build a software such as this before, please do a comparsion between your software and our features required. System must contain a program capable of simultaneous operation without any adverse effect on any of the functions. Recording Playback Storage Copying Remote Access System should provide the following features for recorded video Camera Number Camera Location Date Time Of Recording Forced Masking [password protected] Alarm management The System Must Contain search feature of Material Recorded by Number or Name of Camera Location Time & Date The System Should have the ability of long term storing on external storage deives as well as copying on different external media The System should also allow for backup of specific data on any drivers like CD/DVD/Blu Ray Recorders. Log of any Exporting Video or backup should be maintained by the system which can be audited at a later date. The System must have a hot standby system with automatic change over in case of any fatal failure in the active system The System Must Support NTP (Network Time Protocol) for Time Stamp The System Should Accept Joystick Control Unit The System should ensure that the image and video being produced is tamperproof and cannot be altered. The Recording Shall have an Audit Trail Feature