VBrick Systems VB6000 Using Multiple Bit Rate Streams, MBR Output Streams, Other Considerations

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Other Considerations

Keep in mind these additional details. The VBrick Pull Reflector:

•Supports up to five redirects.

•Supports the first (or only) HREF entry in an .asx file. Additional entries in the file are ignored.

•Only pulls streams via HTTP. It will accept an MMS URL but will use HTTP for streaming from that URL.

•Cannot pull multicast.

•Cannot pull from a server-side playlist.

Using Multiple Bit Rate Streams

A VBrick WM Appliance (v4.0 or higher) has three internal video encoders and three internal audio encoders that each produce a separate output stream as shown in Figure 3. These streams can have different rates and characterizations and consequently can be used for different applications. This feature allows these multiple applications to be served in a cost- efficient manner. Some sample applications are listed below. All of these applications can be simultaneously supported by a single WM Appliance.

Note System performance, particularly when using multiple bit rate streams, is directly affected by configuration selections. See Optimizing System Performance on page 14 for guidelines and suggestions.

•Multicast – Typically a multicast stream is high bandwidth since multicast is normally supported only on high-bandwidth networks.

•Unicast – Often unicast clients, who may be located on the Internet, are offered lower bandwidth streams.

•Archive – It may be useful to archive content containing multiple data rates. This archived stream can be transferred to an appropriate VOD system such as VBrick's EtherneTV Portal Server for serving at different data rates to different clients.

•Reflection – For an organization that has a distributed infrastructure with multicast-capable offices connected by lower bandwidth non-multicast enabled links, it may be useful to push/pull a unicast stream to a reflector for redistribution and/or archiving at the remote site. The reflector can be provided by a Windows Media Server or by the reflecting capability of VBrick's WM appliance.

•Multiple Bit Rate – These differently formatted video and audio streams can be served simultaneously and the Windows Media Player will select and play the best stream— based on bandwidth and other factors—from among the multiple streams that are available. In the Microsoft world, this concept is generally called multiple bit rate. With multiple bit rate, the player automatically selects the highest quality version of the stream that fits the limitations of the network, and end users receive a continuous flow of content that matches their specific connection speeds.

MBR Output Streams

The VBrick WM Appliance implementation of MBR lets you optionally enable and independently configure up to three video encoders (Video Rates 1, 2, and 3) and up to three audio encoders (Audio Rates 1, 2, and 3). They all run different encoding algorithms at the same time on a single WM appliance. Various configuration options let you select different

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© 2008 VBrick Systems, Inc.

