how many cameras on NVR DS-7616NI-K2 ?

[da78n]

Sellers promote the Hikvision DS-7616NI-K2 as a 16channels, 8MP, H.265/H.265+/H.264/H.264+/MPEG4 NVR.
Looking through technical specification I can't understand how many iP cameras can I connect on this NVR.
I would like to start with 4 cameras Hikvision DS-2CD2043G0-I (4MP, 2688 ×1520@30fps, H.265+/H.265/H.264+/H.264/MJPEG , 256Kbps~16Mbps ) but I'm not sure if the NVR can record the video on maximum resolution.
In the NVR datasheet is mentioned that Decoding Capability is 2-ch @ 8 MP (25fps) / 4-ch @ 4MP (30fps) / 8-ch @ 1080p(30fps).
Please help me to understand what cameras can be connected on this NVR? Will my 4MP cameras work on this NVR?
Thank you.

 

[alastairstevenson]

I can't understand how many iP cameras can I connect on this NVR.

It's a 16 channel NVR, to which you can connect up to 16 cameras.

but I'm not sure if the NVR can record the video on maximum resolution.

The key performance parameter is the 'Incoming bandwidth' which the specification states as 160Mbps
That means the sum total of the bitrate of the network traffic coming from all the cameras must be less than that value.
The resolution and frame rate chosen does affect the bitrate - but bitrate can be set independently of the resolution. It allows you to trade off image quality and storage size.

In the NVR datasheet is mentioned that Decoding Capability is 2-ch @ 8 MP (25fps) / 4-ch @ 4MP (30fps) / 8-ch @ 1080p(30fps).

That's for playback of already recorded video.

 

[SouthernYankee]

There is no direct answer to the question.
The NVR supports 160 Mbps, that is Mega bits per second.
The bit rate depends on the frame size, frame rate, Iframe value, compression, complexity of the image, the motion in the image, the number of bits in a pixel (normally 24 for color, but can be different).

 

[da78n]

Now i start to understand.
The NVR has 16 channels so can accept 16 cameras but the main condition is those cameras not to exceed 160 Mbps bandwidth. Please correct me if I'm wrong.

In this case, can I connect to NVR 4 cameras of 4MP, 2688 ×1520@30fps, H.265+/H.265/H.264+/H.264/MJPEG , 256Kbps~16Mbps model DS-2CD2043G0-I ?
According to the camera specification, used bandwidth is between 256Kbps and 16Mbps. Did i understand right?
The cameras will use maximum 16Mbps x 4cameras = 64Mbps. Please correct me if I'm wrong.

 

[SouthernYankee]

2688x1520x30x24x4 /(1024*1024) = ‬ 11221 mbps without compression. This is worse case.

Mbps is mega bits per second. A color camera has 24 bits per pixel.
4MP is 4 Mega pixels not mega bits.

You can not calculate the value accurately, there are way too many variables.
I would guess is that it is about 100 Mbps with H.265

There are online calculators that guess at the value.

If this is your desired starting point, I would look at a much better NVR. Or significantly reduce your frame rate to no more than 12-15 FPS which current is the norm for security recording.

Please look at Hikvision darkfighter cameras if you have a low light night requirement. Also bullet cameras collect spiderwebs .

Please read,study, plan before spending money

 

[alastairstevenson]

The NVR has 16 channels so can accept 16 cameras but the main condition is those cameras not to exceed 160 Mbps bandwidth. Please correct me if I'm wrong.

Yes, that's correct.

According to the camera specification, used bandwidth is between 256Kbps and 16Mbps. Did i understand right?
The cameras will use maximum 16Mbps x 4cameras = 64Mbps. Please correct me if I'm wrong.

That's essentially correct, where those figures are the configurable bitrate for a single camera.

However - that older-model discontinued NVR won't be happy running cameras at a bitrate of 16Mbps - you will likely find jumps and breaks in the recording.
You would need to drop the bitrate to to 6 or 7Mbps each at a guess.
And, strictly, it does not support h.265

 

[da78n]

And, strictly, it does not support h.265

After reading your statement i looked again through the datasheet.
I find out the following:
- Decoding format: H.265/H.265+/H.264/H.264+/MPEG4
- HD Input: H.265/H.265+/H.264/H.264+/MPEG4 video formats
- HD Storage: Storage space effectively saved by 50% to 70% with the use of H.264+ decoding format

It seems that some of the most important characteristics are well hidden inside the datasheet.

How i understand, it reads a H.265 stream from the camera but it reencode the video for storage on HDD in H.264 format.

Is this the reason you say "it does not support h.265" ?

 

[alastairstevenson]

After reading your statement i looked again through the datasheet.
I find out the following:
- Decoding format: H.265/H.265+/H.264/H.264+/MPEG4
- HD Input: H.265/H.265+/H.264/H.264+/MPEG4 video formats
- HD Storage: Storage space effectively saved by 50% to 70% with the use of H.264+ decoding format

And I have boobed, somehow, for which please accept my apologies.

My response was for a DS-7616NI-E2 - not the DS-7616NI-K2 which you quoted in your original post.
I'm not sure how I mixed that up, I think I had more than one response on the go at the time.
That NVR does indeed support h.265, which is a big benefit in terms of storage history.

How i understand, it reads a H.265 stream from the camera but it reencode the video for storage on HDD in H.264 format.

I don't believe the NVR re-encodes video for storage on the HDD, I think it stores the video as it receives it from the cameras.
It does however need to decode the retrieved video for playback or Live View, so whatever is displaying it - the native firmware on the VGA/HDMI interface, or via webcomponents in the browser via the web GUI, does need to be able to render it.

 

[da78n]

So, as a conclusion, DS-7616NI-K2 can work with 4 pcs DS-2CD2043G0-I at 4MP resolution ?
Also, the video will be saved in H.265 compression ?

 

[alastairstevenson]

So, as a conclusion, DS-7616NI-K2 can work with 4 pcs DS-2CD2043G0-I at 4MP resolution ?
Also, the video will be saved in H.265 compression ?

Yes, I do believe so.