August 2, 2015
I am using six Dahua 4Mp cameras(DH-IPC-HDW4421C) with Dahua NVR4208. These cameras can generate up to 32Mbps bitrate but NVR4208 accept only up to 10Mbps.
This new 4K NVR's specification says that it can accept up to 20Mbps bit rate. Does anybody know if it can accept 20Mbps bitrate from 6 cameras (i.e. 6*20=120Mbps)?
Based on that camera specs it can do from 32K-10mbps for the bit rate. Also can do 4MP (1-20fps) and 3MP (1-30fps). The NVRs incoming bandwidth (combined sub and main stream) is 256mbps. It should be ok but I have to say this, your network will be running slow specially if your main goal is to access the unit remotely or from the web interface. I will recommend that you match the bit rate and fps on both motion and regular under encode type and reduce the fps on the sub stream to something lower so you can have fluent video preview over the network while viewing it from a phone or PC.
August 2, 2015
My goal is to record main stream in maximum possible resolution and quality.
Here are the specs of my cameras (use Chrome to translate from chinese): http://www.dahuatech.com/produ.....-2484.html
Bit rate of these cameras is: H.264 bit rate is adjustable, 4kbps ~ 32Mbps
So I'd like to find NVR wich will be able to record from 6 cameras with 4MP resolution with 32Mbps bitrate.
The question is - if NVR-ELE8M-4K will be able to accept 20Mbps bitrate from each camera on main stream?
The bit rate comes from the camera and not from the NVR. The camera is capable of only 10Mbps that is way you don't see much higher bit Rate. H.264 is the type of compression instead of Bit Rate. Bit rate is the amount of bandwidth the camera will be using. Also resolution and quality of the camera is going to be based of the resolution of the camera. The NVR-ELE8M-4K will only accept that bit rate if the camera is capable of such of bit rate speed. if you login to the camera itself I would assume that the max bit rate is 10Mbps