The following method for C++ shows how to get the DVR Sink object from the ltmmPlayControl object and use it to set DVR buffer location settings on physical disks C: and D:.
void SetDVRBufferSettings(IltmmPlay *pPlay)
{
IUnknown *punk = NULL;
HRESULT hr = pPlay->GetSubObject(ltmmPlay_Object_SourceFilter, &punk);
if(SUCCEEDED(hr) && NULL != punk)
{
ILMDVRSink *pDvrSink;
hr = punk->QueryInterface(IID_ILMDVRSink, (LPVOID*)&pDvrSink);
punk->Release();
if (SUCCEEDED(hr))
{
// Tell sink we are starting to change settings
pDvrSink->StartChangingAttributes();
// Set Two locations
pDvrSink->put_FolderCount(2);
pDvrSink->put_BaseName(TEXT("Capture.LBL"));
// Set folder 1 location
pDvrSink->put_FolderName(0, TEXT("C:\\Temp\\DVR"));
// Set folder 1 file count to 2, each set to 16MB max file size
pDvrSink->SetBufferSize(0, 2, 16384000);
// Set folder 2 location
pDvrSink->put_FolderName(0, TEXT("D:\\Temp\\DVR"));
// Set folder 2 file count to 4, each set to 8MB max file size
pDvrSink->SetBufferSize(1, 4, 8192000);
// Tell sink to apply the changes
pDvrSink->StopChangingAttributes(VARIANT_FALSE);
// Release interface and free strings
pDvrSink->Release();
}
}
}
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