AXISM32-LVENetworkCameraSeries
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Variablebitrate(VBR)Variablebitrateallowsthebandwidthconsumptiontovarydependingonthelevel
ofactivityinthescene.Themoreactivity,themorebandwidthyouneed.Withvariablebitrateyouare
guaranteedconstantimagequality,butyouneedtomakesureyouhavestoragemargins.
Maximumbitrate(MBR)Maximumbitrateletsyousetatargetbitratetohandlebitratelimitationsinyour
system.Youmightseeadeclineinimagequalityorframerateastheinstantaneousbitrateiskept
belowthespecifiedtargetbitrate.Youcanchoosetoprioritizeeitherimagequalityorframerate.We
recommendthatyouconfigurethetargetbitratetoahighervaluethantheexpectedbitrate.Thisgives
youamarginincasethereisahighlevelofactivityinthescene.
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Target bitrate
Averagebitrate(ABR)Withaveragebitrate,thebitrateisautomaticallyadjustedoveralongerperiodof
time.Thisissoyoucanmeetthespecifiedtargetandprovidethebestvideoqualitybasedonyour
availablestorage.Bitrateishigherinsceneswithalotofactivity,comparedtostaticscenes.Youare
morelikelytogetbetterimagequalitywheninsceneswithalotofactivityifyouusetheaveragebitrate
option.Youcandefinethetotalstoragerequiredtostorethevideostreamforaspecifiedamountoftime
(retentiontime)whenimagequalityisadjustedtomeetthespecifiedtargetbitrate.Specifytheaverage
bitratesettingsinoneofthefollowingways:
•Tocalculatetheestimatedstorageneed,setthetargetbitrateandtheretentiontime.
•Tocalculatetheaveragebitrate,basedonavailablestorageandrequiredretentiontime,use
thetargetbitratecalculator.
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