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Extron electronic 68-1998-01 REV. C Multicast RTP An Overview

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Multicast RTP — An Overview

Multicast RTP allows a source to be displayed on multiple displays. This method uses a

real‑time variation of UDP (User Datagram Protocol) called RTP (Real‑time Transport

Protocol).

SOURCE

DISPLAYS

RTPRTP

RTP

RTP

RTP

RTP

Encoder sends data using RTP

to a multicast group.

Multiple decoders can be

part of the multicast group.

Network

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

LAN-1

LAN-2

STATUS

Figure 2. Multicast RTP Streaming

The source encoder uses RTP to send data to a multicast group. The source does not need

to know the IP address of the decoders that are using the source.

RTP provides very low latency which is important for video streaming. Unlike other

protocols, RTP packets include a time stamp. If packets are received in the wrong

order, they are sorted into the correct order for display or discarded if the time stamp is

out‑of‑date.

However, because RTP is a connectionless protocol, data delivery is not guaranteed.

When data packets are lost (for example, due to excessive network trafﬁc), the

VN‑Matrix 200 / 225 / 300 / 325 devices carefully manage the data stream to minimize any

image disruption.

VNM Recorder • Introduction 4

Contents

Main Safety Instructions ii Safety Instructions English W ARNING: FCC Class A Notice Specifications Availability Conventions Used in this Guide E X!*X1&*X2)*X2#*X2! CE} Contents Introduction ............................................1 Panels and Cabling .................................8 Recorder Conguration and Hardware Setup ......................................................12 About the Web-based User Interface ........................................ 23 Recording and Playing Streams ........... 48 About Alarms ........................................55 Reference Information .........................62 Firmware Updates .................................63 Browser Conguration ......................... 68 Introduction About this Guide About the VNM Recorder Overview of Recorded Streams Overview of Stream Playback About RAID5 Storage Transport Protocols Used for Streaming Multicast RTP An Overview Unicast RTP An Overview Unicast TCP An Overview Denitions Features Panels and Cabling Installation Overview Front Panel Features a b c d Power Overheat/Fan Failure Power Supply/Fan Failure Drive Activity Network Activity (1) Network Activity (2) e Page Page Recorder Conguration and Hardware Setup Setup Overview VNM Recorder Power Up Procedure Login Information VNM Recorder Power Down Procedure Using the Front Panel Using the Keyboard and Mouse Choosing the Controller Device Conguring the VNM Recorder Default Network Settings Conguring the Network and IP Address Settings Stage 1 Congure the network settings Page Page Stage 2 Setting the controller IP address Page Stage 3 Restart the VNM Recorder Conguring the VN-Matrix Encoders and Decoders About the Web-based User Interface Overview of the Web-based User Interface Accessing the Web-based User Interface Web-based User Interface Control Options Device List Page a b ? c d e a b c d Recorder Page a b c d e Navigate Page a b c d e f g Player Page Selecting a recording for replay a b c d e Advanced Conguration Cong Page a b . c . e f g Accounts Page Changing User Login Passwords a b c d VN-Matrix Encoder and Decoder Conguration About the Content Directory Overview Content Directory Basics Setting a Stream Storage Location Creating a Directory Understanding Saved Recordings With Multiple Elements Renaming a Stream or Directory Deleting a Stream or Directory Recording and Playing Streams Initial Setup and Conguration Setting up a VN-Matrix Codec as a Decoder Setting up a VN-Matrix Codec as an Encoder Switching a Codec between Encoder and Decoder Recording a Stream Recording Preparation Initialize Recording Stop Recording Playing a Recorded Stream Playback Preparation Initialize Playback Pause Playback Stop Playback Start and Finish Times Auto Repeat Using Bookmarks File Structure Playback of Bookmarked Streams Deleting Bookmarks About Alarms Overview Alarms Page Filter Settings Alarm Type Alarm Severity Applying Alarm Filter Settings Alarm List Alarm Logs Page Alarm Reference Tables Alarm Type Description Encoder Alarm Type Description Decoder Alarm Type Description System Controller Page Firmware Updates Preparing the Firmware Gathering Firmware Installation Information Installing the Firmware Page Page Browser Conguration Microsoft Internet Explorer (version 7 or above) Page Page Mozilla Firefox (version 1.3 or above) Mounting Tower Installation Rack Installation UL Guidelines for Rack Mounting Rack Mounting Page Page Extron Warranty