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SaveStillBitmap Method (CaptureCtrl)

Summary

Saves a snapshot from the running stream to a file as a bitmap.

Syntax

C++

public virtual void SaveStillBitmap(  
   string fileName, 
   Leadtools.Mediafoundation.StillFormatType format, 
   int quality, 
   int flags, 
   int timeOut 
)

Public Overridable Sub SaveStillBitmap( _ 
   ByVal fileName As String, _ 
   ByVal format As Leadtools.Mediafoundation.StillFormatType, _ 
   ByVal quality As Integer, _ 
   ByVal flags As Integer, _ 
   ByVal timeOut As Integer _ 
)

public: 
virtual void SaveStillBitmap(  
   String^ fileName, 
   Leadtools.Mediafoundation.StillFormatType format, 
   int quality, 
   int flags, 
   int timeOut 
)

Parameters

fileName
A string containing the name of the file in which to save the bitmap.

format
A StillFormatType value that represents the output file format.

quality
Value that represents the compression quality. For a list of possible values, refer to Compression Quality Factors.

If the StillFormatType parameter is equal to StillFormatType.CMP, the StillQuality enumeration values can be used.

flags
Reserved for future use. Pass 0.

timeOut
The timeout period in milliseconds. The method will fail if it was not able to take a sample in the specified time. Use -1 to wait indefinitely until a sample is snapped.

Remarks

Saves a snapshot from the running stream to a file as a bitmap. This method blocks (does not return) until either the timeout occurs or the sample is snapped. The following methods can also be used to obtain still images:

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
public CaptureCtrl _capturectrl = null; 
 
public bool _result = false; 
 
public void SaveStillBitmapExample() 
{ 
   // reference the capture control 
   _capturectrl = _form.CaptureCtrl; 
 
   // output file 
   string jpgFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_SaveStillBitmap.jpg"); 
 
   try 
   { 
      // select a video capture device 
      if (_capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      _capturectrl.VideoDevices["USB"].Selected = true; 
 
      // start the capture 
      _capturectrl.StartCapture(CaptureMode.Still); 
 
      // save the still image to a jpeg file 
      _capturectrl.SaveStillBitmap(jpgFile, StillFormatType.JPEG444, (int)StillQuality.MC, 0, -1); 
 
      // stop the capture 
      _capturectrl.StopCapture(); 
 
      // check for the capture file and set the result 
      if (File.Exists(jpgFile)) 
         _result = true; 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _form As New CaptureCtrlForm() 
Public _capturectrl As CaptureCtrl = Nothing 
 
Public _result As Boolean = False 
 
Public Sub SaveStillBitmapExample() 
   ' reference the capture control 
   _capturectrl = _form.CaptureCtrl 
 
   ' output file 
   Dim jpgFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_SaveStillBitmap.jpg") 
 
   Try 
      ' select a video capture device 
      If _capturectrl.VideoDevices("USB") Is Nothing Then 
         Throw New Exception("No USB video device available") 
      End If 
 
      _capturectrl.VideoDevices("USB").Selected = True 
 
      ' start the capture 
      _capturectrl.StartCapture(CaptureMode.Still) 
 
      ' save the still image to a jpeg file 
      _capturectrl.SaveStillBitmap(jpgFile, StillFormatType.JPEG444, StillQuality.MC, 0, -1) 
 
      ' stop the capture 
      _capturectrl.StopCapture() 
 
      ' check for the capture file and set the result 
      If File.Exists(jpgFile) Then 
         _result = True 
      End If 
   Catch generatedExceptionName As Exception 
      _result = False 
   End Try 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media" 
End Class