IPVMU Certified | 06/09/16 03:47pm
It's normal. You don't specify the resolutions being used but this is likely the limitation of the video output. Most are limited to 1080p output. Just for a basis if you have 1080p or higher streams and split them by four the display output only has so many pixels to work with and has to reduce the stream resolution to fit the output display. When you go to single channel view that one stream can take advantage of the full amount of pixels available by the display.
Nelly Security | 06/09/16 03:55pm
Actually I think its a design of the recorder to keep the decoding processing down. When you view multi-screen, you are viewing the cameras substream. Whenever you view full screen, you are viewing the cameras mainstream.
You may want to check your substreams resolution, sometimes they default to CIF 352x240, move it up to D1 704x480 to improve that view.
Alot of the standalone recorders do this nowadays. I think their philosophy is that if you are viewing several small sqaures, why waste decoding power on trying to display a 2-3-4mp image on several small squares.
But like I said, if you check your substream resolutions, they could be set to CIF, which will make them look like crap, knock them up to D1 and you will notice a great improvement
Nelly Security | 06/09/16 03:59pm
Whats your firmware version? are you using 7608 NVR?
The guys above are correct, anything quad screen and above will show a sub stream, this is correct for local monitor and iVMS software to help manage decoding performance. You can change these settings and some others things to check -
1)Local Monitor - Menu/Configuration/General - check resolution setting for monitor being used, ensure it is as high as the monitor can handle.
2)Local Monitor - Menu/Record/Parameters/SubStream - check resolution setting for sub stream and bitrate
3)iVMS software - by default the software will automatically select the sub-stream on anything more than quad display, but you can manually correct this and control it to whatever you want. Tools/System Configuration/Image - un-select 'Auto Change Stream Type'. Now if you right click the folder under Main View, you will see the option to select Main/Sub Stream for all cameras, if you right click on the individual camera in the folder this is by single camera. depending on if you are already viewing cameras, you will have to stop and re-select the camera stream for it to take effect.
One final thing make sure the resolutions setting from the camera are also the expected resolution (max for the camera) and bitrate.
And as always ensure your firmware is upto to date on cameras and recorder.
Hope this helps