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SubTypeName Property

Summary

This property is updated with a string that represents the GUID of the source video type.

Syntax

C++

public string SubTypeName {get;}

Public ReadOnly Property SubTypeName As String

public: 
property String^ SubTypeName { 
   String^ get(); 
}

Property Value

A string that represents the GUID of the source video type.

Remarks

This property is one of the properties that gets updated by the VideoFormats indexer. This property updated with a string that represents the GUID of the source video type. For a list of video types, refer to the Media Subtypes section of Format Types, Media Types and Media Subtypes. The CaptureCtrl.VideoCaptureFormats property is updated with a VideoFormats object that contains all of the video formats available for the current capture device. The VideoFormats indexer obtains a VideoFormat object for each of the supported video formats. The VideoFormat properties of each VideoFormat object, obtained using the VideoFormats indexer, are updated with information about that specific video format. This information includes the following information:

SubTypeName
SubTypeFriendlyName
Height property
Width property
Compression
BitCount

The VideoFormat.SubTypeFriendlyName property is updated with the friendly name of the video format type.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
public bool _result = false; 
 
public void VideoFormatExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   int count, compression = 0, bits = 0, width = 0, height = 0; 
   int found, selected = -1; 
 
   // set a video device, use the name of your device here 
   if (capturectrl.VideoDevices["USB"] != null) 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
   // reference the videoformats property 
   VideoFormats videoformats = capturectrl.VideoCaptureFormats; 
 
   try 
   { 
      // get count of available video formats 
      count = videoformats.Count; 
 
      // enumerate formats and select one 
      foreach (VideoFormat vf in videoformats) 
      { 
         // get the properties 
         bits = vf.BitCount; 
         compression = vf.Compression; 
         width = vf.Width; 
         height = vf.Height; 
 
         // select the format if it matches some criteria 
         if (bits == 16 && width == 640 && height == 480) 
         { 
            vf.Selected = true; 
            break; 
         } 
      } 
 
      // get the currently selected format 
      selected = videoformats.Selection; 
 
      // find a format based on subtype name, width and height (YUY2 320 x 240 video) 
      found = videoformats.IndexOf(Constants.MEDIASUBTYPE_YUY2, 320, 240); 
 
      // our found format is not selected, so select it 
      if (found != selected) 
         videoformats.Selection = found; 
 
      // get the new selected format 
      selected = videoformats.Selection; 
 
      // set our result based on what we expect 
      _result = (count > 0 && selected == found); 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _form As CaptureCtrlForm = New CaptureCtrlForm() 
Public _result As Boolean = False 
 
Public Sub VideoFormatExample() 
   ' reference the capture control 
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
 
   Dim count As Integer, compression As Integer = 0, bits As Integer = 0, width As Integer = 0, height As Integer = 0 
   Dim found As Integer, selected As Integer = -1 
 
   ' set a video device, use the name of your device here 
   If Not capturectrl.VideoDevices("USB") Is Nothing Then 
      capturectrl.VideoDevices("USB").Selected = True 
   End If 
 
   ' reference the videoformats property 
   Dim videoformats As VideoFormats = capturectrl.VideoCaptureFormats 
 
   Try 
      ' get count of available video formats 
      count = videoformats.Count 
 
      ' enumerate formats and select one 
      For Each vf As VideoFormat In videoformats 
         ' get the properties 
         bits = vf.BitCount 
         compression = vf.Compression 
         width = vf.Width 
         height = vf.Height 
 
         ' select the format if it matches some criteria 
         If bits = 16 AndAlso width = 640 AndAlso height = 480 Then 
            vf.Selected = True 
            Exit For 
         End If 
      Next vf 
 
      ' get the currently selected format 
      selected = videoformats.Selection 
 
      ' find a format based on subtype name, width and height (YUY2 320 x 240 video) 
      found = videoformats.IndexOf(Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_YUY2, 320, 240) 
 
      ' our found format is not selected, so select it 
      If found <> selected Then 
         videoformats.Selection = found 
      End If 
 
      ' get the new selected format 
      selected = videoformats.Selection 
 
      ' set our result based on what we expect 
      _result = (count > 0 AndAlso selected = found) 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub

Requirements

Target Platforms

Reference

VideoFormat Class

VideoFormat Members

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Help Version 20.0.2020.4.2

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies