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:

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/LEncAACKrn.DLL (Win32), LEncAACx.dll/LEncAACKrnx.DLL (x64), DSKernel2.dll

Filter category

CLSID_AudioCompressorCategory

Header

ILEncAAC.h

Note: Media types are defined in the LGUIDs.h header file.

Platforms

Win32, x64

See Also

LEAD AAC Encoder User Interface

This filter is included as part of the following modules:

LEAD H.264 Video Encoder Module

LEAD MPEG-4 Video Encoder Module

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