Surveillance clipsSurveillance clips are generated as a result of detected motion, alarm, or motion and alarm, depending on how surveillance for each camera is set up.
Surveillance clips have the ability to be much longer in length, and larger in size, than camera capture clips for alarms: surveillance clip settings (such as resolution and frame rate) are independent of the camera capture settings for alarms.
- Inactivity (no motion) of 10 seconds or more will cause a new clip to be created the next time motion is detected.
- Inactivity of less than 10 seconds, will add new frames to the current surveillance clip.
The settings that control the generation of surveillance clips are located in the "Surveillance Settings" display accessed by the Surveillance Settings options in the Device menu, right-click menu in the Device Groups view, or right-click menu in the Thumbnails view.
The settings that control the generation of alarm clips are controlled by the Alarm Capture Data option in the "Capture Settings" display, a display accessed by Camera Settings, a NetBotz Appliance Configuration option in the Device menu and the Device Groups view right-click menu, or by NetBotz Appliance Camera Settings, a right-click menu option in the Thumbnails view.
Surveillance clips are stored on the Data Center Expert server and can be tagged with metadata that allows users to search for specific clips. The location where the server stores clips is defined using Storage Settings, a ServerAdministration Settings option in the System menu.
The size of a surveillance clip is based on the resolution and frame rate of the camera that generated it. These settings are controlled by a camera's "Surveillance Settings" display settings.
You may export clips in AVI, Signed AVI, or MPEG-1 formats. You can also export the currently viewed image as a JPG file. If audio data for a clip exists, it must be exported to a separate file.
NetBotz devices provide the capability to attach a digital signature to the generated clip. This signature is used by the verification utility to determine if any tampering with the clip occurred. If a clip has a digital signature attached to it, the Is Signed column in the clip listing pane of the "Recorded Camera Clips" display reports Yes, and the "Clip Viewer" display will show the digital signature icon () in color.
Data Center Expert ships with a Windows batch file and a Linux script located at the root directory of the Data Center Expert application that can authenticate the existence of a clip's digital signature. Both are run using the same syntax structure:
Windows: avivrfy.bat avi1 avi2 avi3
Linux: avi-verify avi1 avi2 avi3
This syntax allows you to check multiple AVI files by including each file's name in the command line, with a space separating each name.
When the verification utility is run, it returns a message for each file that states whether the digital signature is valid.
Audio supportAudio can be captured from camera devices equipped with audio sensors.
Audio data is stored in the OGG Vorbis codec file format, with an.ogg file extension. You need an audio player that supports this file format in order to play back the exported file.
Note: If your media player cannot play the.ogg file format, you may need to download an additional codec to support the audio file format. Consult your media player help or documentation for details on installing additional codecs.