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Microsoft AC-3 Encoder

The Microsoft AC-3 Encoder filter encodes stereo PCM audio to a Dolby Digital bitstream.

Note  The Microsoft implementation of the Dolby Digital technology is restricted under terms of the Dolby Digital licensing program to use by Microsoft applications.

Note  This filter is not supported on IA-64-based platforms.

Filter Information
Filter Interfaces

IBaseFilter

Input Pin Media Types

MEDIATYPE_Audio, MEDIASUBTYPE_PCM

The input type must be 48-kHz stereo, 16 bits per sample.

Input Pin Interfaces

IMemInputPin

IPin

IQualityControl

Output Pin Media Types

MEDIATYPE_Audio, MEDIASUBTYPE_DOLBY_AC3

MEDIATYPE_Stream, MEDIASUBTYPE_DOLBY_AC3

Output Pin Interfaces

IMediaSeeking

IPin

IQualityControl

Filter CLSIDCLSID_CMSAC3Enc (declared in wmcodecdsp.h)
Executablemsac3enc.dll
Merit MERIT_DO_NOT_USE
Filter Category CLSID_LegacyAmFilterCategory

 

Remarks

This filter is not available for use by third-party applications.

Requirements

Minimum supported client

Windows Vista Home Premium, Windows Vista Ultimate, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Enterprise, Windows 7 Ultimate [desktop apps only]

Minimum supported server

None supported

Header

Wmcodecdsp.h

See also

DirectShow Filters

 

 

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