Delay in the camera Backup

Hi guys!

Good day to you!

I'm going to share a case today about a delay in-camera backup.

Problem Description

Delay in-camera backup 

Network topology:

We have about 300 MPU (VCN 520), it is recorded as an ONVIF and then forward the videos to 10 VMU (VCN3020) to backup the videos for 90 days. 

VCN 3020 doesn't have any camera it works as a storage device for the recordings.

Here is an example of the topology 

This issue here we found one camera is taking backup but it was slow

Problem Analysis

From analysis, It is found the bit rate is 12288 and 4096.

For camera *.*.*.200, we found in logs that the camera gets config parameters from VCN520 with bit rate 12288 and 4096 by checking camera log, it shows SDK and ONVIF protocols query stream and resolution info from the camera and got bit rate 12288(primary stream) and 4096(secondary) as result. 

So it means the camera parameter in the IVS client was also comes from the camera. The earliest camera logs can reach 2021/10/27 03:33:57, indicating that the media stream information of the camera was abnormal. 

Root Cause

It is found the backup delay camera's bit rate is  12288 and 4096, It is too big as the customer has low bandwidth.

Solution

Change the bit rate of the delayed camera to a low bit rate.

Thanks for reading!