Windows Media Encoder Events Do Not Fire (282521)

RESOLUTION

• If the application is a console mode application and COM is initialized in Single Threaded Apartment (STA) mode (CoInitialize( NULL ) ), the application must pump messages after it starts encoding. To accomplish this, add the following code after you start the Encoder:

  hr = pEncoder->Start();
  
        // MsgLoop is necessary to receive messages
  	while (true)
  	{
  		sec++;
  		if(sec == 30)
  		      break;
  		else 
              {
                  while(PeekMessage(&msg,NULL,NULL,NULL,PM_REMOVE))
  	            {
  		            TranslateMessage(&msg);
  		            DispatchMessage(&msg);
  	            }
  			Sleep(1000);  // Sleep for 1 sec 
              }
  	}
  
        pEncoder->Stop();
  						

  -OR-
  
  
• If the application is a Windows-based application and COM is initialized in STA mode (CoInitialize( NULL ) ), add the following function and call before calling PrepareToEncode on the Encoder. This ensures that the Encoder has enough time to initialize.

  void EncoderInitialization()
  {
      // 
      // Allow encoder init
      // 
  	int sec = 0 ; 
  	MSG msg;
  	while (true)
  	{
  		sec++;
  		if(sec == 15)
  			break;
  		else 
  		{
  			while ( PeekMessage(&msg,NULL,NULL,NULL,PM_REMOVE) )
  			{
  				TranslateMessage(&msg);
  				DispatchMessage(&msg);
  			}
  			Sleep(500);
  		}
  	}
  }