Improve CPU Usage

[its]

So i've started from scratch on configuring BI 5 with new set of 6 x Dahua Cameras

Previous HikVision x 6 had CPU usage around 5-10% with RAM around 1GB on a NUC . All were 2MP cameras

Currently recording 6 x Dahua Cameras: CPU usage around 40% and RAM is around 2.6GB

Just trying to see if I can improve this or this is the best I can get?

The main settings I can see are :

Hardware accelerated decode: Intel

Each Camera has the following recording

Image Size: 2688 x 1520
Max Rate: 400000 [25.00 fps]
Recording: Continuous
Video Format: BI DVR (Use FLAC audio compression ticket)
Video Compression: Direct-to-disc

Any other setting I should give here?

Are the above good and stick with it or some change to improve things? Just want to get a feel of my setting and recommendations

 

[DsineR]

Are you using sub streams? Big resource saver, implemented in recent BI updates.
Also, 25 fps is a little high for typical surveillance cams. Most of my cams are at 15fps, with a few mission critical cams set higher.

 

[its]

Are you using sub streams? Big resource saver, implemented in recent BI updates.

Not sure what that is / what it means how do i check / uncheck it? I saw that setting in the camera UI itself but didn't pay much attention to it..

Also, 25 fps is a little high for typical surveillance cams. Most of my cams are at 15fps, with a few mission critical cams set higher.

So should I drop it to 15fps?

 

[DsineR]

Check out the substream guide, and there are many posts regarding setup. This is a huge savings in system resources.
Yes, recommend 15fps for your cams. I do have a higher frame rate for some cams (LPR, Front Door, Front Yard), where motion & ID are crucial.

 

[its]

Check out the substream guide, and there are many posts regarding setup. This is a huge savings in system resources.

Thanks.. having a read.. Followed substream guide and CPU Optimization guide I have done the following

1) Enabled substream for 6 cameras and done the following setting on each camera



2) Reduced "Limit live preview rate" from 30 to 6

Now my CPU is around 10% and RAM is 2GB approx .. Nice

Is the above ok and any other recommendation? I believe these settings won't impact my full main stream recording and quality