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Codecs
The Microsoft® Windows Media™ Player control supports all of the major multimedia compression/decompression algorithms (codecs) in use today. The Windows Media Player control automatically detects which codec is needed to decompress incoming data. Because Windows Media Player is based on the extensible filter-based architecture of Microsoft® DirectShow®, it is easy to add support for new codecs as they are created. The Windows Media Player control also supports non-filter-based codecs, such as Audio Compression Manager (ACM) and Video Compression Manager (VCM).
Because the decompression takes place on the client computer, some codecs must reside on the client. In most cases, the Windows Media Player control .ocx file is packaged with the appropriate codecs into a .cab file before it is distributed to clients. Other codecs can be downloaded and installed after the Windows Media Player is installed.
For more information on this topic, consult Codecs in the Windows Media Services section of the Microsoft Web site.
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