Publishing Codecs for Windows Media Player
[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The WMPlugins website is no longer supported for publishing your codec and making it discoverable by Windows Media Player users. You can instead publish your codec on a website of your choosing.
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