IWMEncSourceGroup.AddSource

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The AddSource method adds a media stream to the source group.

Syntax

IWMEncSource = IWMEncSourceGroup.AddSource(enumType)

Parameters

enumType

[in]  Member of a WMENC_SOURCE_TYPE enumeration type identifying the type of the media stream being added.

Return Values

This method returns an IWMEncSource object.

If this method fails, it returns an error number.

Number Description
0x8007000E Memory cannot be allocated.
0xC00D0011 This method cannot be called if the encoder engine is running.
0xC00D1B5B The input source type must be either audio, video, or script.

Remarks

Only one audio, one video, one HTML, and one script stream can be added to a source group.

Example Code

' Create a WMEncoder object.
Dim Encoder As WMEncoder
Set Encoder = New WMEncoder

' Declare objects and variables.
Dim SrcGrpColl As IWMEncSourceGroupCollection
Dim SrcGrp As IWMEncSourceGroup
Dim SrcAud As IWMEncSource
Dim SrcVid As IWMEncVideoSource
Dim ProColl As IWMEncProfileCollection
Dim Pro As IWMEncProfile
Dim i As Integer
Dim iAudCount As Integer
Dim iVidCount As Integer


' Create an IWMEncSourceGroupCollection object.
Set SrcGrpColl = Encoder.SourceGroupCollection

' Create an IWMEncSourceGroup object.
Set SrcGrp = SrcGrpColl.Add("SG_1")

' Create an audio and a video source object.
Set SrcAud = SrcGrp.AddSource(WMENC_AUDIO)
Set SrcVid = SrcGrp.AddSource(WMENC_VIDEO)

' Specify the .avi source file.
SrcAud.SetInput "C:\filename.avi"
SrcVid.SetInput "C:\filename.avi"

' You can also use the AutoSetFileSource property to
' automatically parse a file and add the source streams
' to the source group.
'
'    SrcGrp.AutoSetFileSource ("C:\filename.avi")

' Loop through the collection of system profiles to set
' a specific profile into the source group object.

Set ProColl = Encoder.ProfileCollection
For i = 0 To ProColl.Count - 1
    Set Pro = ProColl.Item(i)
    If Pro.Name = "Windows Media Video 8 for Local Area Network (384 Kbps)" Then
        SrcGrp.Profile = Pro
        Exit For
    End If
Next

' Change the name of the source group.
SrcGrp.Name = "Music Only"

' Retrieve the number of audio and video streams
' in the source group.
iAudCount = SrcGrp.SourceCount(WMENC_AUDIO)
iVidCount = SrcGrp.SourceCount(WMENC_VIDEO)

' Remove the video stream. In the current release of the
' Windows Media Encoder SDK, a source group can contain
' at most only one audio, one video, and one script stream.
' You must verify that the count is not 0 before deleting
' the source stream.
If iVidCount <> 0 Then
    SrcGrp.RemoveSource WMENC_VIDEO, 0
End If

' Specify automatic archiving when the source group
' is active.
SrcGrp.AutoArchive(WMENC_ARCHIVE_LOCAL) = WMENC_ARCHIVE_START

' Start the encoding process.
SrcGrp.PrepareToEncode True

Requirements

Reference: Windows Media Encoder

Library: wmenc.exe

See Also