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IWMEncSourceGroup.AutoSetFileSource

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The AutoSetFileSource method automatically parses a multimedia file and adds up to one audio and one video stream from that file to the source group.

Syntax

void IWMEncSourceGroup.AutoSetFileSource(
  string  bstrFileName
);

Parameters

bstrFileName

[in]  String specifying the file name and path.

Return Values

If this method fails, it returns an error number.

Number Description
0x80070057 The string identifying the file name is NULL.
0xC00D0011 This method cannot be called if the encoder engine is running.

Example Code

using WMEncoderLib;

try
{
// Create a WMEncoder object.
WMEncoder Encoder;
Encoder = new WMEncoder();

// Declare objects and variables.
IWMEncSourceGroupCollection SrcGrpColl;
IWMEncSourceGroup SrcGrp;
IWMEncSource SrcAud;
IWMEncVideoSource SrcVid;
IWMEncProfileCollection ProColl;
IWMEncProfile Pro;
int i;
int iAudCount;
int iVidCount;


// Create an IWMEncSourceGroupCollection object.
SrcGrpColl = Encoder.SourceGroupCollection;

// Create an IWMEncSourceGroup object.
SrcGrp = SrcGrpColl.Add("SG_1");

// Create an audio and a video source object.
SrcAud = SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_AUDIO);
SrcVid = (IWMEncVideoSource)SrcGrp.AddSource(WMENC_SOURCE_TYPE.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.

ProColl = Encoder.ProfileCollection;
for (i = 0; i < ProColl.Count; i++)
{
    Pro = ProColl.Item(i);
    if (Pro.Name == "Windows Media Video 8 for Local Area Network (384 Kbps)")
    {
        SrcGrp.set_Profile(Pro);
        break;
    }
}

// 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.get_SourceCount(WMENC_SOURCE_TYPE.WMENC_AUDIO);
iVidCount = SrcGrp.get_SourceCount(WMENC_SOURCE_TYPE.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)
{
    SrcGrp.RemoveSource(WMENC_SOURCE_TYPE.WMENC_VIDEO, 0);
}

// Specify automatic archiving when the source group
// is active.
SrcGrp.set_AutoArchive(WMENC_ARCHIVE_TYPE.WMENC_ARCHIVE_LOCAL, WMENC_ARCHIVE_OPERATION.WMENC_ARCHIVE_START);

// Start the encoding process.
SrcGrp.PrepareToEncode(true);
}

catch (Exception e)
{
     // TODO: Handle exceptions.
}

Requirements

Reference: Windows Media Encoder

Namespace: WMEncoderLib

Assembly: Interop.WMEncoderLib.dll

Library: WMEncoderLib.dll

See Also