Microsoft KB Archive/247542

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Article ID: 247542

Article Last Modified on 11/7/2002


  • Microsoft Windows Media Services 4.0

This article was previously published under Q247542


When you create applications that modify or create attributes in Windows Media Audio (WMA) files using the IWMAudioInfo API, information in the file header may become corrupt, causing the stream to be unplayable.


The file size may be stored incorrectly, in a way that does not match the actual size of the file. As a result, the audio file does not play.


Microsoft has confirmed that this is a problem in Microsoft Windows Media SDK version 4.0.


To work around this issue, run the ASFCHECK tool against the file to reset the file header with the proper information.


Custom applications that may use the IWMAudioInfo API are used for adding special attributes to Windows Media Audio (WMA) files. Examples of these attributes are Artist, Title, Album, Year, Comments, and so on.

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