Programming with LEADTOOLS Multimedia > How To > DVR > How to Play a UDP MPEG2 Stream with DVR Buffer Capturing (C++)

How to Play a UDP MPEG2 Stream with DVR Buffer Capturing (C++)

The following C++ method demonstrates how to use the ltmmPlayControl to play a UDP MPEG2 source stream with modified DVR buffer settings:

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codeContainer Generic">void PlayUDPSourceWithDVRBuffer(IltmmPlay *pPlay)   USES_CONVERSION;  try  {  // Open the UDP Stream, but do not auto start  pPlay->put_AutoStart(VARIANT_FALSE);  pPlay->put_SourceFile(L"udp://127.0.0.1:9005");  IUnknown *punk = NULL;  HRESULT hr = pPlay->GetSubObject(ltmmPlay_Object_SourceFilter, &punk);  if (SUCCEEDED(hr))  {  ILMDVRSink *pDvrSink;  hr = punk->QueryInterface(IID_ILMDVRSink, (LPVOID*)&pDvrSink);  punk->Release();  if (SUCCEEDED(hr))  {  // Tell the DVR Sink that settings are about to change  pDvrSink->StartChangingAttributes();  // Set only one DVR buffer folder  pDvrSink->put_FolderCount(1);  // Set the buffer base file name to 'Capture.LBL'  pDvrSink->put_BaseName(TEXT("Capture.LBL"));  // Set the buffer folder location to 'C:\Temp'  pDvrSink->put_FolderName(0, TEXT("C:\\Temp"));  // Set the buffer folder to have 5 buffer data files, each at 100MB max size  pDvrSink->SetBufferSize(0, 5, 102400000);  // Commit the changed settings now  pDvrSink->StopChangingAttributes(VARIANT_FALSE);  // release the dvr sink object  pDvrSink->Release();  }  }  // Run the stream  pPlay->Run();  }  catch ( ... )  {  ASSERT(FALSE);  throw;  }