SaveStillBitmap Method (ConvertCtrl)

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

Syntax

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

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

'Declaration
 
Public Overridable Sub SaveStillBitmap( _
   ByVal fileName As String, _
   ByVal format As StillFormatType, _
   ByVal quality As Integer, _
   ByVal flags As Integer, _
   ByVal timeOut As Integer _
)

'Usage
 
Dim instance As ConvertCtrl
Dim fileName As String
Dim format As StillFormatType
Dim quality As Integer
Dim flags As Integer
Dim timeOut As Integer
 
instance.SaveStillBitmap(fileName, format, quality, flags, timeOut)

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

 function Leadtools.Multimedia.ConvertCtrl.SaveStillBitmap( 
   fileName ,
   format ,
   quality ,
   flags ,
   timeOut 
)

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

Parameters

fileName: A string containing the name of the file to 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. For the StillFormatType.CMP file format only, you can use the StillQuality enumeration values.
flags: Reserved for future use. Pass 0.
timeOut: The timeout period in milliseconds. The method fails if it is not able to take a sample within the specified time period. Use –1 to wait indefinitely until a sample is captured.

Remarks

This method does not return until the timeout occurs or the sample is captured. To enable still image capture, call the EnableStillCapture method.

Example

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

Copy Code

Public _result As Boolean = False
      Public _form As ConvertCtrlForm = New ConvertCtrlForm()
      Public _convertctrl As ConvertCtrl = Nothing
      Public _bmpFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_SaveStillBitmap.bmp")
      Public Sub SaveStillBitmapExample()
         ' input and output file names
         Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi")
         Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_SaveStillBitmapExample.mpg")

         Try
            ' reference the convert control
            _convertctrl = _form.ConvertCtrl

            ' set a timer on the form to make the still bitmap
            _form.TestTimer.Interval = 5000
            AddHandler _form.TestTimer.Tick, AddressOf SaveStillBitmap_Helper

            ' enable still capture
            _convertctrl.EnableStillCapture = True

            ' set the time window limit for capture of stills (ms)
            _convertctrl.StillCaptureLimit = 100000

            ' set the compressor to DVVideo
            _convertctrl.VideoCompressors.DVVideo.Selected = True

            ' set the source and target files
            _convertctrl.SourceFile = inFile
            _convertctrl.TargetFile = outFile

            ' convert it now!
            _convertctrl.StartConvert()

            ' now start the test timer for the still capture
            _form.TestTimer.Start()
         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 _convertctrl.State = ConvertState.Running
            Application.DoEvents()
         Loop
      End Sub

      Public Sub SaveStillBitmap_Helper(ByVal sender As Object, ByVal e As EventArgs)
         ' cancel the timer
         _form.TestTimer.Stop()

         ' try to simulate an error condition
         _convertctrl.SaveStillBitmap(_bmpFile, StillFormatType.BMP, 0, 0, -1)

         ' check for the capture file and set the result
         If File.Exists(Path.Combine(Directory.GetCurrentDirectory(), _bmpFile)) Then
            _result = True
         End If
      End Sub

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 ConvertCtrlForm _form = new ConvertCtrlForm();
      public ConvertCtrl _convertctrl = null;
      public string _bmpFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_SaveStillBitmap.bmp");
      public void SaveStillBitmapExample()
      {
         // input and output file names
         string inFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_Source.avi");
         string outFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_SaveStillBitmapExample.mpg");

         try
         {
            // reference the convert control
            _convertctrl = _form.ConvertCtrl;

            // set a timer on the form to make the still bitmap
            _form.TestTimer.Interval = 5000;
            _form.TestTimer.Tick += new EventHandler(SaveStillBitmap_Helper);

            // enable still capture
            _convertctrl.EnableStillCapture = true;

            // set the time window limit for capture of stills (ms)
            _convertctrl.StillCaptureLimit = 100000;

            // set the compressor to DVVideo
            _convertctrl.VideoCompressors.DVVideo.Selected = true;

            // set the source and target files
            _convertctrl.SourceFile = inFile;
            _convertctrl.TargetFile = outFile;

            // convert it now!
            _convertctrl.StartConvert();

            // now start the test timer for the still capture
            _form.TestTimer.Start();
         }
         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 (_convertctrl.State == ConvertState.Running)
            Application.DoEvents();
      }

      public void SaveStillBitmap_Helper(object sender, EventArgs e)
      {
         // cancel the timer
         _form.TestTimer.Stop();

         // try to simulate an error condition
         _convertctrl.SaveStillBitmap(_bmpFile, StillFormatType.BMP, 0, 0, -1);

         // check for the capture file and set the result
         if (File.Exists(Path.Combine(Directory.GetCurrentDirectory(), _bmpFile)))
            _result = true;
      }

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

ConvertCtrl Class
ConvertCtrl Members