MFCreateSourceReaderFromMediaSource function (mfreadwrite.h)

Creates the source reader from a media source.


HRESULT MFCreateSourceReaderFromMediaSource(
  [in]  IMFMediaSource  *pMediaSource,
  [in]  IMFAttributes   *pAttributes,
  [out] IMFSourceReader **ppSourceReader


[in] pMediaSource

A pointer to the IMFMediaSource interface of a media source.

[in] pAttributes

Pointer to the IMFAttributes interface. You can use this parameter to configure the source reader. For more information, see Source Reader Attributes. This parameter can be NULL.

[out] ppSourceReader

Receives a pointer to the IMFSourceReader interface. The caller must release the interface.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code Description
The method succeeded.
The source contains protected content.


Call CoInitialize(Ex) and MFStartup before calling this function.

By default, when the application releases the source reader, the source reader shuts down the media source by calling IMFMediaSource::Shutdown on the media source. At that point, the application can no longer use the media source.

To change this default behavior, set the MF_SOURCE_READER_DISCONNECT_MEDIASOURCE_ON_SHUTDOWN attribute in the pAttributes parameter. If this attribute is TRUE, the application is responsible for shutting down the media source.

When using the Source Reader, do not call any of the following methods on the media source:

This function is available on Windows Vista if Platform Update Supplement for Windows Vista is installed.


Minimum supported client Windows 7, Windows Vista and Platform Update Supplement for Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 R2 [desktop apps | UWP apps]
Target Platform Windows
Header mfreadwrite.h
Library Mfreadwrite.lib
DLL Mfreadwrite.dll

See also

Media Foundation Functions

Source Reader