VIVOTEK - Built with Reliability
142 - User's Manual
2. Recording:
2-1. Keep all recordings for maximum * days - determine the life span of recordings in your
system. Usually old recordings will be erased when the storage volumes become full.
When a storage volume is 90% full, the recorded videos taken on the oldest day (from
every camera) will be erased. Deletion of old les will stop when the used space falls
under 85% again.
When recycling takes place, the system buzzer will be triggered, and the recording task
can be halted temporarily until more storage space is regained.
2-2. Pre-alarm buffer time (seconds) - if the alarm-triggered recording is preferred, set up
a pre-alarm buffer for the system to record video before the occurrence of an alarm. The
congurable options are 3, 5, and 10 seconds. A 20MB memory space is reserved for
each camera, and therefore the pre-alarm buffer time can be shorter if the camera video
is recorded using a higher resolution.
2-3. Post-alarm buffer time (seconds) - if the alarm-triggered recording is preferred, set
up a length of time for the system to record video after the occurrence of an alarm. The
congurable options are: 10, 20, 30, 40, 60, and 300 seconds.
2-4. Enable audio recording - Selected by default. Audio input is also recorded along with
the video. However, audio can be muted by default on some cameras. For example, a
speed dome camera requires the connection to an external microphone, and the audio
function is manually turned on through a managment session with the camera.
2-5. Enable Activity Adaptive Streaming - You can enable the Activity Adaptive streaming
feature to reduce the frame rate of a video stream when there is no activities in the eld of
view. The frame rate of the video stream will return to normal, say, 30fps, when activities
occur in the eld of view. This feature can save a considerable amount of bandwidth and
also the le size.
3. Delete:
To remove a camera from your list, left-click to select a camera on the list, and then click the
Delete button.
Note that once a camera is removed, all alarm settings related to the camera, such as DO and
preset location settings, will be erased.
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