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Sun Microsystems 2.1 manual Underperforming stream output, No video displays on client

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Underperforming stream output

Possible cause is network congestion. Use a network analyzer or your switch vendor’s diagnostics to analyze network performance.

Note that your server is intended only for the storage and delivery of multimedia streams. Any processes not associated with this purpose have the potential to disrupt server output.

No video displays on client

Possible causes: Disk cables and/or network links not connected. If using ATM, ATM switch not conﬁgured correctly. Content is stored at a bit rate different from that at which it was encoded.

If you have SunNet Manager, do a quick dump of the sms-vod>activeattribute to conﬁrm that there are active streams. If you do not have SunNet Manager, use snoop, atmstat, and/or switch diagnostics to check on streams. If there are active streams, conﬁrm that the bit rate you are using to play the stream is correct.

Note that on a correctly running server, the following processes should be running:

root	4	0	1	Nov 13		?	0:00 vod_hires_timer
root	231	1	0	Nov 13		?	0:00 vod_xor
root	232	1	0	Nov	13	?	0:00	vod_xor
root	233	1	80	Nov	13	?	0:13	vod_sched

If you are using an application based on the Media Stream Manager Client API, the following process must be running:

root 241	1 80 Nov 13 ?	2:18 /opt/SUNWsms/msm/bin/MsmServer

If any of the preceding processes is not present in ps output, you might have to reboot the server.

Another possible cause of this problem, for Fast Ethernet destinations, is that the IP address and/or Ethernet address of the destination client are not recorded in a name service accessible to the server or not in the server’s local /etc/hosts and /etc/ethers ﬁles.

10-2Sun MediaCenter Server Administrator’s Guide • December 1997

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Sun Microsystems 2.1 manual Underperforming stream output, No video displays on client

