Listing video input device names

Sample code

The following sample code will display FriendlyName of each video input device. For example, if the first detected video capture device is a DV camera, this sample will display a MessageBox with the message, "Microsoft DV Camera and VCR".

#include <stdio.h>

#include <dshow.h>

int
main()
{
 ICreateDevEnum *pCreateDevEnum = NULL;
 IEnumMoniker *pEnumMoniker = NULL;
 IMoniker *pMoniker = NULL;
 ULONG nFetched = 0;

 // Initialize COM
 CoInitialize(NULL);

 // Create CreateDevEnum to list device
 CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, 
   IID_ICreateDevEnum, (PVOID *)&pCreateDevEnum);
    
 // Create EnumMoniker to list VideoInputDevice 
 pCreateDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory,
   &pEnumMoniker, 0);
 if (pEnumMoniker == NULL) {
   // this will be shown if there is no capture device
   printf("no device\n");
   return 0;
 }

 // reset EnumMoniker
 pEnumMoniker->Reset();

 // get each Moniker
 while (pEnumMoniker->Next(1, &pMoniker, &nFetched) == S_OK) {
   // get the device friendly name:
   IPropertyBag *pPropertyBag;
   TCHAR devname[128];

   // bind to IPropertyBag
   pMoniker->BindToStorage(0, 0, IID_IPropertyBag,
     (void **)&pPropertyBag);

   // container for Friendly name
   VARIANT varFriendlyName;
   varFriendlyName.vt = VT_BSTR;

   // get FriendlyName
   pPropertyBag->Read(L"FriendlyName", &varFriendlyName, 0);

   // copy FriendlyName
#ifdef UNICODE
   // for UNICODE
   _tcscpy(devname, varFriendlyName.bstrVal);
#else
   // not UNICODE
   WideCharToMultiByte(CP_ACP, 0,
     varFriendlyName.bstrVal, -1, devname, sizeof(devname), 0, 0);
#endif      

   // display result
   MessageBox(NULL, devname, "DEVICE NAME", MB_OK);

   // release
   VariantClear(&varFriendlyName);

   // release
   pMoniker->Release();
   pPropertyBag->Release();
 }

 // release
 pEnumMoniker->Release();
 pCreateDevEnum->Release();

 // finish COM
 CoUninitialize();

 return 0;
}

This sample only shows the FriendlyName. This can be used to display list of available capture devcies.