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Example ofanEvent
2.TheactionsforStartby,Onstart,andOnstopare:
a)Startby:Contact3closed->InputContact (3,true)

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b)Onstart:RoutevideoIn3toVideoout2->CrossSwitch (3,2,0)
c) Onstop:Clearvideooutput2->ClearVideoOutput (2)
3.AfterthesetuphasbeensenttotheGeViServer, theeventcanbetestedwiththe
GeViAPITestClient
4.Ifyouleftclickinputcontact3theeventisstarted.Youwillseethatvideoinputstream
3isroutedtovideooutput2.After5secondstheoutputisclearedagain.Youcanalso
seetheeventbeingstartedinthecommunication log.
5.Theeventcanberetriggered. Ifyouleftclickinput3againwhiletheeventisrunning,
the5secondautostoptimestartsoveragain.
6.YoucanalsostarttheeventbysendingaStartEvent message(StartEvent (ID,
"MessageName") ).

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Alarms(optional)
Duetothelargeamountofvideocamerasconnected tomodernvideosurveillance systems,
operatorscannotobserveallthestreamsatthesametime.Moreover, onlycertainincidents
areofinterestorneedaction.Therefore, itishelpfulthatapreselection ofthevideomaterial
showntotheuseriscarriedoutbythesystem.Oftenspecialactionshavetobetakenifapar-
ticularsituationishappening. Asanexampleassumethataparkinglotwithabarrieratthe
entranceisbeingmonitored. Theoperatorissupposed toopenthebarrieraftermakingsure
thatawaitingvehicleisallowedtoenter.Normally, theoperatorwouldhavetowatchthe
streamofthecamerapermanently andactonit.IncaseslikethisGeutebrück systemscan
assistbyprovidingalarms.Alarmsareverysimilartoevents,butoffermoreversatileoptions
forcustomizing anddefiningrequireduserinteraction.
AlarmOptions
GeViSetoffersseveraloptionsforalarms.
Option Description
Name Alarmname–canbeusedinactions
Description Fieldforthedescription ofanalarm
AlarmID Alarmidentifier --canbeusedinactions
Active Alarmscanonlybetriggered ifmarked Active
Priority Alarmscanhaveapriority from1(high)to10(low).Ahigherpriority
alarmwilldisplace alowerpriority oneifconfigured tobeshownon
thesamemonitor group
Monitor Group Several monitors thatareaddressed asagroupforeasieradmin-
istration
Cameras Listofcameras thatarerelevant forthealarm.Theirpictures are
shownonthemonitor groupincaseanalarmoccurs
Retriggerable Ifchecked, thealarmcanberetriggered byitsinitialactivator.
Popup(Retrigger)

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Option Description
Undoacknowledge
(Retrigger)Ifset,thealarmhasalready beenacknowledged andthealarmis
retriggered, thestatewillberesettonotacknowledged.
Userspecific (Retrigger) Ifchecked, acustom listofactions canbeaddedwhichwillbe
executed onaretrigger eventofthealarm
StartbyAction Listofactions. Anyoftheactions willstartthealarm(logical OR)
OnstartAction Listofactions. Alloftheactions willbesentonstart(logical AND)
Acknowledge byAction Listofactions. Anyoftheactions willacknowledge thealarm(logical
OR)
Onacknowledge Action Listofactions. Alloftheactions willbesentonacknowledge (logical
AND)
QuitbyAction Listofactions. Anyoftheactions willquitthealarm(logical OR)
OnquitAction Listofactions. Alloftheactions willbesentonquit(logical AND)
Configuring anAlarm
Configure analarmfortheparkinglotscenarioasdescribed above.Assumethatthedetec-
tionofavehicleisdonebyasensorondigitalinput1(vehicleisdetectedonclose).After
checkingifthevehiclemayentertheoperatormustopenthebarrier.Todosoheacknowl-
edgesthealarmbypushingabuttonconnected todigitalinput2.Asthebarrieriscontrolled
bydigitaloutput1theOnacknowledge actionmustopenthiscontact.Afterthevehiclehas
passed,theoperatormustquitthealarmbypushingabuttonconnected todigitalinput3.On
quitthebarriermustbeclosedbyclosingdigitaloutput1.Theparkinglotissurveilledbytwo
camerasoninputs4and7.Duringthealarm,thesemustberoutedtooutputs1and2.
1.AlarmsaredisplayedinMonitorGroups.FirstdefineoneInGeViSet.
a)Server->Monitorgroups->Add
b)Setthegroup’sNameandDescription toMonitorGroup1
c)Addvideooutputs1and2tothegroup

