Dahua NVR not displaying 1 of 10 cameras on monitor

gregip

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My 4216P NVR has, for the past few years, displayed all 10 cameras (stream S1) on the monitor. But recently one of the camera windows is blank unless I switch the stream to Main. I've fiddled with lots of settings but I'm at a loss to the reason why. I'm sure it's something sinmple. Any suggestions how I get that one camera to start displaying back on stream S1 again? All other cameras continue to work fine.
 

bigredfish

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^^^^
This

Check first on the camera interface itself, (Not the NVR) that the substream is enabled
 

gregip

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Thanks guys/gals?, you were pretty much correct, although there wasn't any "Codec" field. One of the mainstream fields had changed (not by me or anyone else) so I changed it back to match the other cameras and all is well. Thanks for the help.
 
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