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PauseCapture Method

Summary

Pauses the capture control.

Syntax

C++/CLI

public virtual void PauseCapture()

public: 
virtual void PauseCapture();

Remarks

Places the object in the CaptureState.Paused state. The object must be in the CaptureState.Pending or CaptureState.Running state prior to calling this method. To resume capturing, call the RunCapture method. If the method fails, an error is raised. For more information, refer to the Error Codes.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public bool _exit = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(false); 
 
public void KeyPressesExample() 
{ 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_KeyPressesExample.avi"); 
 
   try 
   { 
      // set a video device, use the name of your device here 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB capture device available"); 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
      // set an audio device, use the name of your device here 
      capturectrl.AudioDevices["USB"].Selected = true; 
 
      // enable preview 
      capturectrl.Preview = true; 
 
      // set the target output file 
      capturectrl.TargetFile = outFile; 
 
      // subscribe to the key events 
      capturectrl.KeyDown += KeyDown_Helper; 
      capturectrl.KeyUp += KeyUp_Helper; 
      capturectrl.KeyPress += KeyPress_Helper; 
 
      // capture it now! 
      capturectrl.StartCapture(CaptureMode.AutoFramesAndAudio); 
   } 
   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 (_exit == false) 
      Application.DoEvents(); 
 
   // clean up event handlers 
   capturectrl.KeyDown -= KeyDown_Helper; 
   capturectrl.KeyUp -= KeyUp_Helper; 
   capturectrl.KeyPress -= KeyPress_Helper; 
} 
 
void KeyPress_Helper(object sender, Leadtools.MediaFoundation.KeyPressEventArgs e) 
{ 
   switch ((char)e.keyAscii) 
   { 
      case 'p': 
         // toggle preview mode 
         _form.CaptureCtrl.TogglePreview(); 
         break; 
      case 'f': 
         // toggle full screen mode 
         _form.CaptureCtrl.ToggleFullScreenMode(); 
         break; 
      case 's': 
         // stop the capture and exit 
         _form.CaptureCtrl.StopCapture(); 
         _exit = true; 
         break; 
      case ' ': 
         // pause the capture or run if paused, this shows in the output file 
         if (_form.CaptureCtrl.State == CaptureState.Running || _form.CaptureCtrl.State == CaptureState.Pending) 
            _form.CaptureCtrl.PauseCapture(); 
         else if (_form.CaptureCtrl.State == CaptureState.Paused) 
            _form.CaptureCtrl.RunCapture(); 
         break; 
   } 
 
   // set result 
   _result = true; 
} 
 
void KeyUp_Helper(object sender, KeyUpEventArgs e) 
{ 
   // set result 
   _result = true; 
} 
 
public void KeyDown_Helper(object sender, KeyDownEventArgs e) 
{ 
   // set result 
   _result = true; 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS23\Media"; 
}

Requirements

Target Platforms

Reference

CaptureCtrl Class

CaptureCtrl Members

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Help Version 23.0.2024.2.29

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies