SIST EN IEC 62676-2-31:2019

Video surveillance systems for use in security applications - Part 2-31: Live streaming and control based on web services

IEC 62676-2-31:2019 defines procedures for communication between network video clients and video transmitter devices. This new set of specifications makes it possible to build network video systems with devices and receivers from different manufacturers using common and well-defined interfaces.
These interfaces cover functions such as media and imaging configuration, real-time streaming of audio and video, pan, tilt and zoom (PTZ) control as well as analytics.
The management and control interfaces defined in this document are described as web services. Annex F contains XML schema and Web Service Description Language (WSDL) definitions for the introduced network services.
This first edition, together with IEC 60839-11-31 and IEC 62676-2-32, cancels and replaces IEC 62676-2-3:2013. This edition includes the following significant technical changes with respect to IEC 62676-2-3:2013:
a) addition of the Media2 service;
b) additional methods for the imaging service;
c) method duplicates from the device IO service have been removed;
d) both the display and analytics device service are no more included.

Videoüberwachungsanlagen für Sicherungsanwendungen - Teil 2-31: Videoübertragungsprotokolle - IP-Interoperabilität auf Basis von Webservices - Echtzeit-Streaming und Konfiguration

Systèmes de vidéosurveillance destinés à être utilisés dans les applications de sécurité - Partie 2-31: Transmission en continu en direct et contrôle basé sur les services web

l'IEC 62676-2-3:2019 définit les procédures de communication entre les clients vidéo en réseau et les dispositifs de transmission vidéo. Ce nouvel ensemble de spécifications permet de concevoir des systèmes vidéo en réseau avec des dispositifs et des récepteurs de différents fabricants utilisant des interfaces communes et bien définies. Ces interfaces couvrent des fonctions telles que la configuration multimédia et d'imagerie, la transmission en continu en temps réel de contenu audio et vidéo, le contrôle panoramique, inclinaison et zoom (PTZ – Pan, Tilt and Zoom) et l'analyse.
Les interfaces de gestion et de contrôle définies dans le présent document sont décrites sous forme de services Web. L'Annexe F contient les définitions du schéma XML et du langage de description de services web (WSDL – Web Service Description Language) pour les services de réseaux présentés.
Cette première édition, conjointement avec l'IEC 60839-11-31 et l'IEC 62676-2-32, annule et remplace l'IEC 62676-2-3:2013. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'IEC 62676-2-3:2013:
a) ajout du service Media2;
b) méthodes supplémentaires applicables au service d'imagerie;
c) suppression des méthodes de duplication du service ES de dispositive;
d) retrait définitif du service de dispositif d'analyse et du service d'affichage.

Video nadzorni sistemi za varnostne aplikacije - 2-31. del: Prenos v živo in kontrola na podlagi mrežnih servisov

Ta standard določa postopke za komunikacijo med omrežnimi video odjemalci in video oddajnimi napravami. Ta nov nabor specifikacij omogoča izgradnjo omrežnih video sistemov z napravami in sprejemniki različnih proizvajalcev, ki uporabljajo skupne in dobro opredeljene vmesnike. Ti vmesniki zajemajo funkcije, kot so konfiguracija medijev in slik, sprotno pretakanje zvoka in videa, nadzor premikanja, nagiba in povečave (PTZ), pa tudi analitika. Upravljalni in nadzorni vmesniki, opredeljeni v tem dokumentu, so opisani kot spletne storitve. Dodatek F vsebuje shemo XML in definicije jezika za opis storitev (WSDL) za predstavljene omrežne storitve.

General Information

• Status: Published
• Publication Date: 15-Oct-2019
• ICS: 13.320 - Alarm and warning systems
• ICS: 33.160.40 - Video systems
• Technical Committee: EAL - Alarm systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Oct-2019
• Due Date: 15-Dec-2019
• Completion Date: 16-Oct-2019
• Directive: 2012-01-0929 - Odredba o določitvi standardov, ki so obvezni na področju zasebnega varovanja
• Ref Project: EN IEC 62676-2-31:2019 - Video surveillance systems for use in security applications - Part 2-31: Live streaming and control based on web services

Relations

• Revised: SIST EN 62676-2-3:2014 - Video surveillance systems for use in security applications - Part 2-3: Video transmission protocols - IP interoperability implementation based on web services
• Effective Date: 05-Nov-2019

Overview

SIST EN IEC 62676-2-31:2019 specifies web‑service based interfaces for communication between network video clients and video transmitter devices in security-focused video surveillance systems. The standard enables interoperable, multi‑vendor network video solutions by defining well‑specified management and control services for media, imaging, real‑time streaming, PTZ control and analytics. Annex F provides XML schema and WSDL definitions for the defined network services to support standardized implementations.

