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There are specific guidelines for the use of file name extensions for Windows Media metafiles. Windows Media metafile extensions are used to identify the different types of Windows Media files. A file name extension provides an Independent Software Vendor (ISV) with information about the rendering requirements of an application that uses a particular extension, and enables content authors to target general types of media players.
The file name extension guidelines are listed in the following table. It is recommended that a file's MIME type, located in the file header, be used for file-type identification.
File name extension | MIME type | File content |
.wma | audio/x-ms-wma | Windows Media file, with audio content only. Typically used to download and play files or to stream content. |
.wmv | video/x-ms-wmv | Windows Media file with audio and/or video content. Typically used to download and play files or to stream content. |
.asf | video/x-ms-asf | Legacy content. Typically used to download and play files or to stream content. May contain audio and/or video content. Typically used to download and play files or to stream content. |
.wm | video/x-ms-wm | Reserved |
.wax | audio/x-ms-wax | Metafiles that reference Windows Media files with the .asf, .wma or .wax file extensions. |
.wvx | video/x-ms-wvx | Metafiles that reference Windows Media files with the .wma, .wmv, .wvx or .wax file extensions. |
.asx | video/x-ms-asf | Metafiles that reference Windows Media files with the .wma, .wax, .wmv, .wvx, .asf, or .asx file extensions. |
.wmx | video/x-ms-wvx | Reserved |
Remarks
Scripting and digital rights management (DRM) must be supported by any application rendering Windows Media files.
See Also
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