LEAD AAC Encoder

The LEAD AAC Encoder is a DirectShow filter for compressing audio data using the AAC compression standard (ISO/IEC 13818-7). The AAC standard delivers high quality audio at lower bitrate compared to other audio encoding standards like ISO/MPEG Audio Layer-3; MP3.

This encoder offers both variable bitrate and constant bitrate. However, due to a limitation in the AVI multiplexer, the encoder offers constant bit rate only if it is connected to the AVI multiplexer.

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

Component	Description
Filter Interfaces	ILMAACEncoder, ILMMCommon
Interface ID	IID_ILMAACEncoder
Input Media Types	Type:
	MEDIATYPE_Audio
	Subtypes:
	MEDIASUBTYPE_PCM
Output Media Types	Type:
	MEDIATYPE_Audio
	Subtype:
	MEDIASUBTYPE_LAAC (LEAD proprietary)
	MEDIASUBTYPE_mp4a
	MEDIASUBTYPE_AAC (format tag = 0xFF)
Filter CLSID	CLSID_LMAACEncoder
Property Page CLSID	CLSID_LMAACEncoderPropertyPage
Executable	LEncAAC.dll (Win32), LEncAACx.dll (x64), DSKernel2.dll
Filter Category	CLSID_AudioCompressorCategory
Header	ILEncAAC.h

Comments

NOTE: Media types are defined in the LGuids.h header file.

This filter is included as part of the following modules:

LEAD H.264 Video Encoder Module
LEAD MPEG-4 Video Encoder Module

Platforms

Win32, x64.

LEAD AAC Encoder

Comments

Platforms

See Also