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2008-08-27T16:34:45.290
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This is best handled by DirectShow. DirectShow is currently a part of the platform SDK. <pre><code>HRESULT extractFriendlyName( IMoniker* pMk, std::wstring& str ) { assert( pMk != 0 ); IPropertyBag* pBag = 0; HRESULT hr = pMk->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag ); if( FAILED( hr ) || pBag == 0 ) { return hr; } VARIANT var; var.vt = VT_BSTR; hr = pBag->Read(L"FriendlyName", &var, NULL); if( SUCCEEDED( hr ) && var.bstrVal != 0 ) { str = reinterpret_cast<wchar_t*>( var.bstrVal ); SysFreeString(var.bstrVal); } pBag->Release(); return hr; } HRESULT enumerateDShowFilterList( const CLSID& category ) { HRESULT rval = S_OK; HRESULT hr; ICreateDevEnum* pCreateDevEnum = 0; // volatile, will be destroyed at the end hr = ::CoCreateInstance( CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, reinterpret_cast<void**>( &pCreateDevEnum ) ); assert( SUCCEEDED( hr ) && pCreateDevEnum != 0 ); if( FAILED( hr ) || pCreateDevEnum == 0 ) { return hr; } IEnumMoniker* pEm = 0; hr = pCreateDevEnum->CreateClassEnumerator( category, &pEm, 0 ); // If hr == S_FALSE, no error is occured. In this case pEm is NULL, because // a filter does not exist e.g no video capture devives are connected to // the computer or no codecs are installed. assert( SUCCEEDED( hr ) && ((hr == S_OK && pEm != 0 ) || hr == S_FALSE) ); if( FAILED( hr ) ) { pCreateDevEnum->Release(); return hr; } if( hr == S_OK && pEm != 0 ) // In this case pEm is != NULL { pEm->Reset(); ULONG cFetched; IMoniker* pM = 0; while( pEm->Next(1, &pM, &cFetched) == S_OK && pM != 0 ) { std::wstring str; if( SUCCEEDED( extractFriendlyName( pM, str ) ) { // str contains the friendly name of the filter // pM->BindToObject creates the filter std::wcout << str << std::endl; } pM->Release(); } pEm->Release(); } pCreateDevEnum->Release(); return rval; } </code></pre> The following call enumerates all video compressors to the console : <pre><code>enumerateDShowFilterList( CLSID_VideoCompressorCategory ); </code></pre> The MSDN page <a href="http://msdn.microsoft.com/en-us/library/ms783347(VS.85).aspx" rel="nofollow noreferrer">Filter Categories</a> lists all other 'official' categories. I hope that is a good starting point for you.
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1. This table or related slice is empty.
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1. POBest way to enumerate all available video codecs on Windows?
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1. PTAnswer
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1. This table or related slice is empty.
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1. USChristopher
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1. POBest way to enumerate all available video codecs on Windows?
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1. VO
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3. VO
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1. COI might add the following: http://msdn.microsoft.com/en-us/library/windows/desktop/dd375655(v=vs.85).aspx". At the bottom of the page it suggests that the category CLSID_LegacyAmFilterCategory would be the one containing DMOs accessible by DirectShow as audio decompressors and video decompressors.
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 USsboisse

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