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d) Leavetherestofthesettingsastheyare
2.AddanewalarminGeViSet: Server->Alarms->Add
a)IntheGeneraltab,setNameandDescription toParkingLot
b)PresstheMonitorgroupbuttonandaddMonitorGroup1
c)AddVideoinput4andVideoinput7toCameras

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AlarmSettings 1

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d)IntheActionstab,settheStartbyactiontoInputContact ,theGlobalContactID to
1andChangedTo totrue.AddtheCaptionvehicledetected
e)SettheAcknowledge byactiontoInputContact ,theGlobalContactID to2and
ChangedTo totrue.AddtheCaptionbuttonacknowledged pressed
f) SettheOnacknowledge actiontoOpenContact ,andtheGlobalContactID to1.
AddtheCaptionopeningbarrier
g)SettheQuitbyactiontoInputContact ,theGlobalContactID to3andChangedTo
totrue.AddtheCaptionbuttonquitpressed
h)SettheOnquitactiontoCloseContact ,andtheGlobalContactID to1.Addthe
Captionclosingbarrier

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AlarmSettings 2

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3.Sendthesetuptotheserver
4.TestthenewalarminGeViAPITestClient
a)Clearvideooutputs1and2byright-clickingonthem.
b)Simulatethearrivalofthevehiclebyleft-clickinginput1.
c)Checkifthealarmistriggeredbyverifyingthatstreams4and7aredisplayedon
monitors1and2.Notethattheoutputs’colorchangedtoredwhichindicatesan
alarmfeed.YoushouldalsofindtheAlarmStarted ()actionintheCommunication
log
d)Acknowledge thealarmandopenthebarrierbyleft-clickinginputcontact2.Make
surethatthisleadstotheopeningofoutput1andanAlarmAcked ()actionappearing
inthelog.
e)Quitthealarmbyleft-clickinginputcontact3.Thevideooutputs’colorshould
changetogreenasthealarmhasfinished.Thebarrier(output1)shouldhaveclosed.

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Switching Video
Thoughmonitorgroupsdatebacktoanaloguevideorecording, theideabehindthemcomesin
handywhencomplexsituations aretobepresented tooperators. InmodernCCTVsystems
mostofthesourcesaredigitalonesandtheviewersrunassoftwareondedicated consoles.
Nevertheless theconceptofmonitorgroupscanstillbereproduced withGeutebrück’s sys-
tems.Thestandardviewer--GscView--canberemotecontrolled toshowpredefined scene
setupsinawaysimilartomonitorgroups.
InthischapteryouwilllearnhowtoswitchbetweentwouserdefinedGscViewscenesbytrig-
geringaGeViSoftalarm.Youwillhaveanormal4-by-4scenedisplaying 16channelsoflive
footagefromaGeViScope. OntriggeringanalarminGeViSoft, GscViewwillbeswitchedtoa
2-by-2scenedisplaying predetermined videochannels.
Scenario
Assumethefollowingsituation,whichiscloselyrelatedtoConfiguring anAlarminchapter
Alarms:
Configure analarmfortheparkinglotscenario.Assumethatthedetectionofavehicleisdone
byasensorondigitalinput1(vehicleisdetectedonclose).Aftercheckingifthevehiclemay
enter,theoperatormustopenthebarrier.Thishappensonacknowledging thealarmbypush-
ingabuttonconnected todigitalinput2.Asthebarrieriscontrolled bydigitaloutput1,theOn
acknowledge actionmustopenthiscontact.Afterthevehiclehaspassed,theoperatormust
quitthealarmbypushingabuttonconnected todigitalinput3.Onquitthebarrierhavetobe
closedbyclosingdigitaloutput1.Theparkinglotissurveilledbytwocamerasoninputs4and
7.Duringthealarm,thesemustberoutedtooutputs1and2ofa2-by-2sceneMyScenein
GscView. Beforeandafterthealarm,all16GeViScope channelsshouldbedisplayedina4-
by-4sceneMyStartScene inGscView.