Event ID 351 — Multicast Streaming

Updated: November 17, 2007

Applies To: Windows Server 2008

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You can configure Multicast Streaming plug-ins in Windows Media Services to enable the multicast distribution of content. Multicast streaming is a one-to-many relationship between a Windows Media server and the clients receiving the stream. With a multicast stream, the server streams to a multicast IP address on the network, and all clients receive the same stream by subscribing to the IP address. Because there is only one stream from the server regardless of the number of clients receiving the stream, a multicast stream requires the same amount of bandwidth as a single unicast stream containing the same content. For more information, see Delivering content as a multicast stream.

Event Details

Product: Windows Media Services
ID: 351
Source: WMServer
Version: 9.5
Symbolic Name: WMS_EVMSG_MULTICAST_FORMAT_NOT_FOUND
Message: Stream format information could not be found for the multicast broadcast.

Resolve

Create a new multicast information file

Run the Multicast Announcement Wizard for the broadcast publishing point to create a new multicast information file.

To start the Multicast Announcement Wizard:

  1. On the Windows Media server, open Windows Media Services. To open Windows Media Services, click Start, point to Administrative Tools, and then click Windows Media Services.
  2. In the console tree, right-click the broadcast publishing point for the multicast content.
  3. In the details pane, click the Announce tab.
  4. In Connect to a multicast stream, click Run Multicast Announcement Wizard.

Note: For information about completing the wizard, see Working with the Multicast Announcement Wizard.

Verify

To verify that the multicast stream can be delivered to clients, test the stream by using Windows Media Player:

  1. If you want to test the stream by using Windows Media Player on the computer that is running Windows Media Services, you must install Desktop Experience. For more information, see Installing Desktop Experience.
  2. On the Windows Media server, open Windows Media Services. To open Windows Media Services, click Start, point to Administrative Tools, and then click Windows Media Services.
  3. In the console tree, click the broadcast publishing point that hosts the stream that you want to test.
  4. In the details pane, click the Announce tab.
  5. In the Connect to a multicast stream area, click Run Multicast Announcement Wizard to create a multicast information file (a file with an .nsc file name extension). This file contains information that the Player needs to decode and stream the multicast broadcast. For more information about completing the wizard, see Working with the Multicast Announcement Wizard.
  6. Use the announcement files created by the wizard to access the multicast broadcast in Windows Media Player. For more information, see Testing the announcement file.

Related Management Information

Multicast Streaming

Streaming Media Services

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