Key topics and technical requirements

• Web services interfaces: Management and control operations are exposed as web services (WSDL/XML schema provided) to standardize client ↔ device interactions.
• Media service: Media profiles, media configurations, methods such as GetStreamUri and GetSnapshotUri, multicast control and profile management (including the newly added Media2 service in this edition).
• Imaging configuration: Methods and options to query and set imaging parameters; additional imaging methods were introduced in this edition.
• Real‑time streaming: Support and interaction patterns for streaming audio/video; normative references include RTP/RTSP, SDP and related payload formats (H.264, HEVC, MPEG‑4), plus WebSocket and HTTP over TLS for secure transport.
• PTZ control: Standardized commands and interfaces for pan, tilt and zoom operations.
• Device IO and capabilities: Device I/O service for inputs/outputs, video/audio sources and outputs, capability reporting and events (e.g., profile or configuration changes, active connections).
• On‑screen display (OSD) and privacy masks: Methods to create, modify and remove OSD elements and privacy masks.
• Interoperability-focused changes: This edition removes duplicated methods from device IO service and excludes the display and analytics device service; it cancels/replaces IEC 62676‑2‑3:2013 when published alongside IEC 60839‑11‑31 and IEC 62676‑2‑32.

Practical applications

• Building interoperable, multi‑vendor IP video surveillance systems where cameras, encoders and management clients from different vendors must interoperate.
• Implementing VMS (video management system) features such as stream discovery (GetStreamUri), snapshot retrieval, PTZ control, OSD and privacy mask management.
• Designing secure streaming solutions that integrate standard transport protocols (RTP/RTSP, HTTPS/TLS, WebSocket) with standard service interfaces.
• Automating device provisioning and configuration using the provided WSDL/XML schemas for programmatic integration and device lifecycle management.

Who should use this standard

• Camera and encoder manufacturers aiming for interoperability with third‑party clients and VMSs.
• VMS and client software developers implementing standardized control and streaming interfaces.
• Systems integrators and security architects designing scalable, multi‑vendor surveillance deployments.
• Standards bodies and testing labs validating conformance to web‑service based video control interfaces.

Related standards

• IEC 60839‑11‑31 (electronic access control core interoperability protocol based on web services)
• IEC 62676‑2‑32 (companion video surveillance parts)
• RFCs and IETF specs referenced (RTP, RTSP, SDP, WebSocket, HTTP Over TLS) used by implementers for transport and payload compatibility.

Keywords: IEC 62676-2-31:2019, video surveillance standard, web services, network video, live streaming, PTZ control, interoperability, WSDL, XML schema, media profiles.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2019
Video nadzorni sistemi za varnostne aplikacije - 2-31. del: Prenos v živo in
kontrola na podlagi mrežnih servisov
Video surveillance systems for use in security applications - Part 2-31: Live streaming
and control based on web services
Ta slovenski standard je istoveten z: EN IEC 62676-2-31:2019
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
33.160.40 Video sistemi Video systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62676-2-31

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2019
ICS 13.320
English Version
Video surveillance systems for use in security applications - Part
2-31: Live streaming and control based on web services
(IEC 62676-2-31:2019)
Systèmes de vidéosurveillance destinés à être utilisés dans Videoüberwachungsanlagen für Sicherungsanwendungen -
les applications de sécurité - Partie 2-31: Transmission en Teil 2-31: Videoübertragungs-protokolle - IP-
continu en direct et contrôle basé sur les services web Interoperabilität auf Basis von Webservices - Echtzeit-
(IEC 62676-2-31:2019) Streaming und Konfiguration
(IEC 62676-2-31:2019)
This European Standard was approved by CENELEC on 2019-07-31. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62676-2-31:2019 E

