MoCopyMediaType function (dmort.h)

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The MoCopyMediaType function copies the members of one media type structure into another media type structure.

Syntax

HRESULT MoCopyMediaType(
  DMO_MEDIA_TYPE       *pmtDest,
  const DMO_MEDIA_TYPE *pmtSrc
);

Parameters

pmtDest

Pointer to the target DMO_MEDIA_TYPE structure. The caller must allocate, but not initialize, this structure.

pmtSrc

Pointer to the source DMO_MEDIA_TYPE structure.

Return value

Returns an HRESULT value. Possible values include the following.

Remarks

This function copies all the members of pmtSrc to pmtDest and copies the format block. The caller must free the target media type by calling the MoFreeMediaType function.

Requirements