LEAD Vorbis Encoder

The LEAD Vorbis Encoder is a DirectShow filter for compressing audio data using the Vorbis compression algorithm. Vorbis is a new audio compression method used to store digital music or any audio data. The compressed audio data can be stored inside AVI or Ogg files.

Compared to MP3 compressed audio files, Vorbis based compression produces audio files that maintain a higher sound quality and/or a smaller compressed size, depending on the needs of the user. For example, the user has the option of keeping his or her digital music collection at the same sound quality level as MP3, but requiring significantly less disk space. Or, a user can commit the same amount of storage (disk space) as the MP3 based files, however the digital music will have higher quality sound.

The compression options for the LEAD Vorbis encoder can be set manually through the encoder property page. The compression options can also be set programmatically using the ILMVorbisEncoder interface.

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

Filter Interfaces	ILMVorbisEncoder, ILMMCommon
Interface ID	IID_ILMVorbisEncoder
Input Media Types	Type: MEDIATYPE_Audio Subtypes: MEDIASUBTYPE_WAVE MEDIASUBTYPE_PCM
Output Media Types	Type: MEDIATYPE_Audio Subtype: MEDIASUBTYPE_Vorbis MEDIASUBTYPE_LEADVorbis (WAVEFORMATEX type with WAVE_FORMAT_LEADVORBIS for the format tag)
Filter CLSID	CLSID_LMVorbisEncoder
Property Page CLSID	CLSID_LMVorbisEncoderProperty
Executable	LEncVorbis.dll
Filter category	CLSID_AudioCompressorCategory
Header	ILEncVorbis.h

Platforms

Win32, x64