Vivotek NR9682-v2 64-Channel NVR (No HDD) - Manual (Page 104)

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104 - User's Manual
Activity Adaptive Stream
■ Activity Adaptive Stream: (Note that this feature may not be available for some older models)
This option will activate the frame rate control according to alarm trigger.
The frame control means that when there is a triggered alarm, the frame rate will raise up to the value
you’ve configured on the Video quality page.
If you enable adaptive recording on a camera, only when an event is triggered on a camera will the
server record the full frame rate streaming data; otherwise, it will only request the I frame data during
normal monitoring, thus effectively saves bandwidth and storage space.
The alarm trigger includes: motion detection and DI detection. Please refer to Alarm Settings on page
142.
On individual cameras, you can configure the following:
■ Pre-event recording and post-event recording
The Network Camera has a buffer that temporarily holds data for a period of time. Therefore, when an
event occurs, the camera can restrieve image frames taken several seconds ago. Enter a number to
define the duration of recording before and after a trigger is activated.
■ Priority: Select the relative importance of this recording (High, Normal, or Low). Recording with a
higher priority setting will be executed first.
■ Source: Select a video stream as the recording source.
Time
Bandwidth
Bandwidth
Activity Adaptive Streaming
for Dynamic Frame Rate Control
I frame ---> Full frame rate ---> I frame
Continuous recording
NOTE:
* To enable adaptive recording, please make sure you have configured the trigger sources such
as Motion Detection, DI input, or Manual trigger.
* When there is no alarm trigger:
- JPEG mode: record 1 frame per second.
- H.264 mode: record the I frame only.
* When the I frame period is > 1 second on the Video settings page, firmware will force decrease
the I frame period to 1 second when the Activity Adaptive Recording feature is enabled.