Dahua IP Camera: Intermittent Freezing/Pausing/Skipping

[AgentShawn]

I have issue with my Dahua IP cameras with intermittent freezing issues/pausing/skipping during live view.

We use the 52C232XANR models here.

I do surveillance in a casino and the state requires us to have 30fps. I can't budge on that at all. It would take state legislation.

Video Settings for Main Stream:

• Encode Mode: H.264H
• Smart Codec: Off
• Res: 1920*1080(1080P)
• FPS: 30
• Bit Type: CBR
• Bit Custom: 5,000/30 I frame/SVC off

Sub Stream:

• Encode Mode: H.264H
• Res: 704*480(D1)
• 30 FPS
• CBR
• 1024 bit rate
• 60 i frame
• SVC off

Anymore settings needed?

I can't upload an example, due to state restrictions.

Any ideas are appreciated.

 

[wittaj]

How is it being viewed - on a monitor hooked to an NVR, web browser on a computer logging in to the camera, etc?

Usually these issues are network related and it cannot keep up with the non-buffering demands of surveillance video. But you probably have better than consumer grade routers and switches as well.

Or if it is an NVR, you approaching the bandwidth limitation of the NVR.

If it is an NVR, what is the model and how many cameras and MP for each camera?

 

[AgentShawn]

How is it being viewed - on a monitor hooked to an NVR, web browser on a computer logging in to the camera, etc?

Usually these issues are network related and it cannot keep up with the non-buffering demands of surveillance video. But you probably have better than consumer grade routers and switches as well.

Or if it is an NVR, you approaching the bandwidth limitation of the NVR.

If it is an NVR, what is the model and how many cameras and MP for each camera?

They come from the network switches (Extreme) to our VMS servers.

We have 4 servers under our primary. Each of them have quite a few cameras on them (a bit over 400 cameras total on all 4 servers).

I'm wondering if I need to move cameras around to different servers.

Any way to reduce resource consumption without messing with the servers?

I appreciate your reply, by the way.

 

[bigredfish]

^^^^^
THIS

First how are they being viewed and how many at a time, and what model cameras are they. This will establish the baseline

*Note for example I can view 25 cameras (mostly 4MP) using their substream at 1024 CBR 30FPS on my laptop over my home wifi connection using SmpartPSS

 

[bigredfish]

Ooopsss we were posting at the same time. You have a LOT of cameras

 

[AgentShawn]

Ooopsss we were posting at the same time. You have a LOT of cameras

We also have a lot of rules of stuff like retention, fps, and what has to always have a camera on it.

 

[bigredfish]

I'm sure you do.

Way Outta my league, but it would at first seem to be a math issue. Can the Switches, servers, VMS handle the bandwidth and decoding? Then the connections and monitor..

Of course check you arent using ROI or Smart Codec or anything like that.

Assume you are monitoring the substream and can click or take action to enlarge and view Main stream as needed?

 

[CCTVCam]

Are you using Blue Irirs? Because I've seen this is BI yet my network test fine with no reported issues using a network cable tester and the switch and network card and windows all showing gigabit connection. Equally on the PC side, my CPU is usually around 4% and memory 25%. The only reason I can think of on mine might be if the onboard graphics were struggling to display the video stream quickly enough but then again I only have 2 cameras. I'm on an `i5-11400 . Maybe the i5 is the issue for graphics, but then many use much lower performing chips with many more cameras. The alternative to all this is a glitch in BI live view under some settings. My recordings btw are fine, it's only live view which again suggests it's not bandwidth.