Advanced Systems Format
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Advanced Systems Format is Microsoft's proprietary digital audio/digital video container format, especially meant for streaming media. ASF is part of the Media Foundation framework. Wikipedia
Container for: Windows Media Audio, Windows Media Video, VC-1
Filename extension: asf.wma.wmv
Initial release: Proprietary: 16 September 1996; 27 years ago; Public: 26 February 1998; 26 years ago
Latest release: 01.20.03; December 2004; 19 years ago
Magic number: 30 26 B2 75 8E 66 CF 11 A6 D9 00 AA 00 62 CE 6C