
Installation and Operation Manual FSM-IP NVR
4 P/N 06-521 (Rev. 3) Revision Date: June, 2019
3.0BandwidthandStorageCalculations
Foroptimalallocationofbandwidth,FSMIPsupportsseparatenetworksforvideotrafficintheformof2
NetworkInterfaceCards(NICs).Bandwidthofaparticularnetworkisalimitedresourceandoverloading
thenetworkmayresultindramaticdecreaseofdatathroughputandoverallperformance.Thisoverload
wouldresultindroppedvideoframesandasluggishresponsefromthevideomanagementsoftware.
Bandwidthplanningisextremelyimportantsothatyoudonotoverloadyournetworkwithvideodata
traffic.Beforegettingtoactualcalculationsforpeekbandwidthusage,weneedtodiscussthetoolsavailable
tohelpcontrolhowmuchbandwidtheachcamerawillbeusing.Severalfactorscanaffectthebandwidth
neededtotransportthevideo.
Amongthoseare:
1. Numberofchannels
2. Imagequality
3. Framerate
3.1NumberofChannels
Althoughthetotalnumberofchannelsinthesystemistheresultoftheinstallationrequirements,correct
allocationoftheresourceswillbenecessaryforlargerchannelcounts.Concentratingallthetrafficofamulti
serverjoboveronenetworkmayresultinsevereperformancedeterioration.Therefore,careshouldbe
takenwhenmultiNVRinstallationsareconsideredwithtotalchannelcountsexceeding32.Insuchcases,
eachNVRshouldbeconfiguredtosupportindependentsubnetsthathandleitsrespectivecameras.
3.2ImageQuality
Thehighertheimagequality,thelargertheframesize.EachFikeVideoAnalyticsIPcameraprovides
adjustableimagequality.Theimagequalitywillhavealargeimpactontheaveragecameraframe’ssize.This
settingisaccessiblethroughthewebmanageroneachcameraundertheoperatorcontext(seeIPCamera
OperationsManual).Validimagequalityvaluesare25%to100%,where100%willproducethelargestand
highestqualityimages.DuetothenatureofMJPEGcompression,thegainsfromincreasingcompressionwill
bedependentuponimagecontent.Themoredetailedtheimagecontent,thelesscompressibletheimage
becomes.Anexampleframeatanimagequalityof100%compressesto110KB,at80%itcanbecompressed
to40K,andat25%thesameimagewascompressedto12K.Thecamerasdefaultimagequalityis80%.On
averageasingleframeat80%qualitywillbearound60K.Tochangetheimagequality,seetheFikeVideo
AnalyticsIPCameraOperationsManual.
3.3FrameRate
Asmoreframesaretransmitted,morebandwidthwillberequired.TheFSM‐IPNVRwillopenandmaintaina
connectiontoeachcamerasoitcanreceiveframesandstatusinformation.TherateatwhichaFikeVideo
AnalyticsIPcameraisfeedingframesisconfigurableandvariesbasedonactivityintheviewofthecamera.
Theserverconfigurationprovidestworates:foractiveandinactivestate.Theinactivestateiswhenno
motionispresentwithinthecamerasfieldofview.Theactivestateiswhenmotionisvisibleinthefieldof
vieworthecameraisinanalarmstate.Thedefaultstateis5FramesPerSecond(fps)foractiveand0.5fps
forinactivestates.Thisdesignconservesbandwidthbyonlystreamingframestotheserverwhentherehas
beenasignificantchangetotheimage.