Vantech VP-454CVI User Manual page 20

【Channel】Choose the need to install passage "whole" says setting all channels.
【Encoding Type】720P
【Encoding Mode】Including fixed rate, dynamic rate.
【Image Quality】Client-side image quality, the higher the quality the clearer. Choice scope: minimum, low, general,
high, highest
【Frame Rate】Can click on the button manually input, 1 ~ 25 frames per second (PAL) or 1 ~ 30 frames per second
(NTSC) continuous adjustable.【Audio】Can select close, open according to requirements
【Pre-Alarm Rec】Can select close, open according to requirements
(2)Sub-Stream
【Channel】Choose the need to install passage "whole" says setting all channels.
【Encoding Type】you can select one coding mode in this page.
【Frame Rate】Can click on the button manually input, 1 ~ 25 frames per second (PAL) or 1 ~ 30 frames per second
(NTSC) continuous adjustable. 【 Audio】 Can select close, open according to requirements. But now only support 1-5.
【Image Quality】Client-side image quality, the higher the quality the clearer. Choice scope: minimum, low, general,
high, highest.
(3)Channel Overlay