Windows Media Encoder: Understanding Configuration and Usage, Slides of Data Communication Systems and Computer Networks

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Window Media Encoder

Windows Media Encoder

 Windows Media Encoder overview

 Understanding template stream

formats

 Understanding the configuration

 Starting Windows Media Encoder

 Understanding hardware and

installation requirements

Windows Media Encoder Overview

 Encodes audio and video content into an ASF(Advance Streaming format) stream that can be delivered to a Windows Media server or written to an ASF file.  The output from Windows Media Encoder is a stream of information that can be heard or viewed with Microsoft Windows Media Player, or sent to a Windows Media server for multicasting, unicasting, or storage.  Used to create an ASD (Descriptor of ASF file) file that contains information about the media types, codecs, and bandwidth setting used to create an ASF stream; this information is referred to as the stream format

Hardware and Installation

Requirements

 An audio or video card  The Windows Media Encoder QuickStart Wizard is designed to create encoder configurations that receive live input through an audio or video card  To take input from audio or video files stored on a computer, use the template with Input/Output (I/O) options, or design a custom configuration.

The TSFs contain information on the

following parameters:

 Target network bandwidth:

• This value identifies the minimum bandwidth of the user’s network connection
• Windows Media TSFs range in bandwidth from 16 kilobits per second(Kbps) to 3 megabits per second (Mbps)  Content type: - has a great impact on the audio and video codecs used and the video settings that provide optimal performance.
• There are a variety Windows Media TSFs for audio only streams as well as multimedia streaming templates.

Continue

 Multiple bit rate video:

- use multiple bit rate video to encode

multiple video bands into a single ASF

stream or file so that the content can

stream over variable network bandwidths

• When encoding multiple bit rate video at

Internet bandwidths the minimum

processor required is a Pentium II 266

MHz

• To encode multiple bit rate video for

higher bandwidths a dual Pentium II 400

MHz is required.

Understanding Windows Media Encoder

configuration

 Determines all the settings Windows Media Encoder uses to create an ASF stream  To make the configuration process easier, Windows Media Encoder comes with several template stream formats (TSFs) that are modeled after possible network scenarios  Use the template stream formats to begin creating your own ASD files either through the QuickStart configuration wizard, or through Template with I/O Options wizard.  Template stream formats are used throughout Windows Media Technologies to identify the specifics of a content stream to the Windows Media component services and Windows Media Player clients.

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 The Windows Media Encoder template stream formats are designed for:

1. Audio-only content over the Internet. 2.Video with audio content over the Internet.
2. Multiple bit rate video with audio content over the Internet.
3. Video with audio content over an intranet.

To configure and start Windows Media Encoder using a template

1.In the Welcome window, select Template

with Input/Output Options, and click OK.

2.In the Compression and Formats screen

choose a template stream format for this

session.

3.In the Input Settings, Input Source screen,

select either Live Source or AVI/WAV/MP

File.

4.In the Output Settings, Output Options

screen, select where the ASF stream is to

be sent.

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5.If you are sending the content to a Windows Media server, in the Output Settings, Transmission screen, select the method that Windows Media Encoder uses to transmit the ASF stream to the Windows Media server. 6.If you are sending the content to a local ASF file, enter a file name for the ASF file in the Output settings, Output File screen. You also can limit the ASF file by file size and encoding duration. 7.Click Finish. The Windows Media Encoder Start window appears. On the Encode menu, click Start. Windows Media Encoder starts encoding the ASF stream.  8.On the File menu, click Save or Save as, and type in a file name to save the configuration to an ASD file.

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7.If you output to a Windows Media server, from the Output Settings, Transmission screen, select the method that Windows Media Encoder uses to transmit the ASF stream to the WindowsMedia server. 8.If you output to a local ASF file, in the Output Settings, Output File screen specify a file name for the output file. You also can limit the ASF file by file size and encoding duration. By selecting the Automatic Indexing check box, you can index your ASF file so that users can fast-forward and rewind while viewing the file. 9.On the File menu, click Save or Save as, and type in a file name to save the ASD file. If you are sending this stream to a Windows Media server, make sure to provide this ASD file to your Windows Media system administrator. 10.Click Finish to move to the Start window. On the Encode menu, click Start. Windows Media Encoder begins encoding the ASF stream.

To test Windows Media Encoder

1.In the Start window, note the information under

Connections. It must contain the reference for the

stream. Record the Media Stream Broadcast

Distribution (MSBD) reference.

2.On the Encode menu, click Start.

3.On another computer on the same network,

start Microsoft Windows Media Player.

4.On the File menu in Windows Media Player,

click Open.

5.In the Open dialog box, type the stream

reference from Windows Media Encoder.

Selecting Windows Media Encoder configuration methods

 Before you can start encoding with Windows

Media Encoder, you must configure it to

stream live information to a Windows Media

server and/or create an .asf file.

 After you open the encoder, you then either

open an existing configuration file (an .asd

file), or create a new configuration. The first

time you open Windows Media Encoder, the

Welcome window appears.

 This window provides three configuration

methods to choose from:

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 QuickStart. Microsoft recommends that you use QuickStart for the easiest configuration possible. The QuickStart wizard utilizes a set of template stream formats (TSFs) based on the type of content you want to deliver.  Template with I/O (Input/Output) options. If you have existing content that you want to use, the customizable template is a good choice. It allows you to specify the input and output files instead of using your default settings.  Customized configuration. Advanced users can customize the encoding to the exact parameters they need.