Contents

Sun MediaCenter Server Administrator’s Guide ReleaseA Sun Microsystems, Inc. Business 901 San Antonio Road Palo Alto, CA 94303 USA 415 960-1300 fax 4151997 Sun Microsystems, Inc. All rights reserved 1. Introduction Contents2. Preparing and Loading Content 3. Monitoring the Server 4. Moving Contentiv Sun MediaCenter Server Administrator’s Guide December 5. Sun MediaCenter Server Utilities 6. Sun MediaCenter Server FTP Daemon8.2.1 mfs df 8.2.2 mfs diskusg 8.2.3 mfs repair 8.2.4 mkmfs vi Sun MediaCenter Server Administrator’s Guide December9. Access Control Lists 10. TroubleshootingA. Setting up the SNMP Agent B. Creating a Content Package B-1viii Sun MediaCenter Server Administrator’s Guide December Glossary Glossary-1 Index Index-1Preface Who Should Use This Bookx Sun MediaCenter Server Administrator’s Guide December The Sun MediaCenter Documentation SuiteHow This Book Is Organized What Typographic Changes Mean TABLE P-1 Typographic ConventionsShell Prompts in Command Examples xii Sun MediaCenter Server Administrator’s Guide DecemberTABLE P-2 Shell Prompts ShellIntroduction 1.1 Introduction1.2 Sun MediaCenter Hardware Control Content From tape, network-accessible ﬁle, or live source Sun MediaCenter ServerFast Ethernet or ATM Fast/Wide or Ultra SCSI Media File System Files1.3 Sun MediaCenter Software FIGURE 1-2 Sun MediaCenter Software ArchitectureGuaranteed stream delivery rate Recovery from single-disk failures1.3.1 Media File System MFS Independent streamsHigh-resolution rate control Random accessHot swappability Efﬁcient use of disk bandwidth1.3.2 Media Stream Manager Media File System Layout Manager Scheduler Bit Pump BuffersDisk Driver Output Driver1.3.3 Content Manager 1.4 Video Output Interfaces1.3.4 Web-based Tools MediaCenter Server Programmer’s GuideFIGURE 1-4 Sun MediaCenter Servers in ATM Environment 1.4.1 ATM1.4.2 LAN 1.5 Content Preparation and Loading FIGURE 1-5 Sun MediaCenter Servers in LAN environment1.6 Server Management 1.7 Push Model1.8 Design Beneﬁts 1-12 Sun MediaCenter Server Administrator’s Guide DecemberPreparing and Loading Content 2.1 General MPEG Encoding Requirements2.2 MPEG Encoding Requirements for Trick Play 2.3 Splice Points 2.3.1 Packet Boundary2.3.3 payloadunitstartindicator 2.3.5 randomaccessindicator2.3.2 closedgop 2.3.4 adaptationﬁeldcontrol2.4 Content Loading To copy to or extract from a tape device, use smctar 2.5 References 2-8 Sun MediaCenter Server Administrator’s Guide December Monitoring the Server 3.1 Overview3.2 Using the WebAdmin Tool 3.2.1 Invoking the ToolFIGURE 3-1 Sun MediaCenter Page Chapter 3 Monitoring the ServerFIGURE 3-2 Resource Utilization Page 3-4 Sun MediaCenter Server Administrator’s Guide DecemberOnce the applet loads, the Resource Utilization page is displayed 3.3 Resource Utilization 3.2.2 Common Page Elements3.4 Streaming Videos TroubleshootingVideos being copied Disk CapacityFIGURE 3-3 Streaming Videos Page 3-8 Sun MediaCenter Server Administrator’s Guide December the title being viewedspeed Fast-Forward, Slow Motion, Stopped, Playing, Reverse FIGURE 3-4 Streaming Videos Page with Stream Detail3.5 Copy Sessions title of the content being transferred Chapter 3 Monitoring the Server The Session Information page is shown belowFIGURE 3-6 Session Information Page 3.6 Disk Capacity FIGURE 3-7 Disk Capacity Page The Disk Info page is shown below 3.7 Troubleshooting The bottom portion of the page shows any late events or disk errorsThe Troubleshooting page is shown below Chapter 3 Monitoring the ServerThe Troubleshooting page contains the following links 3.7.1 Disk Health This page shows the status of disks in the MFSThe Disk Health page is shown below Chapter 3 Monitoring the Server3.7.2 Console Log FIGURE 3-11 Console Log Page Chapter 3 Monitoring the ServerThe Bitpump page is shown below 3.7.3 Scheduler and Bitpump3-20 Sun MediaCenter Server Administrator’s Guide December TABLE 3-1 describes the ﬁelds in this page TABLE 3-1 Scheduler and Bitpump StatisticsTABLE 3-1 