IMFPresentationDescriptor::GetStreamDescriptorCount method (mfidl.h)

Retrieves the number of stream descriptors in the presentation. Each stream descriptor contains information about one stream in the media source. To retrieve a stream descriptor, call the IMFPresentationDescriptor::GetStreamDescriptorByIndex method.


HRESULT GetStreamDescriptorCount(
  [out] DWORD *pdwDescriptorCount


[out] pdwDescriptorCount

Receives the number of stream descriptors.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.


This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:

  • Windows XP with Service Pack 2 (SP2) and later.
  • Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (October 2006 Update Rollup for Windows XP Media Center Edition) installed.


Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header mfidl.h
Library Mfuuid.lib

See also


Presentation Descriptors