{
 "id": "asf",
 "name": "ASF",
 "category": "audio",
 "identifiers": {
  "extensions": [
   "asf"
  ],
  "mime": [
   "video/x-ms-asf",
   "application/vnd.ms-asf",
   "application/ms-asf",
   "application/x-mplayer2",
   "video/x-la-asf",
   "video/x-ms-asf-plugin"
  ],
  "puid": [
   "fmt/131"
  ],
  "wikidata": [
   "Q379741"
  ],
  "loc_fdd": [
   "fdd000067"
  ],
  "uti": [
   "com.microsoft.advanced-systems-format"
  ],
  "magic": [
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    "offset": 0,
    "hex": "3026b2758e66cf11a6d900aa0062ce6c",
    "notes": "File Formats Wiki"
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  ],
  "signatures": [
   {
    "name": "Advanced Systems Format",
    "sequences": [
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      "position": "bof",
      "offset": 0,
      "pattern": "3026b2758e66cf11a6d900aa0062ce6c{12}0102"
     }
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 },
 "status": "writable",
 "summary": "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.",
 "tools": [
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   "name": "Adobe Premiere Pro",
   "url": "http://adobe.com/products/premiere",
   "reads": true,
   "writes": false,
   "license": "proprietary license"
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  {
   "name": "ExifTool",
   "url": "https://exiftool.org/",
   "reads": true,
   "writes": false,
   "license": "Artistic License / GNU General Public License, version 1.0 or later",
   "open_source": true
  },
  {
   "name": "EZ CD Audio Converter",
   "url": "https://www.poikosoft.com/",
   "reads": true,
   "writes": false
  },
  {
   "name": "GStreamer",
   "url": "https://gstreamer.freedesktop.org/",
   "reads": true,
   "writes": false,
   "license": "GNU Library General Public License, version 2.0 or later",
   "open_source": true
  },
  {
   "name": "IrfanView",
   "url": "https://www.irfanview.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
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  {
   "name": "Media Player (Windows 11)",
   "url": "https://www.wikidata.org/wiki/Q109616196",
   "reads": true,
   "writes": false
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   "name": "Microsoft Photos",
   "url": "https://www.wikidata.org/wiki/Q26328552",
   "reads": true,
   "writes": false,
   "license": "Microsoft end-user license agreement"
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  {
   "name": "Microsoft PowerPoint 2011",
   "url": "https://www.wikidata.org/wiki/Q28018630",
   "reads": true,
   "writes": false
  },
  {
   "name": "Microsoft PowerPoint 2013",
   "url": "https://www.wikidata.org/wiki/Q28018622",
   "reads": true,
   "writes": false
  },
  {
   "name": "Microsoft PowerPoint 2016",
   "url": "https://www.wikidata.org/wiki/Q28018608",
   "reads": true,
   "writes": false
  },
  {
   "name": "Movavi Video Editor",
   "url": "https://www.movavi.com/videoeditor/",
   "reads": true,
   "writes": false,
   "license": "proprietary license"
  },
  {
   "name": "MoviePlus",
   "url": "http://www.serif.com/movieplus",
   "reads": true,
   "writes": false
  },
  {
   "name": "mutagen",
   "url": "https://mutagen.readthedocs.io/en/latest/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "PhotoRec",
   "url": "http://www.cgsecurity.org/wiki/PhotoRec",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "Q847465",
   "url": "https://ffmpeg.org",
   "reads": true,
   "writes": true,
   "license": "GNU Lesser General Public License, version 2.1 or later",
   "open_source": true
  },
  {
   "name": "Strawberry",
   "url": "https://www.strawberrymusicplayer.org/",
   "reads": true,
   "writes": false
  },
  {
   "name": "VLC media player",
   "url": "https://www.videolan.org/vlc/",
   "reads": true,
   "writes": false,
   "license": "GNU Lesser General Public License, version 2.1 or later",
   "open_source": true
  },
  {
   "name": "Windows Media Player, version 10",
   "url": "http://www.microsoft.com/windows/windowsmedia/player/10/default.aspx",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 11",
   "url": "http://www.microsoft.com/windows/windowsmedia/player/11/default.aspx",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 12",
   "url": "https://www.wikidata.org/wiki/Q28018460",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 6.4",
   "url": "https://www.wikidata.org/wiki/Q139790984",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 7",
   "url": "https://www.wikidata.org/wiki/Q139792281",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 8",
   "url": "https://www.wikidata.org/wiki/Q139792269",
   "reads": true,
   "writes": false
  },
  {
   "name": "Windows Media Player, version 9",
   "url": "https://www.wikidata.org/wiki/Q28018572",
   "reads": true,
   "writes": false
  },
  {
   "name": "xine",
   "url": "https://xine.sourceforge.net/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/ASF",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/131",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/131",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q379741",
   "url": "https://www.wikidata.org/wiki/Q379741",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "aliases": [
  "ASF"
 ],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}