User Manual

GOP(Group of Pictures) Size - Set up the number of frames (P-frame) which contain only changed information based on basic

frame (I-frame). Regarding videos with lots of movement, if you set GOP size bigger, only the number of P-frames is bigger.

As a result, video resolution will be low but ‘File size’ and ‘Bit-rate can be decreased.

GOP(Group of Pictures) Size is..

I-frame and P-frame can be created for MPEG4 and H.264 video compression. I-frame(=key-frame) means the whole image

dataforonespeciﬁcsceneofvideo.P-frameisimagedatawhichhasbeenchangedinformationcomparedtoI-frameGOPis

made up of one I-frame and corresponding several P-frames. To improve video quality, set the number of P-frames smaller and

to decrease image size, set the number of P-frames bigger.

Proﬁle -TheproﬁledeﬁnesthesubsetofbitstreamfeaturesinanH.264stream,includingcolorreproductionandadditional

video compression.

Smart Bitrate Control

Setup - Video & Audio Setup

Video Configuration

Main -Anintermediateproﬁlewithamediumcompressionratio.ThemainproﬁlesupportsI-frames,P-frames,andB-frames.

High -Acomplexproﬁlewithahighcompressionratio.ThehighproﬁlesupportsI-frames,P-frames,andB-frames.

Baseline - A simple profile with a low compression ratio. The baseline profile supports I-frames and P-frames.

Oﬀ - You can not use the Smart Bitrate Control function.

CVBR (Framerate priority) - This Mode is for cameras which do not want absolute any frame drop, but still want to get lower

bitrate. It has limitation when the Target bitrate is set to be very low, but actual motion is big or scene is very noisy.

CVBR (Quality priority) - When the Target bitrate is set to very low, and motion is big, then LBR will try to drop frames,

andmaketheﬁnalfpstobelower,sothatitcansaveitsandmaketheoutputframestohavebetterquality.

CBR - This Mode is a CBR alike mode which is close to traditional security IPCAM, and it's not designed for LBR,

It's provided as an option in LBR library just to help comparison.