LEAD Windows Media Reader

The LEAD Windows Media Reader is a DirectShow® source filter for parsing Windows Media Files. It is especially useful for playing Windows Media files under Vista from a URL.

This filter supports the standard IFileSourceFilter interface. Use the IFileSourceFilter::Load method to let the LEAD Windows Media Reader filter know where to read the data from. Please see the Microsoft documentation for this interface for more information.

The LEADTOOLS Multimedia toolkit will automatically use this filter (if it is available) to play Windows Media from a URL. This filter is required for playing Windows Media files from a URL under Vista because there is no alternate filter that would provide this functionality in Vista. There was a Windows Media Source filter provided by Microsoft with XP and earlier operating systems, but that filter has been discontinued starting with Vista.

This filter requires WMVCORE.DLL to be installed. If this library is missing, you will first get error code REGDB_E_CLASSNOTREG from DirectShow. LEADTOOLS will return LTMM_E_WMVCORE_MISSING on subsequent attempts to use this filter. To correct this, please install the Windows Media Player.

Technical details for the filter are provided in the following table:

Filter Interfaces

ILMWMReader, IFileSourceFilter

Interface ID

IID_ILMWMReader, IID_IFileSourceFilter

Input Media Types

N/A

Output Media Types

Type: MEDIATYPE_Video

Subtype:
MEDIASUBTYPE_YUY2
MEDIASUBTYPE_UYVY
MEDIASUBTYPE_YV12
MEDIASUBTYPE_YVYU
MEDIASUBTYPE_NV12
MEDIASUBTYPE_RGB24
MEDIASUBTYPE_RGB32
MEDIASUBTYPE_RGB565
MEDIASUBTYPE_RGB555
MEDIASUBTYPE_RGB8

Type: MEDIATYPE_Audio

Subtype:
MEDIASUBTYPE_PCM

Filter CLSID

CLSID_LMWMReader

Property Page CLSID

N/A

Executable

LMWMReader.dll, DSKernel2.dll

Filter category

CLSID_LegacyAmFilterCategory

Header

ILMWMReader.h

Platforms

Win32, x64

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