Dahua NVR and Honeywell cameras with pauses in live stream

[alfred998]

I have a Dahua NVR4208-8P-4KS2 and 4 Honewell H2W2PER3 cameras plugged on its PoE ports. The NVR connects to a 100Mbps switch where I have two computers that show two cameras each on two FHD monitors. Video is continuous, no motion detection. I have tried all possible settings, but my favorite would be H.265, 1080p, VBR, 20FPS, 2000Kbps upper limit. For some reason I am having lags and pauses of a few seconds randomly on all four cameras, (3-10sec every 10 minutes or so). Pauses occur on the NVR itself also when connected to a monitor.
Can you suggest a way to find out what is overloading in the NVR. The network graphic on the NVR shows below 10Mbps load.
Nothing I tried seems to affect the pauses.

 

[jmcu]

Have to tried the H264 to see if the frame skipping goes away ? Troubleshoot 1 cam and see if it still happens and then add 1 each time to see when it starts.

 

[wittaj]

And make sure smart codecs are off on the cameras.

 

[alfred998]

Yes I tried 264 with as low as 15fps, 1000kbps. I didnt try Smart codec because I read somewhere it was problematic.
I will try adding one camera at a time, but it would be really interesting to read system loads on the NVR and learn what is overloading, CPU, network, whatever.

 

[jmcu]

It was still skipping @15 /1k ?
Have you also tried the monitor directly to the NVR and still have the issue?

Someplace on the nvr you should be able to see the load for each camera.. I am not if front of it right now to check ..

I never had a good experience with the 4xxx NVR's. I know they should be able to handle load but they have always been problematic for me.

I won't buy anything below the 5xxx.

 

[alfred998]

Yes I had lags directly at the NVR when watching with a monitor even @15/1000Kbps. Camera loads were between 250-750Kbps. 2000Kbps maximum when set at H.265, 1080p, VBR, 20FPS, 2000Kbps. I tried powering the cameras with a PSU and connect them to the NVR switch, just to exclude a PoE management, there were still lags. Only solution was to connect the cameras to an external PoE switch and connect the NVR through the gigabit port there. I suspect the realtek chip (RTL8309M) cant handle the live stream of more than one camera. So I am letting the NVR record the video and use something external for the live feed.