User Manual

VIVOTEK

154 - User's Manual

The alarm trigger includes: motion detection and DI detection. Please refer to Event Settings on page 129.

■ 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

dene 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 rst.

■ Source: Select a video stream as the recording source.

► To enable recording notication please congure Event settings rst . Please refer to page 129.

If you enable adaptive recording on a camera, only when an event is triggered on Camera A 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 bandwidths and storage space.

Time

Bandwidth

Activity Adaptive Streaming

for Dynamic Frame Rate Control

I frame ---> Full frame rate ---> I frame

Continuous recording

► To enable adaptive recording, please make sure

you’ve set up the trigger source such as Motion

Detection, DI Device, 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 >1s on Video settings

page, firmware will force decrease the I frame

period to 1s when adaptive recording is enabled.

Please follow the steps below to set up the recording.

1. Trigger

Select a trigger source.

■ Schedule: The server will start to record les on the local storage or network storage (NAS).

■ Network fail: Since network fail, the server will start to record les on the local storage (SD card).

NOTE: