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e. Configure Recording Settings:
Recording Stream: By default, the stream source of the recording stream is stream 1, if you want to
change it later on, please refer to the previous page to update the camera settings.
Pre-event time: Enter a number to decide how much time to record before an event is triggered.
Post-event time: Enter a number to decide the duration of recording after an event is triggered.
For example: If both the Pre-event time and Postevent time are set to 10 seconds, a total of 20
seconds of video will be recorded if an event is triggered. This function is supported by the buffer area
of VAST server (time shift cache stream).
Activity Adaptive Stream (active if possible): Check
this item to enable activity adaptive stream recording
and time shift recording. For cameras combined
with time-shift cache stream and multiple streams
features, user can make use of activity adaptive
streaming for dynamic frame control.
If you check Activate Activity Adaptive Stream and
enable time-shift cache stream on the camera, the
VAST server will record full-frame-rate video only
when an event is triggered on the camera; otherwise,
it will only request the I frame data during normal
monitoring, thus effectively save lots of bandwidths
and storage.
Minimum pre-event time: Due to the limited cache memory on each network camera, the pre-event
time of time shift cache stream on camera may be very short. Then you can choose to set pre-
event recording on the VAST server. For example: To set up a minimum of 5 seconds. If the cache
memory of the selected Network Camera can only support up to 3 seconds, the VAST Server will
switch to enable pre-event recording for 5 seconds by itself, rather than requesting the time shift
cache stream from the network camera.
Please note that if you want to enable activity adaptive stream, we suggest you right-click the camera on the
heirarchical management tree > Camera Settings to open a managment session. Move to Configuraion > Media
> Audio and Video to activate "Time Shift Cache Stream" on the camera and select a stream source. This will
help record complete pre-event recording.
22 - User's Manual
e
Pre-event time
pre-
10 sec.
Trigger Activation
Bandwidth
I frame ---> Full frame rate ---> I frame
Bandwidth
Activity Adaptive Streaming
for Dynamic Frame Rate Control
Continuous recording
Post-event time
post-
10 sec.
Time
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