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Contents VB4000-5000-6000 Series Network Video Appliances Copyright Contents SDI Configuration StatusMaintenance Mode DiagnosticsMaintenance WM TemplatesStream Prioritization IndexWM Admin Guide OrganizationGetting Help Getting the Best VideoFont Conventions Printer-FriendlyPreface Overview System Requirements for Windows Media PlayerTopics in this chapter Typical VBrick Applications Standard FeaturesStandard Feature Encoder Reflector Http TCPApplication Description VBricks Streaming EcosystemMulticasting UnicastingVBrick Reflecting ReflectingReflecting from VBrick Appliances Push ReflectingPull Reflecting Push Reflecting from a Windows Media ServerPull Reflector Type Using Multiple Bit Rate Streams MBR Output StreamsOther Considerations Configurable Input/Output Stream Rates WM Output Streams Output DescriptionMBR Output Settings Shared Video Settings Independent Video SettingsHTTP/RTSP Shared Audio Settings Independent Audio Settings MBR GroupsMBR Troubleshooting Using On Demand Playback Optimizing System Performance Mixed Model AppliancesArchiver and Recorder Functionality Archiver/Recorder FunctionalityVBrick Systems, Inc WM Configuration Configuration Network Configuration Network EthernetDomain Name Server Numbers or hyphensConfiguration Network Routing Network Time SynchronizationWM Configuration Configuration Network Management Template Name Description Configuration EncoderConfiguration Encoder Template LANConfiguration Encoder Video Windows Media Encoder Video -- Slot1 SvidVBrick Systems, Inc Reduces the saturation Settings to allow this Tools Options Security Run Script Video Template Settings -- Slot1 Video Rate1 Video Rate1 Video Rate2 Video Rate3Video Rate1 Video Rate2 Video Rate3 WM Configuration Configuration Encoder Audio Audio Template Settings Bit Rate and Sample Frequency Stereo MonoConfiguration Encoder Multicast Windows Media Encoder Multicast -- Slot1 Multicast Playback NSC File Information -- Slot1Configuration Encoder Announce SAP Windows Media Announce Common Information -- Slot1 Bit mask. This string is simply another keyword you can use Configuration Encoder Server Announce Program Guide SAP for Multicast -- Slot1Windows Media Encoder Server -- Slot1 HttpRtspu Http URLRtspu URL Unicast Playback Rtsp UDPAnnounce Http and Rtspu Server Http SAP Rtspu SAPRtsp URL ASX Rollover Announce External Server -- Slot1Creating Publishing Points Creating Publishing Points on Windows Media ServersCreating Non-Authenticated Push Publishing Points Creating Publishing Points on Helix Universal ServersConfiguration Encoder Archiver Creating Pull Publishing PointsWM Configuration Windows Media Archiver -- Slot1 FirmwareWM Configuration FTP Server Enable Progressive DownloadConfiguration Encoder Push Http Push Slot1VBrick Systems, Inc Configuration Reflector Configuration Reflector Source Push ReceiverPull Receiver ASX Microsoft Server on-demandPulling MBR Streams Pulling VOD Files from a Microsoft WM ServerConfiguration Reflector Multicast Configuration Reflector Announce SAPConfiguration Reflector Server Configuration Reflector Archiver Configuration Reflector Push Configuration Jpeg Jpeg Configuration Jpeg FTP Configuration Jpeg Capture ConstraintsConfiguration FTP File Transfer Configuration FTP File Transfer ServersModel Jpeg Configuration Max Clients † FTP Server Configuration FTP File Transfer Transfers FTP StatusConfiguration Passthrough Hard Drive StatusFTP Queue Operation Configuration Passthrough COM1 Passthrough State ResponderPassthrough State Initiator WM Configuration Configuration System General Configuration SystemConfiguration Passthrough COM2 SystemConfiguration System Snmp Traps Front Panel LCD DisplayProgram Files\VBrick\VB6000\Download\ReleaseVxxxxxx Number Event Description Configuration System Security Improving Security Page Configuration Script Management Configuration Script Management Event TriggeringRun Scripts Using IWS VBrick Systems, Inc Run Scripts Using the IR Remote Control Run Scripts Using Event TriggersSample Script Configuration Script Management Auto Configuration Scripting NotesURL VBrick Systems, Inc SDI Configuration IntroductionConfiguration Encoder Video Configuration Encoder Audio SDI Limitations Video Limitations with SDI Video InputAudio Limitations with SDI Video Input and SDI Audio Input VBrick Systems, Inc Status Status System InformationGeneral Status Network StatusStatus Network Status Codec InterfaceStatus Network Status Routing Status Encoder Status Status Network Status Network TimeVideo PLX EepromAudio Close CaptioningMulticast Status Reflector StatusStatus Reflector Status General Push ReceiveStatus Jpeg Status VBrick WM Appliance Admin Guide 101 Status Hard Drive Status Hard Drive General Status Hard Drive ArchiverVBrick WM Appliance Admin Guide 103 Status Server Status Encoder Details Status Server StatusStatus Server Status General HTTP/RTSP ServerStatus Push Status Status Server Status Reflector DetailsHttp Push Status Status System Log Config Status FTP Server Status Status System LogStatus System Log System Event Status System Log Traps Status System Log System InfoStatus User Information Status User Information Main BoardStatus User Information Slot1 112 Diagnostics Network Tests Diagnostics Network Tests Ping TestDiagnostics Network Tests Trace Route Test PDUDiagnostics Device Test Trace Route Test ResultsWhen done, reset Configured Operational Mode to Run Diagnostics Hard Drive 118 Maintenance Maintenance Device InformationMaintenance Default All Configuration Maintenance Read/Write ConfigurationMaintenance Read/Write Read From Device Read Configuration Data from Device Maintenance Read/Write Write To Device Sample VBrick Configuration FileMaintenance Usernames & Passwords Write Configuration Data to Device124 Maintenance Usernames & Passwords Change SNMPv3 Passwords User Level Default User Name Default Password Authority126 Maintenance Mode Maintenance Mode Features Maintenance Mode IndicatorsMaintenance Mode Limitations Maintenance Mode CLI Operation Command Description EntrySubnet mask associated with WM Templates Video Encoder Parameter Setting Best QualityCBR/CFR Audio Encoder Parameter Setting Cable/DSL-300K, High MotionCable/DSL-300K, Low Motion Cable/DSL-128K, High MotionCable/DSL-128K, Low Motion Modem 56K Security & SurveillanceAudio Channels Mono L +R Bit Rate 8000 Sample Frequency KHz Stream Prioritization Stream PrioritizationExample 1 Priority List Non Bitrate ConstrainedBitrate Constrained Example 2 Redundant ListFor Archiving, and Pushing to or Pulling from a WM Server How the WM Appliance Creates Priority ListsFor Group Serving Example 4 Sliding Window BehaviorConfiguring Groups Safe Group ConfigurationsIndex Initiator Device Test Network Tests 144
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