This method determines the media type associated with the current connection of the pin. This method fails if the pin is unconnected.

HRESULT ConnectionMediaType(


  • pmt
    [out] Pointer to an AM_MEDIA_TYPE structure. If the pin is connected, the media type is returned. Otherwise, the structure is initialized to a default state in which all elements are 0, with the exception of lSampleSize, which is set to 1, and bFixedSizeSamples, which is set to TRUE.

Return Values

Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.

Value Description
E_FAIL Failure.
E_POINTER Null pointer argument.
E_INVALIDARG Invalid argument.
E_NOTIMPL Method is not supported.
S_OK or NOERROR Success.


The returned structure can contain an allocated format block and a reference-counted IUnknown interface pointer. These resources should be released by calling the FreeMediaType utility function.

This method is implemented in the base classes by CBasePin::ConnectionMediaType.


DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.

See Also

IPin Interface

Last updated on Wednesday, April 13, 2005

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