Moderate to excellent, considering this is a compression algorithm, varies according to level selected. See ASF for link to pages covering licensing of Windows Media and the Advanced Systems Format.ĭepends upon algorithms and tools to read will require sophistication to build tools. Generally used in files that represent a final-state format for end-user delivery. Comments on the best way to elucidate this topic are welcome. At this Library of Congress Web site, the VC-1 connection is highlighted in the description of WMV9, the fundamental Windows Media video codec. At the same time, a number of profiles and levels were established for example, see the Wikipedia VC-1 article and this Microsoft information page (link available through Internet Archive). During 2006, however, SMPTE finalized the VC-1 standard (421M), thus placing the Microsoft video codec family more in the mainstream. During 2005, the Microsoft Web site stopped referring to a "professional" codec and instead began promoting an Advanced Profile with features tailored to high definition video content (see Notes below). This format description seems to have been overtaken by events. Video bitstream produced by the Windows Media 9 professional video codec.
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