Sustainability of Digital Formats: Planning for Library of Congress Collections

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Windows Media Video File with WMV9 Professional Codec

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Format Description Properties Explanation of format description terms

Identification and description Explanation of format description terms

Full name Windows Media Video File with Windows Media 9 Professional Codec
Description File format based in ASF (Advanced Systems Format) that wraps a Windows Media 9 professional video bitstream.
Production phase Generally a final-state format for end-user delivery.
Relationship to other formats
    Subtype of WMV, Windows Media Video
    Contains WMV9_PRO, Windows Media 9 Professional Video Codec
    May contain WMA9, Windows Media 9 Audio Codec
    May contain WMA9_PRO, Windows Media 9 Professional Audio Codec

Local use Explanation of format description terms

LC experience or existing holdings  
LC preference See WMV.

Sustainability factors Explanation of format description terms

Disclosure See WMV and ASF.
    Documentation See WMV and ASF.
Adoption Not known to the compilers of this document.
    Licensing and patents See ASF for link to pages covering licensing of Windows Media and the Advanced Systems Format.
Transparency Depends upon algorithms and tools to read; will require sophistication to build tools.
Self-documentation See ASF
External dependencies See WMV
Technical protection considerations See ASF

Quality and functionality factors Explanation of format description terms

Moving Image
Normal rendering Good support.
Clarity (high image resolution) See WMV9_PRO
Functionality beyond normal rendering See WMV
Sound
Fidelity (high audio resolution) See WMV9_PRO
Multiple channels See WMV9_PRO

File type signifiers and format identifiers Explanation of format description terms

Tag Value Note
Filename extension See note.  See WMV
Internet Media Type See note.  See WMV
Magic numbers See note.  See WMV
ASF GUID See note.  See WMV

Notes Explanation of format description terms

General  
History  

Format specifications Explanation of format description terms


Useful references

URLs


Last Updated: Tuesday, 21-Feb-2017 09:34:57 EST