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I have the CLSID of the property pages of an encoder. I retrieved this by querying the filter for IID_ISpecifyPropertyPages.

hr = pHauppaugeSienaEncoder->QueryInterface(IID_ISpecifyPropertyPages, (void **)&pProp);

I also have the array of IUnknown.

But how do I get access to the properties to be able to change the values? How can use these CLSIDs?

Stefan van den Akker
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Neha Mittal
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  • possible duplicate of [How to change Directshow filter properties C++](http://stackoverflow.com/questions/14050074/how-to-change-directshow-filter-properties-c) – Roman R. Nov 12 '14 at 15:29
  • Thank you Roman. Looks like I have to get the filter SDK. I am wondering if there is a workaround. – Neha Mittal Nov 13 '14 at 06:42
  • Sometimes there is a type library you can import (the DLL implementing the encoder filter) and it opens the interfaces you need. – Roman R. Nov 13 '14 at 06:57
  • I got the SDK, but it looks like they do not implement any interface like IAMVideoControl etc.. Instead I see in the .h that they are inheriting IDispatch. I have queried a lot of interfaces and all of them return the hr = E_NOINTERFACE. – Neha Mittal Nov 17 '14 at 13:10

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