Output to a DV device

  1. Create an instance of the ltmmConvert class. This is accomplished using the Win32 CoCreateInstance function as follows:

C Source

IltmmConvert* pConvert;   
CoCreateInstance(&CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmConvert, (void**) &pConvert); 

C++ Source

IltmmConvert* pConvert;   
CoCreateInstance(CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, IID_IltmmConvert, (void**) &pConvert); 

  1. Set the source file as follows:

C Source

BSTR bstr;   
bstr = SysAllocString(L"c:\\Source.avi");   
IltmmConvert_put_SourceFile(pConvert, bstr);   
SysFreeString(bstr); 

C++ Source

BSTR bstr;   
bstr = SysAllocString(L"c:\\Source.avi");   
pConvert->put_SourceFile(bstr);    
SysFreeString(bstr); 

  1. Set the target type to DV as follows:

C Source

IltmmConvert_put_TargetFormat(pConvert, ltmmConvert_TargetFormat_dvsd); 

C++ Source

pConvert->put_TargetFormat(ltmmConvert_TargetFormat_dvsd); 

  1. Select the first available device as follows:

C Source

IltmmTargetDevices* targetdevices;   
IltmmConvert_get_TargetDevices(pConvert, &targetdevices);   
IltmmTargetDevices_put_Selection(targetdevices, 0);   
IUnknown_Release(targetdevices);  

C++ Source

IltmmTargetDevices* targetdevices;   
pConvert->get_TargetDevices(&targetdevices);   
targetdevices->put_Selection(0);   
targetdevices->Release(); 

  1. You should start converting. What you have on the tape will be overwritten now, so make sure you do not have a tape inside the DV device that you do not want to record over. This is demonstrated with the following code:

C Source

IltmmVCRControl* pVCR;   
IltmmConvert_get_TargetVCRControl(pConvert, &pVCR);   
IltmmVCRControl_Record(pVCR);   
IUnknown_Release(pVCR); 
IltmmConvert_StartConvert(pConvert); 

C++ Source

IltmmVCRControl* pVCR;   
pConvert->get_TargetVCRControl(&pVCR);   
pVCR->Record();   
pVCR->Release();   
pConvert->StartConvert(); 

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