A multimedia framework and API produced by Microsoft for software developers to perform various operations with media files. Most Windows video-related applications on Windows, such as Microsoft's Windows Media Player, use DirectShow to manage multimedia content.

LEAD Theora Encoder

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The LEAD Theora Encoder is a DirectShow encoder for compressing video data using Theora compression. Theora is an open video codec developed by the Xiph.org foundation aimed at offering a patent-free alternative to MPEG-4. The compression is comparable to MPEG-2, H.263, MPEG-4 and H.264 and, unlike these codecs, the Theora codec is free of patent fees.

For more information, you can go to http://www.xiph.org and http://theora.org.

The compression options for the LEAD Theora Encoder can be set manually through the encoder property page. They can also be set programmatically through the ILMTheoraEncoder interface.

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

Filter Interface(s)	ILMTheoraEncoder
Interface ID	IID_ILMTheoraEncoder
Input Media Types	Type: MEDIATYPE_Video Subtypes: MEDIASUBTYPE_RGB24 MEDIASUBTYPE_RGB32
Output Media Types	Type: MEDIATYPE_Video Subtype: MEDIASUBTYPE_LTHE
Filter CLSID	CLSID_LMTheoraEncoder
Property Page(s) CLSID	CLSID_LMTheoraEncoderProperty
Filter category	CLSID_VideoCompressorCategory
Executable	LEncTheora.dll, DSKernel2.dll
Header	ILEncTheora.h

Platforms

Win32, x64

LEAD Theora Encoder User Interface