Axis Q86-E Series User Manual

AXISQ8632-EPTThermalNetworkCamera
Aboutvideosettings
ClickSavetoapplythenewsettings.
AboutH.264
H.264,alsoknownasMPEG-4Part10/AVC,isavideocompressionstandardthatprovideshighqualityvideostreamsatlowbitrates.
AnH.264videostreamconsistsofdifferenttypesofframessuchasI-framesandP-frames.AnI-frameisacompleteimage,whereas
P-framesonlycontainthedifferencesfrompreviousframes.
AboutGOPlength
AGroupofPictures(GOP)containsoneI-framefollowedbyanumberofP-frames.TheGOPlengthisthenumberofframes
betweentwoI-frames.
EqualvaluesforGOPlengthandframerateresultinoneGOPpersecond.AhigherGOPlengthvalueresultsinmoresmall-sized
P-framesandlessbig-sizedI-frameswhilekeepingthesameframerate.Inotherwords,ahighGOP-lengthvaluesavesbandwidth,
butthevideoqualitymaydecrease.AlowGOP-lengthvalueincreasesthevideoqualitybutrequiresmorebandwidth.
AboutH.264proles
TheAxisproductsupportsthefollowingH.264prole(s):
•Main:TheMainproleusesCABACandprovidesabettercompressionwithmaintainedvideoquality.Itrequiresalarger
amountofprocessingpowertodecodethantheBaselineprole.
Aboutbitratecontrol
Bitratecontrolisusefultomakesurethevideostreamingdoesnottakeuptoomuchbandwidth.
Aboutvariablebitrate
Variablebitrate(VBR)adjuststhebitrateaccordingtotheimagecomplexity.Whentheactivityinthesceneincreases,VBRadjusts
thebitrateaccordingtothecomplexity,usingupmorebandwidthforincreasedactivityinthescene,andlessforlowersceneactivity.
Variablebitrateissuitableifthereisasurplusinbandwidth,wheretheincreasedbitratemaynotbeanissue.
Aboutconstantbitrate
Ifbandwidthislimited,werecommendtocontrolthebitratebyselectingConstantbitrate(CBR).CBRallowsyoutosetatarget
bitratethatlimitsthebandwidthconsumption.TheCBRtargetbitrateworksliketheceilingofatent.Itlimitsthebitrate,while
maintainingsomeexibility.Thebitratemaybounceupanddownwithinthesettargetbutwhenitnearsthesettargetvalue,the
limitationkicksin.However,becauseCBRwillalwaysprioritizeacontinuousvideostream,itallowstemporaryovershootsfromthe
targetbitrate.Topartlycompensateforthenegativeeffectonframerateandimagequality,selectwhichvariabletobeprioritized.
Notsettingaprioritymeansthatframerateandimagequalityareequallyaffected.
HowtosetanH.264prole
1.TochangethesettingsforallH.264streamsthatdonotuseastreamprole,gotoVideo>VideoStream>H.264.
2.ToincreaseordecreasethenumberofframesperGOP,settheGOPlength.
3.SelectoneoftheH.264proles.
4.Selectoneofthefollowing:
-Variablebitrate
-Constantbitrate
5.IfyouselectConstantbitrate,selectwhichvariabletoprioritizeinthePrioritydrop-downlist.
6.ClickSave.
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Axis Q86-E Series Specifications

General

Brand	Axis
Model	Q86-E Series
Category	IP Camera
Language	English