THOMSON Broadcast & Media Solutions Chongo Service Training 3/05Page N°1 Chongo Service Training...

THOMSON Broadcast & Media Solutions Chongo Service Training

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Chongo Service Training

Software Summary

James Pearce <[email protected]>


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Architectural Overview

Software ArchitectureOperating SystemsOperating System CommunicationsSystem ComponentsServices

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Software Architecture Overview

Almost identical to M-Series architecture.

Exceptions:• File System stack• Newer Streaming/Transcoding subsystem• New Application front-end

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Operating Systems

Chongo is a multi-tier system, compromising multiple processing components.

Each component runs an appropriately targeted operating system:

Host: Windows XP Embedded

Front Panel: Windows CE

RTS: vxWorks

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Windows XP Embedded

• Componentized version of Windows XP• Using Service Pack 2• Not all components are installed (eg Solitaire)• Installation of 3rd party tools and applications is not permitted

• QFEs and patches are only available from Grass Valley

• Consider it a Grass Valley Operating System

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Windows CE 4.2

• Windows for Consumer Devices, and PDAs• The version we use is built and targeted specifically at the panel device

• OS Image is downloaded and flashed from the host only when necessary.

• Not all system updates will require a reflash of the front panel.

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VxWorks

• The CODEC runs VxWorks• Provides Real-Time capabilities• Good intertask communication and synchronization

• Fast interrupt responses• RTS image is flashed on system update

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OS Communication

• Windows CE and Windows XP Embedded communicate through USB.

• The software uses DCOM (a remote inter-process communication framework).

• DCOM Permissions must be configured correctly on the host

• To check DCOM permissions:msdtc –installdcomcnfg

• Firewall must be disabled*• If in doubt – run a system repair

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WinCE to XPe Communication

DCOM Application communication layer

TCP Maintains a reliable pipe-like connection

IP Internet datagram (packet) protocol

PPP Point-to-point protocol provides networking support over serial lines

USB Physical layer

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OS Communication

• vxWorks and Windows XP Embedded communicate across the PCI bus

• Use short KIPM messages to communicate with each other

• Mechansim provided by a device driver (kipmdrv.sys)

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System Software Components

Installed on top of the Windows XPe OS:–DirectX–MSDE–MSXML–MainConcept MPEG–ActiveSync–Quicktime–Windows Media libraries

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DirectX 9

• A set of loosely related media technologies• We use DirectDraw and DirectShow for streaming, transcoding (importing and exporting), and firewire device imports

• DirectShow is an API for streaming media. Very flexible – supports any format or device

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MSDE 8 SP3

“Microsoft Desktop Engine”• A cut-down version of SQL Server for desktop applications

• Includes hard-wired resource limitations• It’s free

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MSXML

• XML itself is “Extensible Markup language”• MSXML is an API from Microsoft for manipulating XML

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MainConcept MPEG libraries

• The MainConcept libraries are used for MPEG2 encoding and decoding in software

• We use them for file imports and exports and firewire imports

• Provide good performance and support for HD

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ActiveSync 3.8

• Normally used for synchronization of PDA devices

• We use it for communication with the Front Panel

• Provides TCP/IP support over USB• Provides RAPI access from the host for image flashing and file copying

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Quicktime 6.5

• A set of libraries from Apple for reading and writing Quicktime files, as well as editing and streaming services

• We use if for Quicktime file decoding when importing files

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Windows Media Format 9.5 libraries

• A set of libraries from Microsoft for the encoding and decoding of Windows Media Audio and Video

• Used by file transcode subsystem for the import and export of Windows Media files

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Services

• Since XP Embedded is a targeted operating syystem, all services are critical to normal usage

• If suspicious services appear in the list, perform a system repair/update

• Do not stop or remove services


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Software Operation

System InstallerAppCenterFront PanelConfigurationMediaMonitorRecorderPlayerPlaylist

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System Installer

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System Installer

• Runs from a bootable CDSimply put the CD in the CDROM tray and reboot

Follow the on-screen instructions

• No Setup.exe• Replaces the OS too• Fire and forget

Once installation started, no user input required

• Two options available•Update/Repair•Reset to factory defaults

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System Installer

Update/Repair• Replaces the system software• Overwrites contents of C: drive• Media and Configuration is retained• May not be available if system is badly corrupted or a existing version could not be found

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System Installer

Reset to Factory Condition• Overwrites all data• Rebuilds partition table• All media lost• All configuration lost

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System Installer

“Secret” options:

Press Ctrl+O to enter option mode -- asterisk appears in title bar. Press the following to enable/disable features:

• Ctrl+B: Disable reboot on completion• Ctrl+L: Disable RTS loader stage• Ctrl+F: Switch on low-level disk formatting• Ctrl+P: Open a command prompt

