With more than 50% substitution of analog inputs for IP cameras, FPS of the first stream can be calculated according to this table of camera specifications. For example, when connecting sixteen 8MP cameras, the total FPS of the 1st stream shall not exceed 128.
Line XVR 16 H.265 specifications:
Number of analogue video inputs:
Number of analogue audio inputs:
Supported analogue formats:
CVI, CVBS, HD-TVI, AHD.
IP video input:
up to 16 IP channels with analogue replacement.
up to 16 audio channels
Resolution/capture/display/recording speed of analog cameras:
up to 8 megapixels at 15 fps.
Resolution/capture and recording speeds of the IP cameras: