Axis P1254 User Manual

AXISP1254NetworkCamera
MediaStreams
MediaStreams
TheAxisproductprovidesseveralvideostreamformats.Yourrequirementsandthepropertiesofyournetworkwilldeterminethe
typeyouuse.
TheLiveViewpageintheproductprovidesaccesstoH.264andMotionJPEGvideostreams,andtothelistofavailablestream
proles.Otherapplicationsandclientscanaccessvideostreamsdirectly,withoutgoingviatheLiveViewpage.
HowtoStreamH.264
H.264can,withoutcompromisingimagequality,reducethesizeofadigitalvideolebymorethan80%comparedwiththeMotion
JPEGformatandasmuchas50%morethantheMPEG-4standard.Thismeansthatmuchlessnetworkbandwidthandstoragespace
arerequiredforavideole.Orseenanotherway,muchhighervideoqualitycanbeachievedforagivenbitrate.
Decidingwhichcombinationofprotocolsandmethodstousedependsonyourviewingrequirements,andonthepropertiesof
yournetwork.TheavailableoptionsinAXISMediaControlare:
UnicastRTP
Thisunicastmethod(RTPoverUDP)isused
forliveunicastvideo,especiallywhenitis
importanttohaveanup-to-datevideostream,
evenifsomeframesaredropped.
RTPoverRTSP
Thisunicastmethod(RTPtunneledoverRTSP)
isusefulasitisrelativelysimpletocongure
rewallstoallowRTSPtrafc.
RTPoverRTSPoverHTTP
Thisunicastmethodcanbeusedtotraverse
rewalls.Firewallsarecommonlyconguredto
allowtheHTTPprotocol,thusallowingRTPto
betunneled.
Unicastingisusedforvideo-on-demand
transmissionsothatthereisnovideotrafc
onthenetworkuntilaclientconnectsand
requeststhestream.
Notethatthereareamaximumof10
simultaneousunicastconnections.
MulticastRTP
Thismethod(RTPoverUDP)shouldbeusedforlivemulticastvideo.Thevideostreamisalways
up-to-date,evenifsomeframesaredropped.
Multicastingprovidesthemostefcientusageofbandwidthwhentherearelargenumbersof
clientsviewingsimultaneously.Amulticastcannothowever,passanetworkrouterunlessthe
routerisconguredtoallowthis.ItisnotpossibletomulticastovertheInternet,forexample.
Notealsothatallmulticastviewerscountasoneunicastviewerinthemaximumtotalof10
simultaneousconnections.
AXISMediaControlnegotiateswiththeAxisproducttodeterminethetransportprotocoltouse.Theorderofpriority,listedinthe
AMCControlPanel,canbechangedandtheoptionsdisabled,tosuitspecicrequirements.
Note
H.264islicensedtechnology.TheAxisproductincludesoneH.264viewingclientlicense.Installingadditionalunlicensed
copiesoftheclientisprohibited.Topurchaseadditionallicenses,contactyourAxisreseller.
MJPEG
ThisformatusesstandardJPEGstillimagesforthevideostream.Theseimagesarethendisplayedandupdatedataratesufcient
tocreateastreamthatshowsconstantlyupdatedmotion.
TheMotionJPEGstreamusesconsiderableamountsofbandwidth,butprovidesexcellentimagequalityandaccesstoeveryimage
containedinthestream.TherecommendedmethodofaccessingMotionJPEGlivevideofromtheAxisproductistousetheAXIS
MediaControlinInternetExplorerinWindows.
AXISMediaControl(AMC)
AXISMediaControl(AMC)inInternetExplorerinWindowsistherecommendedmethodofaccessinglivevideofromtheAxisproduct.
13

Axis P1254 Specifications

General

Brand	Axis
Model	P1254
Category	Security Camera
Language	English