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AppCenter

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AppCenter

• Brings channel applications, asset management and configuration together

• Launches automatically at system start• Manages resource control with front panel• Runs as a collection of applications running in separate address spaces

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Front Panel

Provides a large sub-set of the functionality available from AppCenter

Functionality not available from the front panel includes:

• Network streaming• Asset metadata editing and searching• On-line help

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Configuration

• Access from AppCenter’s “File” menu• Configurable items:

•System•Channel•GPI•Front Panel

• Configuration is stored as XML files in V:\System\<HOSTNAME>\config

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Configuration

System includes:• Reference Standard

•Set to NTSC for 59.94 Hz recording and playout•Set to PAL for 50 Hz recording and playout

• Data rate•Sets the MPEG bit-rate for recording

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Configuration

ChannelsRecorder includes:• Video/Audio input type

Selects the baseband inputs for audio and video

• Noise reductionEnables and sets the level of the Lee Filter

• Audio Input FormatFor digital audio recording – selects AC-3 or PCM

audio

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Configuration

Channels

Players include:• Output Format

SD or HD video format

• Aspect Ratiothe ratio of the playout monitor

• Aspect Ratio conversionHow to convert mismatching formats

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Aspect Ratio

• A clip can be 4:3 or 16:9• A clip’s aspect ratio is independent of its format or resolution.

• For example, a 720x480 SD clip could be 4:3 or 16:9

• A clip’s aspect ratio is simply an indication of it’s intended display format

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Aspect Ratio

• Asset aspect ratio is separate to output monitor aspect ratio

For example, a clip might be 16:9, but a display projector might be 4:3

• The asset aspect ratio is set when it is recorded• The output aspect ratio is set thru configuration• Conversion hints indicate how a 4:3 clip should be

displayed on a 16:9 display or vice versa– Bars – pads the picture with black bars– Crop – removes parts of the active frame to fit the display– Bars and Crop – half and half

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MediaMonitor

• Used for Asset Management• View asset properties• Send assets to file, stream, or another bin• Import assets from file or stream• Rename and Delete assets• Search for assets• Apply metadata to clips

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MediaMonitor

• Drag-drop assets into Players and PlayList• Cut and Paste assets between bins• Create new bins, Delete bins• Drag-drop files from desktop to initiate imports

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MediaMonitor

Streaming, File Import and Export• Supported file formats are controlled through plugins• Imports, Exports and Streaming run in parallel to normal

operation• View ongoing operations from the Transfer Monitor

(File Transfer Monitor)• Executables called “Sessions” run the import, export or

stream instance• A maximum of 4 sessions are executable at one time

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Recorder

• “New Clip” creates a named, empty clip• “Preview” loads the currently recording clip into the player• “Properties” shows properties of the currently recording clip• TimeDome shows space remaining

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Recorder Options

Recorder options are available in the “Recorder” menu item when the recorder is active

• Widescreen (16:9) or Standard (4:3)•Configures the recorded clip as 16:9 or 4:3 material

• IEEE1394 or base-band recording•Configures the recorder for Firewire import•Supports DV, MPEG and HDV devices•Transport controls control device

Other options available in Channel Configuration

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IEEE1394 Recorder

• Frame accurate fixed length records for DV. Non-frame accurate for MPEG.

• IEEE1394 imports from DV require transcoding to MPEG

• A special sparse buffer file is used to allow background transcode from a real-time source

• Once the device record is finished, the clip can be ejected – the transcode will continue

• Can record from devices without transport controls (such as camcorders in Camera mode, or DTV decoders)

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Player

• “Load Clip” loads a clip from a bin• “Subclip” allows the user to create a subclip from the loaded clip• “Goto” allows scrollbar access to any position in the clip

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Player

Fully Agile:•Format of clip and format of output channel are

independent•System Reference must match

EE supported

Simple Editing•Trimming•Subclips

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Playlist

• “Insert” inserts a new clip• “Properties” shows the properties of the currently active clip• “Goto” allows scrollbar access to any position in the playlist

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Playlist

Mixed Media supported•Can mix HD and SD clips in the same list


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Software Diagnostics

Log

System Traps

DbgView

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Log

• System Logs are stored as mmf files in c:\logs

• View logs using the system log viewer:c:\profile\log.exe

• Export log using the export log utility:c:\profile\exportlog.exe

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System Traps

• System traps are viewable from AppCenter• HelpSystem Status• Provide more user-friendly errors than the log• Can be generated from non-Grass Valley components•Motherboard devices (fans, etc)•Hard Disks•Etc

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DbgView

• DbgView is a 3rd party tool from SysInternals• Views Windows System log• Useful for lower-level debugging• Not all components log to the Windows System log

• Useful as a last resort• Download from http://www.sysinternals.com

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Q&A

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