European foreword
The text of document 79/620/FDIS, future edition 1 of IEC 62676-2-31, prepared by IEC/TC 79 "Alarm
and electronic security systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62676-2-31:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-04-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-07-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 62676-2-31:2019 was approved by CENELEC as a
European Standard without any modification.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60839-11-31 -  Alarm and electronic security systems - EN 60839-11-31 -
Part 11-31: Electronic access control
systems - Core interoperability protocol
based on Web services
ISO 12639 -  Graphic technology -- Prepress digital data - -
exchange -- Tag image file format for
image technology (TIFF/IT)
RFC 1952 -  GZIP file format specification_- Version 4.3 - -
RFC 2326 -  Real Time Streaming Protocol (RTSP) - -
RFC 2435 -  RTP Payload Format for JPEG- - -
compressed Video
RFC 2818 -  HTTP Over TLS - -
RFC 3016 -  RTP Payload Format for MPEG-4 - -
Audio/Visual Streams
RFC 3550 -  RTP: A Transport Protocol for Real-Time - -
Applications
RFC 3551 -  RTP Profile for Audio and Video - -
Conferences with Minimal Control
RFC 3640 -  RTP Payload Format for Transport of - -
MPEG-4 Elementary Streams
RFC 3984 -  RTP Payload Format for H.264 Video - -
RFC 4566 -  SDP: Session Description Protocol - -
RFC 6455 -  The WebSocket Protocol - -
RFC 7798 -  RTP Payload Format for High Efficiency - -
Video Coding
Apple Tunneling QuickTime RTSP and RTP over
HTTP
IEC 62676-2-31 ®
Edition 1.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Video surveillance systems for use in security applications –

Part 2-31: Live streaming and control based on web services

Systèmes de vidéosurveillance destinés à être utilisés dans les applications de

sécurité –
Partie 2-31: Transmission en continu en direct et contrôle basé sur les services

web
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.320 ISBN 978-2-8322-7035-6

– 2 – IEC 62676-2-31:2019  IEC 2019
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 12
4 Overview . 13
4.1 General . 13
4.2 Device IO . 13
4.3 Imaging configuration . 13
4.4 Media configuration . 13
4.4.1 Media profiles . 13
4.4.2 Video source mode . 16
4.5 Real-time streaming . 16
4.6 PTZ Control . 17
4.7 Analytics . 18
4.8 Interfaces . 20
5 Device IO service . 20
5.1 General . 20
5.2 VideoOutputs . 20
5.2.1 General . 20
5.2.2 GetVideoOutputs . 20
5.3 VideoOutputConfiguration . 21
5.3.1 GetVideoOutputConfiguration . 21
5.3.2 SetVideoOutputConfiguration . 21
5.3.3 GetVideoOutputConfigurationOptions . 22
5.4 VideoSources . 22
5.4.1 General . 22
5.4.2 GetVideoSources . 22
5.5 AudioOutputs . 22
5.5.1 General . 22
5.5.2 GetAudioOutputs . 23
5.6 AudioSources . 23
5.6.1 General . 23
5.6.2 GetAudioSources . 23
5.7 Capabilities . 23
6 Media service . 24
6.1 General . 24
6.2 Media profile methods . 25
6.2.1 Create media profile . 25
6.2.2 Get media profiles . 25
6.2.3 Add one or more configurations to a profile . 26
6.2.4 Remove one or more configurations from a profile . 27
6.2.5 Delete media profile . 27
6.3 Media configurations . 28
6.3.1 General . 28
6.3.2 Video source configuration . 28

IEC 62676-2-31:2019  IEC 2019 – 3 –
6.3.3 Video encoder configuration . 29
6.3.4 Audio source configuration . 29
6.3.5 Audio encoder configuration . 29
6.3.6 PTZ Configuration . 29
6.3.7 Analytics configuration . 29
6.3.8 Metadata configuration . 30
6.3.9 Audio output configuration . 30
6.3.10 Audio decoder configuration . 31
6.4 Media Configuration Methods . 31
6.4.1 General . 31
6.4.2 Get configurations . 31
6.4.3 Modify a configuration . 32
6.4.4 Get configuration options . 32
6.4.5 GetVideoEncoderInstances. 33
6.5 GetStreamUri . 34
6.6 GetSnapshotUri . 35
6.7 Multicast . 35
6.7.1 General . 35
6.7.2 Start multicast streaming . 36
6.7.3 Stop multicast streaming . 36
6.8 SetSynchronizationPoint . 37
6.9 Video source mode . 37
6.9.1 General . 37
6.9.2 GetVideoSourceModes . 37
6.9.3 SetVideoSourceMode . 38
6.10 OSD (on-screen display) . 38
6.10.1 General . 38
6.10.2 CreateOSD . 39
6.10.3 DeleteOSD . 40
6.10.4 GetOSDs . 40
6.10.5 SetOSD . 41
6.10.6 GetOSDOptions . 41
6.11 Privacy masks . 42
6.11.1 General . 42
6.11.2 CreateMask . 43
6.11.3 DeleteMask . 43
6.11.4 GetMasks . 44
6.11.5 SetMask . 44
6.11.6 GetMaskOptions . 45
6.12 Capabilities . 45
6.13 Events . 46
6.13.1 ProfileChange . 46
6.13.2 ConfigurationChange . 46
6.13.3 ActiveConnections . 47
6.14 Deviations of media service version 1 . 47
6.14.1 General . 47
6.14.2 Profile management . 47
6.14.3 Configuration listing . 48
6.14.4 Privacy masks . 48

