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