Axis M1137 - Learning and Specifications; Bitrate control and stream optimization

AXISM11Series
Learnmore
Learnmore
Bitratecontrol
Withbitratecontrol,youcanmanagethebandwidthconsumptionofyourvideostream.
Variablebitrate(VBR)
Withvariablebitrate,thebandwidthconsumptionvariesbasedonthelevelofactivityinthescene.Themoreactivityinthescene,
themorebandwidthyouneed.Youareguaranteedconstantimagequalitybutitrequiresstoragemargins.
Maximumbitrate(MBR)
Withmaximumbitrate,youcansetatargetbitratetohandlebitratelimitationsinyoursystem.Youmayseeadeclineinimage
qualityorframeratewhentheinstantaneousbitrateiskeptbelowthespeciedtargetbitrate.Youcanchoosetoeitherprioritize
imagequalityorframerate.Werecommendthatyoucongurethetargetbitratetoahighervaluethantheexpectedbitrate.This
givesyouamarginforadditionalcomplexitythatneedstobecaptured.
1
Targetbitrate
Averagebitrate(ABR)
Withaveragebitrate,thebitrateisautomaticallyadjustedoveralongertimescale.Thisissoyoucanmeetthespeciedtargetand
providethebestvideoqualitybasedonyouravailablestorage.Bitrateishigherinsceneswithalotofactivity,comparedtostatic
scenes.Youaremorelikelytogetbetterimagequalitywhenneededwhenusingtheaveragebitrateoption.Youcandenethetotal
storagerequiredtostorethevideostreamforaspeciedamountoftime(retentiontime)whenimagequalityisadjustedtomeetthe
speciedtargetbitrate.Specifytheaveragebitratesettingsinoneofthefollowingways:
•Tocalculatetheestimatedstorageneed,setthetargetbitrateandtheretentiontime.
•Tocalculatetheaveragebitrate,basedonavailablestorageandrequiredretentiontime,usethetargetbitratecalculator.
40