{
 "id": "theora",
 "name": "Theora",
 "category": "video",
 "identifiers": {
  "extensions": [
   "ogg",
   "ogv"
  ],
  "mime": [
   "video/ogg",
   "video/theora"
  ],
  "puid": [
   "fmt/945"
  ],
  "wikidata": [
   "Q372626"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "4f6767530002",
    "notes": "Ogg Theora Video variant 1"
   }
  ],
  "signatures": [
   {
    "name": "Ogg Theora Video variant 1",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "4f6767530002{22}807468656f7261030201{32}4f676753"
     }
    ]
   },
   {
    "name": "Ogg Theora Video variant 2",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "4f6767530002{22}6669736865616400{56-72}4f6767530002{22}807468656f7261030201{32}4f676753"
     }
    ]
   }
  ],
  "priority_over": [
   "fmt/944"
  ]
 },
 "status": "writable",
 "summary": "Ogg is a free, open container format maintained by the Xiph.Org Foundation. The Ogg container format can multiplex a number of independent streams for audio, video, text, and metadata. Theora is a free, lossy video compression format also developed by the Xiph.Org Foundation.",
 "tools": [
  {
   "name": "Apache Tika",
   "url": "https://tika.apache.org",
   "reads": true,
   "writes": false,
   "license": "Apache Software License 2.0",
   "open_source": true
  },
  {
   "name": "Flowplayer",
   "url": "https://flowplayer.com",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "libtheora",
   "url": "https://theora.org/",
   "reads": true,
   "writes": true,
   "license": "3-clause BSD License",
   "open_source": true
  },
  {
   "name": "Liquidsoap",
   "url": "https://www.liquidsoap.info/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "LiVES",
   "url": "http://lives-video.com/",
   "reads": true,
   "writes": false
  },
  {
   "name": "Media Player (Windows 11)",
   "url": "https://www.wikidata.org/wiki/Q109616196",
   "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": "Q117725",
   "url": "https://picard.musicbrainz.org",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Synfig",
   "url": "https://synfig.org",
   "reads": false,
   "writes": true,
   "license": "GNU General Public License, version 2.0",
   "open_source": true
  },
  {
   "name": "Visualization Toolkit",
   "url": "http://www.vtk.org/",
   "reads": true,
   "writes": true,
   "license": "3-clause BSD License",
   "open_source": true
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/Theora",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/945",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/945",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q372626",
   "url": "https://www.wikidata.org/wiki/Q372626",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}