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February 24, 2018
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Good day,
I have a single 4K capable, 12MP, 5mm lens, ONVIF, network bullet security camera connected to an 8 channel, 4K, 8 - 12MP Ultra High Definition PoE, No Hard Drive NVR
which is connected to a 55" large 4K display. All we need is a clear, clean, crisp live 4K feed on the TV of what the camera sees. Plug it all in, power it on and it works. The problem occurs about 10 - 15 seconds after powering on the NVR. Initially, the picture on the screen is crystal clear but then it goes black, comes back on, goes black again, comes back on and when it does this a couple times and you look, the resolution has clearly stepped down from Ultra High Def to what looks like 720p.
Poking around with the encode settings, particularly when trying to change the H.264 mode, the bitrate and other settings - when saved - they do not stick. Our guess is that even though this NVR can support 8 cameras that even with one, it's being overpowered and as a result is stepping down the output to the large screen.
Any thoughts from anyone?
Weldon
February 24, 2018
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I connected directly to the camera and noticed that it was setup for tri-stream. I understand now that the NVR is usually there to record and so that the recording has the highest possible picture quality, the NVR can step-down the live feed to a second and third stream of lower quality to achieve this. I have changed the setting on the camera to a single stream I think this may be the fix.
February 24, 2018
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As a further update guys, I have been tinkering with the settings on both the camera and the NVR in an attempt to get the best picture quality before the display goes blank and never recovers. Seems like any reasonable setting at the highest resolution 3840 x 2160 falls over. I've dropped framerate and bitrate. 🙁
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