{
 "id": "audio-video-interleaved-format",
 "name": "Audio/Video Interleaved Format",
 "category": "audio",
 "identifiers": {
  "extensions": [
   "avi"
  ],
  "mime": [
   "video/avi",
   "video/x-msvideo",
   "video/vnd.avi",
   "video/msvideo"
  ],
  "puid": [
   "fmt/5"
  ],
  "wikidata": [
   "Q209054"
  ],
  "loc_fdd": [
   "fdd000059"
  ],
  "uti": [
   "public.avi"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "52494646",
    "notes": "AVI"
   }
  ],
  "signatures": [
   {
    "name": "AVI",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "52494646{4}41564920"
     }
    ]
   }
  ],
  "priority_over": [
   "fmt/1886"
  ]
 },
 "status": "writable",
 "summary": "Audio/Video Interleaved Format (AVI) is a chunk-based video format developed by Microsoft, based on the generic Resource Interchange File Format (RIFF) specification developed by Microsoft and IBM. Structurally, an AVI file is composed of a number of chunks, each comprising a four character code chunk identifier, the chunk size, and the chunk data. It comprises a RIFF header with an AVI data type identifier, followed by a series of chunks. Every file must include two List chunks. The first List chunk is the main AVI header chunk, which contain one or more Stream Header chunks, one for each data stream, describing the format of the data streams. The second LIST chunk is the ‘movi’ chunk, which contains the actual data for the audio and video data streams. Other optional chunks are also allowed. The format supports a wide variety of compressed and uncompressed video encodings, but all audio streams are stored in Microsoft’s Waveform Audio format.",
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  },
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 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/AVI",
   "kind": "wiki"
  },
  {
   "name": "Kaitai Struct: avi",
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  },
  {
   "name": "Wikidata Q209054",
   "url": "https://www.wikidata.org/wiki/Q209054",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "converters",
   "engines",
   "ffw",
   "kaitai",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-25",
 "aliases": [
  "AVI (Generic)"
 ],
 "parsers": [
  {
   "engine": "kaitai",
   "url": "https://github.com/kaitai-io/kaitai_struct_formats/blob/master/media/avi.ksy",
   "license": "CC0-1.0"
  }
 ],
 "conversions": [
  {
   "to": "flac-free-lossless-audio-codec-1-2-1",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.flac",
   "fidelity": "lossless",
   "losses": "Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "waveform-audio",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.wav",
   "fidelity": "lossless",
   "losses": "Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "mpeg-1-2-audio-layer-3",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.mp3",
   "fidelity": "lossy",
   "losses": "Lossy re-encoding.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "ogg",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.ogg",
   "fidelity": "lossy",
   "losses": "Lossy re-encoding.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "mpeg-4-part-14",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.mp4",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "matroska-1-4",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.mkv",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "webm",
   "tool": "FFmpeg",
   "command": "ffmpeg -i in.avi out.webm",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.",
   "url": "https://ffmpeg.org"
  },
  {
   "to": "mpeg-4-part-14",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs (H.264/AAC, or VP8/Vorbis for WebM).",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "webm",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs (H.264/AAC, or VP8/Vorbis for WebM).",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "matroska",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs (H.264/AAC, or VP8/Vorbis for WebM).",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "quicktime",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "lossy",
   "losses": "Re-encoded with lossy codecs (H.264/AAC, or VP8/Vorbis for WebM).",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "gif",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "lossy",
   "losses": "10 frames per second, at most 480 pixels wide, 256 colours, no sound.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "mpeg-1-2-audio-layer-3",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "partial",
   "losses": "Lossy audio only: the video is dropped.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "waveform-audio",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "partial",
   "losses": "Audio track only: the video is dropped.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "flac-free-lossless-audio-codec-1-2-1",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "partial",
   "losses": "Audio track only: the video is dropped.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "ogg",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "partial",
   "losses": "Lossy audio only: the video is dropped.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "ogg-opus-codec-compressed-multimedia-file",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "partial",
   "losses": "Lossy audio only: the video is dropped.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  },
  {
   "to": "advanced-audio-coding",
   "tool": "FFmpeg (WebAssembly)",
   "command": "In the browser at https://openformatdb.org/convert/, or convert_file in the OpenFormatDB MCP server",
   "fidelity": "partial",
   "losses": "Lossy audio only: the video is dropped.",
   "url": "https://openformatdb.org/convert/",
   "engine": "ffmpeg"
  }
 ],
 "structure": [],
 "samples": [],
 "claims": [],
 "verification": []
}