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SaveStillBitmap Method

Summary

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

Syntax

C++

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

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

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.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
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.WMV"); 
 
   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); 
 
      // select the target format 
      _convertctrl.TargetFormat = TargetFormatType.WMV; 
 
      // select video and audio target formats for the output 
      int index = -1; 
      TargetVideoFormats targetvideoformats = _convertctrl.TargetFormats[_convertctrl.TargetFormat].VideoFormats; 
      index = targetvideoformats.IndexOf("{33564D57-0000-0010-8000-00AA00389B71}");// Windows Media Video 9 (WMV) 
      targetvideoformats.Selection = index; 
      TargetAudioFormats targetaudioformats = _convertctrl.TargetFormats[_convertctrl.TargetFormat].AudioFormats; 
      index = targetaudioformats.IndexOf("{00000161-0000-0010-8000-00AA00389B71}");// Windows Media Audio (WMA) 
      targetaudioformats.Selection = index; 
 
      // 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:\LEADTOOLS21\Media"; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
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.wmv") 
 
   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 
 
      ' select WMV target format 
      _convertctrl.TargetFormat = TargetFormatType.WMV 
 
      ' select video and audio target formats for the output 
      Dim index As Integer = -1 
      Dim trgvideoformats As TargetVideoFormats = _convertctrl.TargetFormats(_convertctrl.TargetFormat).VideoFormats 
      index = trgvideoformats.IndexOf("{33564D57-0000-0010-8000-00AA00389B71}") ' Windows Media Video 9 (WMV) 
      trgvideoformats.Selection = index 
      Dim trgaudioformats As TargetAudioFormats = _convertctrl.TargetFormats(_convertctrl.TargetFormat).AudioFormats 
      index = trgaudioformats.IndexOf("{00000161-0000-0010-8000-00AA00389B71}") ' Windows Media Audio (WMA) 
      trgaudioformats.Selection = index 
 
      ' 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:\LEADTOOLS21\Media" 
End Class

Requirements

Target Platforms

Reference

ConvertCtrl Class

ConvertCtrl Members

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Help Version 21.0.2021.7.2

Leadtools.MediaFoundation Assembly

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Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies