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*Details: File format summary



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Name Advanced Systems Format
Other names ASF
Identifiers MIME:  application/
Apple Uniform Type Identifier:
PUID:  fmt/131
Classification Audio, Image (Raster), Video
Disclosure Full
Description The Advanced Systems Format is an extensible file format developed by Microsoft for storing multimedia data streams. It comprises a Header Object, which describes the properties of the data streams, a Data Object, which contains the actual data streams stored in Data Packets and, optionally, one or more Index Objects. ASF files can contain audio, video and still image data streams, and the format supports streaming across networks. ASF supports a variety of audio, video and still image compression types, although it is most widely used for storing Windows Media Audio and Video encoded data.
Orientation Binary
Byte order Little-endian (Intel)
Related file formats Has lower priority than Windows Media Audio  
Has lower priority than Windows Media Video  
Has lower priority than Windows Media Video 9 Advanced Profile (WVC1) (9 Advanced Profile (WVC1))
Is supertype of Windows Media Audio  
Is supertype of Windows Media Video  
Technical Environment  
Released 01 Nov 2004
Supported until  
Format Risk  
Developed by Microsoft Corporation
Supported by Microsoft Corporation
Source Digital Preservation Department / The National Archives
Source date 11 Mar 2005
Source description  
Last updated 02 Aug 2005
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