So basiclly I read this, http://www.gdcl.co.uk/2011/June/UnregisteredFilters.htm.
Which tells you how to use filters without registering them. There are two methods, new and using a private CoCreateInstance. Im trying to use the CoCreateInstance method.
In the sample from the site the code is listed as,
IUnknownPtr pUnk;
HRESULT hr = CreateObjectFromPath(TEXT("c:\\path\\to\\myfilter.dll"), IID_MyFilter, &pUnk);
if (SUCCEEDED(hr))
{
IBaseFilterPtr pFilter = pUnk;
pGraph->AddFilter(pFilter, L"Private Filter");
pGraph->RenderFile(pMediaClip, NULL);
}
My code as follows,
IUnknownPtr pUnk;
HRESULT hr = CreateObjectFromPath(TEXT("c:\\filters\\mp4demux.dll"), IID_BaseFilter, &pUnk);
if (SUCCEEDED(hr))
{
//add functionality
}
I'm guessing IID_BaseFilter is what Im supposed to use, its what I use for other filters. But I'm given the error 'ClassFactory cannot supply requested class'.
Am I missing something here? Any help would be greatly appreciated. Thanks in advance!
EDIT: code
IBaseFilter *pSrc = NULL, *pSrc2 = NULL, *pWaveDest = NULL, *pWriter = NULL;
IFileSinkFilter *pSink= NULL;
IGraphBuilder *pGraph;
ICaptureGraphBuilder2 *pBuild;
IMediaControl *pControl = NULL;
// This example omits error handling.
hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL, CLSCTX_INPROC_SERVER,
IID_ICaptureGraphBuilder2, (void**)&pBuild);
hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void**)&pGraph);
//Initialize the Capture Graph Builder
hr = pBuild->SetFiltergraph(pGraph);
// Not shown: Use the System Device Enumerator to create the
// audio capture filter.
hr = pMoniker->BindToObject(0, 0, IID_IBaseFilter, (void**)&pSrc);
hr = pGraph->AddFilter(pSrc, L"VideooCap");
hr = pMoniker2->BindToObject(0, 0, IID_IBaseFilter, (void**)&pSrc2);
hr = pGraph->AddFilter(pSrc2, L"AudioCap");
IBaseFilter *pMux;
//IFileSinkFilter *pSink;
hr = pBuild->SetOutputFileName(
&MEDIASUBTYPE_Avi, // Specifies AVI for the target file.
L"C:\\wav\\Example2.mp4", // File name.
&pMux, // Receives a pointer to the mux.
NULL); // (Optional) Receives a pointer to the file sink.
IUnknownPtr pUnk;
//static CLSID const clsid = { 0x025BE2E4, 0x1787, 0x4DA4, { 0xA5,0x85,0xC5,0xB2,0xB9,0xEE,0xB5,0x7C } };
static CLSID const clsid = { 0x5FD85181, 0xE542, 0x4e52, { 0x8D,0x9D,0x5D,0x61,0x3C,0x30,0x13,0x1B } };
//5FD85181-E542-4e52-8D9D5D613C30131B
HRESULT hr = CreateObjectFromPath(TEXT("c:\\filters\\mp4mux.dll"), clsid, &pUnk);
if (SUCCEEDED(hr))
{
IBaseFilterPtr pFilter = pUnk;
HRESULT hr = pGraph->AddFilter(pFilter, L"Private Filter");
}
hr = pBuild->RenderStream(
NULL,//NULL,//&PIN_CATEGORY_CAPTURE, // Pin category.
NULL,//&MEDIATYPE_Interleaved,//NULL,//&MEDIATYPE_Audio, // Media type.
pSrc, // Capture filter.
NULL, // Intermediate filter (optional).
pMux); // Mux or file sink filter.
hr = pBuild->RenderStream(
NULL,//NULL,//&PIN_CATEGORY_CAPTURE, // Pin category.
NULL,//&MEDIATYPE_Interleaved,//NULL,//&MEDIATYPE_Audio, // Media type.
pSrc2, // Capture filter.
NULL, // Intermediate filter (optional).
pMux); // Mux or file sink filter.
IMediaControl *pMC = NULL;
hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pMC);
printf("START");
hr = pMC->Run();
Sleep(4000);
hr = pMC->Stop();
printf("END");
CoUninitialize();
}
}
You should re-read Using Filters Without Registration. The second parameter is
CLSID
, the class identifier, not interface identifier (IBaseFilter
).For the GDCL MPEG-4 Demultiplexer, it is like this: