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I swapped out my DS-7616NI-I2/16P on Monday with the DS-7616NI-M2/16P. I'm a geek for new tech and have to say this has been one of the most boring upgrades I've done. Externally the NVR looks the same, internally the NVR looks the same, the menus look the same. However my first impressions are good...
My home system consists of 9 cameras currently - 3 x DS-2CD2387G2 (8MP G5 ColorVu Turret), 1 x DS-2CD2347G1-LU (4MP ColorVu Turret 1st gen), 1 x DS-2CD2346G2-ISU/SL (4MP G3 AcuSense Turret Live Guard), 2 x DS-2CD5A46G0-IZS (4MP 2.8-12mm 'ultra' bullet), 2 x DS-2CD2386G2 (8MP G3 AcuSense Turret)
In general everything worked quite well on the I series. However I was seeing a few issues more recently. Sometimes the local UI was sluggish and would lock up temporarily while switching from normal to smart playback (multiple buttons would show pressed, calendar would temporarily vanish). The playback of the 8MP models could be temperamental and would sometimes playback slowly at around 1/2 speed as if the machine were struggling to decode for playback.
Although with the 9 cameras I was comfortably within the 160Mbps incoming bandwidth limit for the I series, I wondered whether the newer M series performance would be noticeable. It is. I've maxed out all of my 8MP cameras to 25FPS with max bitrate of 16,384. The 4MP are also at 25FPS with max bitrate of 8192. Both of those settings are over the top for H265 but I wanted to stress it a bit just for giggles.
My home system consists of 9 cameras currently - 3 x DS-2CD2387G2 (8MP G5 ColorVu Turret), 1 x DS-2CD2347G1-LU (4MP ColorVu Turret 1st gen), 1 x DS-2CD2346G2-ISU/SL (4MP G3 AcuSense Turret Live Guard), 2 x DS-2CD5A46G0-IZS (4MP 2.8-12mm 'ultra' bullet), 2 x DS-2CD2386G2 (8MP G3 AcuSense Turret)
In general everything worked quite well on the I series. However I was seeing a few issues more recently. Sometimes the local UI was sluggish and would lock up temporarily while switching from normal to smart playback (multiple buttons would show pressed, calendar would temporarily vanish). The playback of the 8MP models could be temperamental and would sometimes playback slowly at around 1/2 speed as if the machine were struggling to decode for playback.
Although with the 9 cameras I was comfortably within the 160Mbps incoming bandwidth limit for the I series, I wondered whether the newer M series performance would be noticeable. It is. I've maxed out all of my 8MP cameras to 25FPS with max bitrate of 16,384. The 4MP are also at 25FPS with max bitrate of 8192. Both of those settings are over the top for H265 but I wanted to stress it a bit just for giggles.
- The local UI is far more snappy, responding instantly when searching playback etc
- The occasional playback issue on the I series with one 8MP camera is eliminated. I can play all five 8 MP cameras back simultaneously with no lag. This can only be down to the additional performance of the new NVR, as I moved the existing hard disks from the I series and can discount those as a cause for the previous issues.
- A few issues with the web GUI that have been reported in another thread (lag, preview images missing)
- I seem to be getting a loss of HDMI for 1/2 a second every few minutes. This is not so minor. I first thought this was just while I had the menu screen displayed but it's just occurred while on live view. The NVR is connected directly to my Samsung 4K TV at 4K 60Hz exactly as the I series was. It could be my setup, but nothing has changed apart from the NVR.
- On the local GUI while in multiscreen. If you're in live view with fullscreen selected (no menu strips) the pop up toolbar that appears when you hover over each camera view fits correctly. However when you have the top and side menu visible, those pop up toolbars are not resized and are wider than the image, overlapping into the adjacent segment.
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