– 4 – IEC 62676-2-31:2019  IEC 2019
7 Imaging service . 48
7.1 General . 48
7.2 Imaging settings. 48
7.2.1 Parameters . 48
7.2.2 GetImagingSettings . 50
7.2.3 SetImagingSettings. 51
7.2.4 GetOptions . 51
7.3 Imaging Presets . 52
7.3.1 General . 52
7.3.2 GetPresets . 52
7.3.3 GetCurrentPreset . 52
7.3.4 SetCurrentPreset . 53
7.4 Focus operations . 54
7.4.1 Move . 54
7.4.2 GetMoveOptions . 54
7.4.3 Stop. 55
7.4.4 GetImagingStatus . 55
7.5 Capabilities . 56
8 PTZ service . 56
8.1 General . 56
8.2 PTZ node . 57
8.2.1 General . 57
8.2.2 GetNodes . 57
8.2.3 GetNode . 57
8.3 PTZ configuration . 58
8.3.1 General . 58
8.3.2 GetConfigurations . 59
8.3.3 GetConfiguration . 59
8.3.4 GetConfigurationOptions . 60
8.3.5 SetConfiguration . 60
8.3.6 GetCompatibleConfigurations . 61
8.4 Move operations . 61
8.4.1 General . 61
8.4.2 AbsoluteMove . 61
8.4.3 RelativeMove . 62
8.4.4 ContinuousMove . 63
8.4.5 GeoMove . 64
8.4.6 Stop. 66
8.4.7 GetStatus . 66
8.5 Preset operations . 67
8.5.1 General . 67
8.5.2 SetPreset . 67
8.5.3 GetPresets . 68
8.5.4 GotoPreset . 69
8.5.5 RemovePreset . 69
8.6 Home position operations . 70
8.6.1 General . 70
8.6.2 GotoHomePosition . 70
8.6.3 SetHomePosition . 71

IEC 62676-2-31:2019  IEC 2019 – 5 –
8.7 Auxiliary operations . 71
8.7.1 General . 71
8.7.2 SendAuxiliaryCommand . 71
8.8 Predefined PTZ Spaces . 72
8.8.1 General . 72
8.8.2 Absolute position spaces . 72
8.8.3 Relative translation spaces . 77
8.8.4 Continuous velocity spaces . 78
8.8.5 Speed spaces . 79
8.9 Preset tour operations . 80
8.9.1 General . 80
8.9.2 GetPresetTours . 81
8.9.3 GetPresetTour . 81
8.9.4 GetPresetTourOptions . 82
8.9.5 CreatePresetTour . 82
8.9.6 ModifyPresetTour . 83
8.9.7 OperatePresetTour . 83
8.9.8 RemovePresetTour . 84
8.9.9 Preset tour parameters . 85
8.10 Pan/tilt control direction configuration . 86
8.11 Capabilities . 87
8.12 Events . 88
8.12.1 General . 88
8.12.2 PTZ presets . 88
8.12.3 PresetTours . 88
9 Analytics service. 89
9.1 General . 89
9.2 Scene description interface . 89
9.2.1 Overview . 89
9.2.2 Frame-related content . 89
9.2.3 Scene elements . 92
9.3 Rule interface . 99
9.3.1 General . 99
9.3.2 Rule representation . 100
9.3.3 Rule description language . 100
9.3.4 Operations on rules . 101
9.4 Analytics modules interface . 104
9.4.1 General . 104
9.4.2 Analytics module configuration . 105
9.4.3 Analytics module description language . 105
9.4.4 Operations on analytics modules . 105
9.5 GetAnalyticsModuleOptions . 108
9.6 Capabilities . 109
9.7 Events – Audio Detected . 109
10 Real-time streaming . 110
10.1 General . 110
10.2 Media stream protocol. 110
10.2.1 Transport format . 110
10.2.2 Media transport . 111