Scheduler and Bitpump Statistics Continued bitPump bitPumpStreamsCurrent number of bit pump streams bitPumpBandwidth3-24 Sun MediaCenter Server Administrator’s Guide December Moving Content 4.1 Overview4.2 Using CmTool 4.2.1 Invoking the ToolChapter 4 Moving Content FIGURE 4-1 Sun MediaCenter PageFIGURE 4-2 Table of Contents Page 4-4 Sun MediaCenter Server Administrator’s Guide December4.3 Loading Content 4.2.2 Common Page Elements4-6 Sun MediaCenter Server Administrator’s Guide December Upon successful login, the Load Content page is displayedFIGURE 4-3 Server Login Page FIGURE 4-4 Load Content Page FIGURE 4-5 Content on Remote System 4-8 Sun MediaCenter Server Administrator’s Guide DecemberChapter 4 Moving Content FIGURE 4-6 Specifying a Local Title4-10 Sun MediaCenter Server Administrator’s Guide December FIGURE 4-7 Copy ConﬁrmationFIGURE 4-8 Session Information 4-12 Sun MediaCenter Server Administrator’s Guide December 4.4 Table of Contents PageFIGURE 4-9 Table of Contents Page 4.4.1 View Menu FIGURE 4-10 Display Attributes Dialog BoxFIGURE 4-12 Filter Dialog Box 4-14 Sun MediaCenter Server Administrator’s Guide DecemberFIGURE 4-11 Sort Dialog Box 4.4.2 Selected Menu FIGURE 4-13 Title Information Page4-16 Sun MediaCenter Server Administrator’s Guide December 5.1 Setting a Title Access Control List Sun MediaCenter Server UtilitiesTo extend access for a title that you own, use the smcsettacl command where username is a Solaris login name hostnametitle 5.2 The smccopy Utilitytitle ﬁlename hostnameﬁlenamer rate s speedt type The following are examples of smccopy useThe following command copies a ﬁle between two local ﬁlesystems b blknum 5.3 The smctar Utility5.3.1 Syntax and Options 5.3.2 Content Loading 5.3.3 Copying Content FIGURE 5-1 Loading Content with smctarSun MediaCenter MFS Titletar Device or File Optional Sun MediaCenter Title MFS5.3.4 Remote Copying and Extraction 5.3.5 Examplesserver# tar cf - your title.TOC your content.mpg smctar xf remotehost# tar cf - your title.TOC your content.mpg smctar xf \server# smctar xf /dev/rmt/0 smcserverbambi remotehost# smctar cf /dev/rmt/0 smcserverbambiAn alternative to the preceding commands is #!/bin/sh # smcbackup Script to archive multiple SMC titles to tape 5-16 Sun MediaCenter Server Administrator’s Guide December 5.4 The smcls Utility Display the format of this title Display the time the title was last modiﬁed smcls my-server”a-z*” 5-20 Sun MediaCenter Server Administrator’s Guide Decemberclient% smcls -lt server% smcrm SUNWbambi SGIquovadis 5.5 The smcrm Utilitysmcls -lrtB 5-22 Sun MediaCenter Server Administrator’s Guide December Sun MediaCenter Server FTP Daemon 6-2 Sun MediaCenter Server Administrator’s Guide December FIGURE 6-1 Sun MediaCenter FTP FunctionsStandard Daemon6.1 Keyword for Video-File Functions 6.2 Video-File Attributes 6.3 Video-File Commands delete dir get ls mget mls mput put renameftp dir smctitle=Bat\ 6-6 Sun MediaCenter Server Administrator’s Guide Decemberftp dir smctitle=\ list continues to conclusion 6.3.1 Listing Fileslist continues to conclusion 6-8 Sun MediaCenter Server Administrator’s Guide December 6.3.2 Moving Files 6.3.2.1 Moving Single Titles Directions of put/ get CommandsPage 6.3.2.2 Moving Multiple Titles 6.3.3 Renaming Files 6.4 Loading Content with ftp 6.3.4 Deleting Files331 Password required for clinton. Password encodingmachine% ftp smcserverone Connected to smcserverone230 User clinton logged in. ftp lcd /home/encode ftp bin 200 Type set to6-16 Sun MediaCenter Server Administrator’s Guide December Server Output Data Format 7.1 IntroductionContent 7.2 ATM Encapsulation7.2.1 MPEG-2 Transport Stream Packet Encapsulation Sun MediaCenter Server7.2.2 MPEG-2 Program Stream Packet Encapsulation 7.2.3 MPEG-1 System Stream Packet Encapsulation7.2.4 Thomson Electronics Packet Encapsulation 7.2.5 MPEG-2 Encapsulation over Classical IP over AAL57.3.2 MPEG-2 over Classical IP over AAL5 7.3 ATM Addressing7.3.1 MPEG over AAL5 7.4 Fast Ethernet Encapsulation