IWMSBroadcastPublishingPoint.AnnouncementStreamFormats (C#)

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IWMSBroadcastPublishingPoint.AnnouncementStreamFormats (C#)

The AnnouncementStreamFormats property retrieves an IWMSAnnouncementStreamFormats object containing a collection of names of media files whose formats are used in a multicast broadcast.

  • Note   This property is available only on Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; and Windows Server 2008.

Syntax

  IWMSAnnouncementStreamFormats = IWMSBroadcastPublishingPoint.AnnouncementStreamFormats;

Property Value

An IWMSAnnouncementStreamFormats object.

If this property fails, it throws an exception.

Number Description
0xC00D1459L This feature is not supported on this operating system.
0xC00D145AL The publishing point has already been removed.

Remarks

The IWMSAnnouncementStreamFormats object contains a collection of names of media files whose formats are used in a multicast broadcast. A format consists of the codecs, frame size, bit rates, and so on, specified in the file header. One file per format must be specified. For example, if you are broadcasting two files that were created using one format and five files created by using another format, only two file names are added to the IWMSAnnouncementStreamFormats object, one to represent each format. When a file name is added to the collection, the associated file is parsed to extract the format information that a player must use to receive and render the content. The IWMSBroadcastPublishingPoint.Announce method adds the parsed information to the multicast configuration for the publishing point.

Example Code

using Microsoft.WindowsMediaServices.Interop;
using System.Runtime.InteropServices;

// Declare variables.
WMSServer                       Server;
IWMSAnnouncementStreamFormats   AnnounceStreamFormats;
IWMSBroadcastPublishingPoint    BCPubPoint;
IWMSPublishingPoints            PubPoints;
IWMSPublishingPoint             PubPoint;

string                          strFile;

try {
    // Create a new WMSServer object.
    Server = new WMSServerClass();

    // Retrieve the IWMSPublishingPoints object.
    PubPoints = Server.PublishingPoints;

    // Retrieve each publishing point and retrieve the
    // IWMSBroadcastPublishingPoint object.
    for (int i = 0; i < PubPoints.Count; i++)
    {
        PubPoint = PubPoints[i];

        if (PubPoint.Type == 
            WMS_PUBLISHING_POINT_TYPE.WMS_PUBLISHING_POINT_TYPE_BROADCAST)
        {
            BCPubPoint = (IWMSBroadcastPublishingPoint)PubPoint;

            // Retrieve the IWMSAnnouncementStreamFormats object.
            AnnounceStreamFormats = BCPubPoint.AnnouncementStreamFormats;

            // Add a file to the IWMSAnnoucementStreamFormats
            // object for multicast broadcasting.
            strFile = "file://c:\\wmpub\\wmroot\\welcome2.asf";
            AnnounceStreamFormats.Add(strFile);
            break;
        }
    }
}
catch (COMException comExc) {
    // TODO: Handle COM exceptions.
}
catch (Exception e) {
    // TODO: Handle exceptions.
}

Requirements

Reference: Add a reference to Microsoft.WindowsMediaServices.

Namespace: Microsoft.WindowsMediaServices.Interop.

Assembly: Microsoft.WindowsMediaServices.dll.

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003 family, Windows Server 2008 family.

See Also

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