– 6 – IEC 62676-2-31:2019  IEC 2019
10.2.3 Synchronization points . 115
10.2.4 JPEG over RTP . 116
10.3 Media control protocol . 118
10.3.1 RTSP stream control . 118
10.3.2 Keep-alive method for RTSP session . 120
10.3.3 RTSP audio and video synchronization . 121
10.3.4 RTSP session for a metadata stream . 121
10.3.5 Multicast streaming . 122
10.3.6 RTSP message example . 122
10.3.7 RTSP over HTTP . 123
10.4 Back channel connection . 123
10.4.1 General . 123
10.4.2 RTSP Require tag . 123
10.4.3 Connection setup for a bi- directional connection . 124
10.4.4 Describe example for a server without backchannel support: . 124
10.4.5 Describe example for a server with ONVIF backchannel support: . 124
10.4.6 Multicast streaming . 126
10.5 Error handling . 126
Annex A (normative) Efficient XML Interchange (EXI) . 127
Annex B (normative) Lens description . 128
Annex C (informative) Specified rules . 130
C.1 General . 130
C.2 LineDetector . 130
C.3 FieldDetector . 130
C.4 LoiteringDetector . 131
C.5 Declarative motion detector . 132
C.6 Counting rule . 133
C.7 Query rule . 134
Annex D (informative) Cell motion detection . 135
D.1 Cell motion detector . 135
D.2 Cell motion analytics engine . 136
D.2.1 General . 136
D.2.2 Module configuration . 137
Annex E (normative) Motion detection . 139
Annex F (normative) Schema files . 141
F.1 Device IO . 141
F.2 Imaging . 156
F.3 Media. 162
F.4 Media 2 . 199
F.5 PTZ . 221
F.6 Analytics . 234
F.7 Common schema . 240
F.8 Streaming metadata schema . 279
Bibliography . 284

Figure 1 – A media profile . 14
Figure 2 – Complete profile configuration . 15
Figure 3 – Layer structure . 16

IEC 62676-2-31:2019  IEC 2019 – 7 –
Figure 4 – Analytics architecture . 19
Figure 5 – Example with four OSD configurations . 39
Figure 6 – Example of screen with mask and coordinate system . 42
Figure 7 – Spherical pan/tilt position space in degrees for a camera mounted on the
ceiling . 74
Figure 8 – Example of changes of pan/tilt control direction by E-Flip and Reverse . 87
Figure 9 – Default frame coordinate system . 91
Figure 10 – RTP header . 111
Figure 11 – RTCP sequence . 114
Figure 12 – RTCP Sender Report . 115
Figure 13 – Media synchronization . 115
Figure 14 – RTP/JPEG packet structure . 116
Figure 15 – Stream control. 119
Figure 16 – Keep alive . 121
Figure B.1 – Optical mapping of angle (α) via radius (R) to normalized x/y coordinates . 128
Figure B.2 – Smooth mapping using B-splines . 128
Figure B.3 – Compensation of vertical axis offset . 129
Figure D.1 – CellLayout of an 8 × 6 CellMotionEngine . 138

Table 1 – Referenced namespaces (with prefix) . 20
Table 2 – Colourspace namespace values . 97
Table 3 – Description of attributes of MotionInCells type . 99
Table 4 – RTP header value . 112
Table 5 – RTSP methods . 120
Table A.1 – ONVIF defined EXI header settings . 127
Table A.2 – ONVIF defined EXI configuration settings . 127
Table C.1 – Loitering Detector rule configuration parameters . 132
Table C.2 – Description of loitering event fields . 132
Table C.3 – Declarative motion detector rule configuration parameters . 133
Table C.4 – Description of declarative motion event fields . 133
Table C.5 – Counting rule configuration parameters . 134
Table C.6 – Description of counting event fields. 134
Table C.7 – Query Rule configuration parameters . 134
Table D.1 – Cell motion detector rule configuration parameters . 136
Table D.2 – Description cell motion detected event fields. 136
Table D.3 – Module configuration parameters . 137
Table D.4 – Description of CellLayout fields . 137
Table E.1 – Motion Region Detector Rule configuration parameters . 139
Table E.2 – Motion region detector rule configuration options . 140
Table E.3 – Description of the motion region detector event fields . 140

– 8 – IEC 62676-2-31:2019  IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VIDEO SURVEILLANCE SYSTEMS FOR
USE IN SECURITY APPLICATIONS –

Part 2-31: Live streaming and control
based on web services
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