SetMediaType Method (WMStreamConfig)

Sets the media type of the stream using a MediaType object.

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public void SetMediaType( 
   MediaType MediaType
)

'Declaration
 
Public Sub SetMediaType( _
   ByVal MediaType As MediaType _
)

'Usage
 
Dim instance As WMStreamConfig
Dim MediaType As MediaType
 
instance.SetMediaType(MediaType)

public void SetMediaType( 
   MediaType MediaType
)

 function Leadtools.Multimedia.WMStreamConfig.SetMediaType( 
   MediaType 
)

public:
void SetMediaType( 
   MediaType^ MediaType
)

Parameters

MediaType: A MediaType object containing the media type of the stream to set.

Remarks

Sets the media type of the stream using an MediaType object. For more information, refer to the Microsoft documentation for IWMMediaProps.SetMediaType.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Public _result As Boolean = False
      Public _form As CaptureCtrlForm = New CaptureCtrlForm()
      Public Sub StreamTypeExample()
         ' reference the capture control
         Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
         Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_Source.avi")

         Try
            ' reference the profile if available
            Dim CurrentProfile As WMProfile = capturectrl.WMProfile

            ' if we have a profile display the info
            If Not CurrentProfile Is Nothing Then
               MessageBox.Show(GetStreamInfo(CurrentProfile), "Stream Info", MessageBoxButtons.OK)
            End If
         Catch e1 As Exception
            _result = False
         End Try

         ' we'll loop on the state and pump messages for this example.
         ' but you should not need to if running from a Windows Forms application.
         Do While capturectrl.State = CaptureState.Running
            Application.DoEvents()
         Loop
      End Sub

      ' discovering streams 
      Private Function GetStreamInfo(ByVal Profile As WMProfile) As String
         Dim streamConfig As WMStreamConfig
         Dim streamInfo As String = String.Empty

         ' show all the information regarding the streams
         Dim i As Integer = 0
         Do While i < Profile.StreamCount - 1
            streamConfig = Profile.GetStream(0)
            streamInfo &= "[[ Stream " & (i + 1).ToString() & " ]]"

            ' get the major type of the stream
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " type: " & streamConfig.StreamType

            ' get Stream number
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " number: " & streamConfig.StreamNumber.ToString()

            ' get Stream name
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " name: " & streamConfig.StreamName

            ' get connection name
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " connection name: " & streamConfig.ConnectionName

            ' get Bitrate
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " bitrate: " & streamConfig.Bitrate.ToString()

            ' get the maximum latency (time in milliseconds) between stream reception and display
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " buffer window: " & streamConfig.BufferWindow.ToString()

            ' get the major type of the media in the stream
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " majortype: " & streamConfig.Type

            ' get the maximum key frame time interval (in 100-nano seconds) 
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " max keyframe spacing: " & streamConfig.MaxKeyFrameSpacing.ToString()

            ' get the Quality, range from 0 to 100
            ' where zero denotes maximum frame rate and 100 denotes maximum quality. 
            streamInfo &= Microsoft.VisualBasic.Constants.vbLf & " stream quality: "

            If streamConfig.Quality > -1 Then
               streamInfo &= streamConfig.Quality.ToString()
            Else
               streamInfo &= "(unknown)"
            End If
            i += 1
         Loop

         Return streamInfo
      End Function

Public NotInheritable Class LEAD_VARS
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media";
End Class

public bool _result = false;
      public CaptureCtrlForm _form = new CaptureCtrlForm();
      public void StreamTypeExample()
      {
         // reference the capture control
         CaptureCtrl capturectrl = _form.CaptureCtrl;
         string inFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_Source.avi");

         try
         {
            // reference the profile if available
            WMProfile CurrentProfile = capturectrl.WMProfile;

            // if we have a profile display the info
            if (CurrentProfile != null)
               MessageBox.Show(GetStreamInfo(CurrentProfile), "Stream Info", MessageBoxButtons.OK);
         }
         catch (Exception)
         {
            _result = false;
         }

         // we'll loop on the state and pump messages for this example.
         // but you should not need to if running from a Windows Forms application.
         while (capturectrl.State == CaptureState.Running)
            Application.DoEvents();
      }

      // discovering streams 
      private string GetStreamInfo(WMProfile Profile)
      {
         WMStreamConfig streamConfig;
         string streamInfo = string.Empty;

         // show all the information regarding the streams
         for (int i = 0; i < Profile.StreamCount -1; i++)
         {
            streamConfig = Profile.GetStream(0);
            streamInfo += "[[ Stream " + (i + 1).ToString() + " ]]";

            // get the major type of the stream
            streamInfo += "\n type: " + streamConfig.StreamType;

            // get Stream number
            streamInfo += "\n number: " + streamConfig.StreamNumber.ToString();

            // get Stream name
            streamInfo += "\n name: " + streamConfig.StreamName;

            // get connection name
            streamInfo += "\n connection name: " + streamConfig.ConnectionName;

            // get Bitrate
            streamInfo += "\n bitrate: " + streamConfig.Bitrate.ToString();

            // get the maximum latency (time in milliseconds) between stream reception and display
            streamInfo += "\n buffer window: " + streamConfig.BufferWindow.ToString();

            // get the major type of the media in the stream
            streamInfo += "\n majortype: " + streamConfig.Type;

            // get the maximum key frame time interval (in 100-nano seconds) 
            streamInfo += "\n max keyframe spacing: " + streamConfig.MaxKeyFrameSpacing.ToString();

            // get the Quality, range from 0 to 100
            // where zero denotes maximum frame rate and 100 denotes maximum quality. 
            streamInfo += "\n stream quality: ";

            if (streamConfig.Quality > -1)
               streamInfo += streamConfig.Quality.ToString();
            else
               streamInfo += "(unknown)";
         }

         return streamInfo;
      }

static class LEAD_VARS
{
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media";
}

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

WMStreamConfig Class
WMStreamConfig Members