c++ - Selecting a Capture Device Using the System Device Enumerator -


i tring use link: http://msdn.microsoft.com/en-us/library/dd377566%28v=vs.85%29.aspx, select capturing device.

works on visual studio, throws following error qt:

 test.obj : error lnk2005: _main defined in main.obj   test.obj : error lnk2019: unresolved external symbol __imp__cocreateinstance@20   referenced in function "long __cdecl enumeratedevices(struct _guid const &,struct ienummoniker * *)" (?enumeratedevices@@yajabu_guid@@papauienummoniker@@@z)   test.obj : error lnk2019: unresolved external symbol __imp__variantclear@4 referenced in function "void __cdecl displaydeviceinformation(struct ienummoniker *)" (?displaydeviceinformation@@yaxpauienummoniker@@@z)   test.obj : error lnk2019: unresolved external symbol __imp__variantinit@4 referenced in function "void __cdecl displaydeviceinformation(struct ienummoniker *)" (?displaydeviceinformation@@yaxpauienummoniker@@@z)  test.obj : error lnk2019: unresolved external symbol __imp__couninitialize@0 referenced in function _main test.obj : error lnk2019: unresolved external symbol __imp__coinitializeex@8 referenced in function _main

i'm using windows 7 & qt 5.0.2.

any appreciated thanks.

searching "cocreateinstance unresolved external" on google , using first link returned:

http://social.msdn.microsoft.com/forums/en-us/vcgeneral/thread/5fc032e1-86d8-43c7-870b-f10599000605/

i spotted third comment indicates link against "ole32.lib".

your reply comment above indicates "oleaut32.lib" required.

also make sure link against "strmiids.lib".

to sum up, required libraries are:

  • ole32.lib
  • oleaut32.lib
  • strmiids.lib

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