What should you do if only output HD stream or SD stream

The device resolution and fps are system adaptive, can not support manual adjustment.
If the NVR channel has a black screen or prompts the code stream exceeds the upper limit, this resolution connection is not supported.
If the video recorder supports H.265, the camera selects H.265 encoding format can reduce code stream.

Related link: How to change camera encoding format

Capabilities are adjusted with system versions. Actual usage prevails.