host=IP hostname,udpport=UDPport num7.4.1 MPEG-2 Transport Stream Packet Encapsulation FIGURE 7-2 LAN/Enterprise Scenario7.5 Fast Ethernet Addressing 7.4.2 MPEG-2 Program Stream Packet Encapsulation7.4.3 MPEG-1 System Stream Packet Encapsulation 7.4.4 Thomson Electronics Encapsulation7.6 Specifying Encapsulation TABLE 7-1 Value of encap Field in MsmConnect7.7 Differences Among Different Types of Links 7.8 References7-10 Sun MediaCenter Server Administrator’s Guide December Administering MFS Disks 8.1 Monitoring MFS Disks8.2 MFS Utilities 8.2.1 mfs dfmfs df usage is as follows 8.2.2 mfs diskusg 8.2.3 mfs repair d device mfs repair usage is as followsTo ﬁnd out which MFS disk has failed, you enter 8.2.4 mkmfs Drive name /dev/rdsk/c1t1d0s2 Drive name /dev/rdsk/c1t2d0s2 8.3 Replacing a Failed Disk 8-10 Sun MediaCenter Server Administrator’s Guide Decemberserver# mfs repair -rp -d /dev/rdsk/c1t4d0s2 server# mfs repair -r -d /dev/rdsk/c1t4d0s2server# mfs repair -p -d /dev/rdsk/c1t4d0s2 Note -Two overlapping disk failures result in a system panic Access Control Lists 9.1 ACL Files9.2 Permissions 9.3 Server ACLuserpermission nobodypermission9.4 Player ACL 9.5 Title ACL 9.6 Session ACLA session ACL has a single type of permission 9-6 Sun MediaCenter Server Administrator’s Guide December Server watchdog resets on start of video stream playback Troubleshooting10.1 Symptoms and Possible Solutions/ Workarounds 10-2 Sun MediaCenter Server Administrator’s Guide December Underperforming stream outputNo video displays on client Poor video quality Corrupt disk labelsKernel panic with SAHI queue threshold messages Disk failureUnable to create title on the MFS 10.2 Error Messages10.2.1 Server Console Messages 10.2.2 MFS Error Messages WARNING stream id 107 ba@426,3,80@ xmit error Q sizeNOTICE ba0 qsize OK NOTICE ba3 qsize 9 above hiwat10-6 Sun MediaCenter Server Administrator’s Guide December Setting up the SNMP Agent A.1 The Sun MediaCenter Server MIB TABLE A-1 Sun MediaCenter Server MIB DeﬁnitionsAppendix A Setting up the SNMP Agent A-3 diskErrordiskErrorTable bitPumpA-4 Sun MediaCenter Server Administrator’s Guide December diskTablefailure onlineAppendix A Setting up the SNMP Agent A-5 sysZonesPerDisksysTimePeriodLength sysNumberOfBuffersA.2 Enabling Management by Solstice Domain Manager 1. Become root5. Run $SNMHOME/bin/mib2schema smsvod.mib This command creates smsvod.mib.schema and smsvod.mib.oid4. Copy smsvod.mib to $SNMHOME/agents Under “instance elementCommand”6. Run buildoid with no arguments A.3 Enabling Trap Handling The Sun MediaCenter software ensures delivery of media streams at the same rate at which they were recorded. The bit pump’s missing of a deadline indicates that the machine was, at least momentarily, unable to keep up with the rate of a title. This indicates a resource conﬂict on the server Creating a Content Package B.1 Content Package B.2 The TOC File A TOC ﬁle is described with the following structures B.2.1 ContentObjects B.2.1.1 titleB.2.1.2 version B.2.1.3 formatB.2.2 BitStreamObjects B.2.1.4 descriptionB.2.2.1 description B.2.2.2 speedB.2.3 DataFileObjects B.2.2.3 bitrateB.2.2.4 indexﬁle B.2.2.5 indexsizeB.2.3.3 ﬁlesize B.3 Simplest Case TOC FileB.2.3.2 ﬁlepath B.4 TOC File for Large Files titleversion formatB.5 Index File Requirements B.5.1 Normal Play Time B.6.1 Tar Format B.6 Tape Storage FormatB.5.2 File Offset Appendix B Creating a Content Package B-13 FIGURE B-2 Tape Storage FormatB.7 Example B.6.2 TapesCODE EXAMPLE B-1 Example Content Package Appendix B Creating a Content Package B-15B-16 Sun MediaCenter Server Administrator’s Guide December For a ﬁle bambi.1x index ﬁle for normal-speed play B.8 References Appendix B Creating a Content Package B-19 B-20 Sun MediaCenter Server Administrator’s Guide December Glossary Glossary-1Media Stream Manager Table of Contents Glossary-3Glossary-4 Sun MediaCenter Server Administrator’s Guide December Index Page Page Page Page Index-6 Sun MediaCenter Server Administrator’s Guide December