IWMSBroadcastPublishingPoint.StartWithoutData (Visual Basic .NET)

The StartWithoutData method initializes the publishing point and sends multicast beacons that enable clients to connect to a multicast when no content is being streamed.

IWMSBroadcastPublishingPoint.StartWithoutData()

Arguments

This method takes no parameters.

Return Value

If this method succeeds, it does not return a value. If it fails, it returns an error number.

Number	Description
0x8007000E	The account that the WMS service is running under does not have access rights to the content requested.
0x00000002	The server was not able to find the file referenced by the Path property of the publishing point.
0x00000003	The server was not able to find the path referenced by the Path property of the publishing point.
0xC00D0006L	The destination server indicated in the path property exists, but the server was unable to establish a connection to the destination server.
0xC00D14B5L	The playlist that the server is attempting to stream does not reference any media streams or files.
0xC00D001AL	The server was not able to find the file referenced by the Path property of the publishing point.
0xC00D2EE8L	The server that the publishing point attempted to connect to does not support the requested action.
0xC00D14B6L	The playlist that the server is attempting to parse contains a syntax error.
0xC00D157FL	The server was not able to find a playlist parser plug-in to access the playlist referenced by the Path property of the publishing point.
0xC00D145AL	The publishing point has already been removed.
0xC00D157EL	The server was not able to find a data source plug-in to access the data referenced by the Path property of the publishing point.
0xC00D151EL	The version of the playlist that the server is attempting to stream is either not supported by the server or is invalid. Version information in a playlist is indicated by the <WSX> element.

Remarks

You can use this method to initialize the publishing point before starting it, thereby minimizing latency at the start of the broadcast. Multicast beacons are messages sent by the server that enable a client to remain connected to a multicast broadcast when the publishing point is not streaming content.

Example

Imports Microsoft.WindowsMediaServices.Interop
Imports System.Runtime.InteropServices

Private Sub BeginWOData()

    ' Declare variables.
    Dim Server As WMSServer
    Dim PubPoints As IWMSPublishingPoints
    Dim PubPoint As IWMSPublishingPoint
    Dim BCPubPoint As IWMSBroadcastPublishingPoint
    Dim i As Integer

Try
    ' Create the WMSServer object.
    Server = New WMSServer()

    ' Retrieve the IWMSPublishingPoints object.
    PubPoints = Server.PublishingPoints

    ' Retrieve each publishing point and retrieve the
    ' IWMSBroadcastPublishingPoint object.
    For i = 0 To Server.PublishingPoints.Count – 1

        PubPoint = PubPoints.Item(i)
        If PubPoint.Type = WMS_PUBLISHING_POINT_TYPE.WMS_PUBLISHING_POINT_TYPE_BROADCAST Then
            BCPubPoint = PubPoint
            Exit For
        End If
    Next i

    ' Initialize the publishing point.
    BCPubPoint.StartWithoutData()

Catch excCom As COMException
    ' TODO: Handle COM exceptions.
Catch exc As Exception
    ' TODO: Handle errors.
Finally
    ' TODO: Clean-up code goes here.
End Try

End Sub

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

Reference

IWMSBroadcastPublishingPoint Object (Visual Basic .NET)

IWMSBroadcastPublishingPoint.Start (Visual Basic .NET)