Advanced Systems Format
Advanced Systems Format (formerly Advanced Streaming Format, Active Streaming Format) is Microsoft's proprietary digital audio/digital video container format, especially meant for streaming media. ASF is part of the Media Foundation framework.
This image illustrates the computer icons that Windows Vista displays for Advanced Systems Format, depending on the file name extension. From left to right, the icons correspond to .asf, .wma and .wmv files. | |
| Filename extension |
.asf .wma .wmv |
|---|---|
| Internet media type |
video/x-ms-asf, application/vnd.ms-asf |
| Type code | 'ASF_' |
| Uniform Type Identifier (UTI) | com.microsoft.advanced-systems-format |
| Magic number | 30 26 B2 75 8E 66 CF 11 A6 D9 00 AA 00 62 CE 6C |
| Developed by | Microsoft |
| Initial release | Proprietary: 16 September 1996 Public: 26 February 1998 |
| Latest release | 01.20.03 December 2004 |
| Type of format | Container format |
| Container for | Windows Media Audio, Windows Media Video, VC-1 |
| Open format? | Yes |
| Free format? | No |
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