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Feature requirements

The following table provides information about the Windows Media Encoder features that have specific Microsoft Windows Media Player, operating system, or codec requirements.

Feature Windows Media Player Operating
systems
Codecs
  6.4 7.1/Windows® XP Corona (code name)    
Interlaced output video     X Microsoft
Windows XP
Windows Media
Video 9
Nonsquare pixel output     X    
Multiple-resolution MBR content     X    
DRM support X X X    
Multichannel audio     X Microsoft
Windows XP
Windows Media
Audio Professional 9
High-resolution audio (24-bit, 96 kHz)1     X Microsoft
Windows XP
Windows Media
Audio Professional 9
Dynamic range control     X Microsoft
Windows XP
Windows Media
Audio Professional 9
CBR encoding (one- or two-pass) X X X   See the following
table
Quality-based VBR   X X   See the following
table
Bit rate-based VBR   X X   See the following
table
Peak bit rate-based VBR   X X   See the following
table

1  Earlier players or operating systems will render 16-bit, 48-kHz content

Note that content encoded with the version 9 codecs (except for the Windows Media Audio Standard 9 codec) is not supported in Windows Media Player version 6.4. For Windows Media Player version 7.1 and Windows Media Player for Windows XP, content encoded with any of the codecs requires users to download the codec before playback. Content encoded with the Windows Media Audio Standard 9 codec may have glitches or silence during playback in Windows Media Player version 6.4. For Windows Media Player version 7.1 and Windows Media Player for Windows XP, content encoded with the Windows Media Audio Standard 9 codec does not require a user to download the codec.

The following table lists the supported encoding methods for the codecs that are included with the encoder.

Codec One-pass CBR Two-pass CBR Quality-based VBR Bit rate-based VBR Peak bit rate-based VBR
Windows Media Audio Professional 9 Yes Yes Yes Yes Yes
Windows Media Audio Professional 9, lossless format No No Yes No No
Windows Media
Audio
Standard 9
Yes Yes Yes1 Yes1 Yes1
Windows Media
Audio Voice 9
Yes No No No No
Windows Media
Video 9
Yes Yes Yes Yes Yes
Windows Media
Video 8.1
Yes Yes Yes Yes Yes
Windows Media
Video 7
Yes Yes Yes Yes Yes
Windows Media
Screen 9
Yes No Yes No No

1  Some glitches or silence may occur during playback in Windows Media Player version 6.4.

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