Applies to all POE cameras, wifi cameras, except the battery-powered cameras, E1, Reolink Lumus,B400,B800,D400,D800 which comes with NVR kit
Problem phenomenon: there is audio but doesn't have video, no image display
Cause: network error
1. Please make sure the camera firmware is the latest one.
2. Disable the UDP and try with TCP
3. Change another web browser to try, please change to mainstream or substream to check whether both sub and main have the same issue.