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brew

codec2 を Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper でインストール

codec2 のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

インストールコマンドセキュリティノート

インストール

追加のインストールコマンド

macOS

Homebrew確認済み · 100%
brew install codec2

local Homebrew formula metadata

MacPorts確認済み · 94%
sudo port install codec2

MacPorts ports tree · audio/codec2/Portfile · ソース: api.github.com

Linux

Alpine Linux apk確認済み · 92%
sudo apk add codec2

Alpine Linux edge package indexes · codec2 · ソース: dl-cdn.alpinelinux.org

Debian apt確認済み · 92%
sudo apt install codec2

Debian stable package indexes · codec2 · ソース: deb.debian.org

Fedora dnf確認済み · 92%
sudo dnf install codec2

Fedora Rawhide package metadata · codec2 · ソース: dl.fedoraproject.org

Nix確認済み · 92%
nix profile install nixpkgs#codec2

nixpkgs package indexes · pkgs/by-name/co/codec2/package.nix · ソース: api.github.com

Arch Linux pacman確認済み · 92%
sudo pacman -S codec2

Arch Linux sync databases · codec2 · ソース: geo.mirror.pkgbuild.com

openSUSE zypper確認済み · 92%
sudo zypper install codec2

openSUSE Tumbleweed package metadata · codec2 · ソース: download.opensuse.org

概要

パッケージ概要

Open source speech codec

コマンドとエイリアス

  • c2dec
  • c2demo
  • c2enc
  • c2sim

履歴

プロジェクトの歴史と使われ方

Codec 2 is an LGPL open-source low-bit-rate speech codec written in C for communications-quality speech around 700 to 3200 bit/s. Its main application is low-bandwidth HF/VHF digital radio, where open codecs are important because many comparable vocoders have historically been proprietary or patent-encumbered.

プロジェクトの歴史

David Rowe announced the project on 2009-08-21 in a Rowetel post titled Open Source Low Rate Speech Codec Part 1, describing a plan for a free low-bit-rate speech codec initially targeting 2400 bit/s communications-quality speech. The motivation was explicitly tied to ham radio, low-bandwidth digital radio, and the lack of open sub-5 kbit/s speech codecs.

The current Codec 2 README says the project is C99, LGPL 2.1, and includes the FreeDV API, HF OFDM and FSK modems, FEC, packet-data APIs, and embedded FreeDV support. In July 2023 the repository was refactored, with older code moved to `drowe67/codec2-dev`.

The Rowetel Codec 2 page says the codec fills a gap below 5000 bit/s and integrates with FreeDV, an open-source digital voice protocol that combines modems, codecs, and FEC.

採用の歴史

Codec 2 has unusually broad package-manager distribution for a specialized DSP library: the input package facts list Alpine, Homebrew, Debian, Fedora/DNF, MacPorts, Nix, Arch/pacman, Ubuntu, and openSUSE/Zypper. That reflects its use as both a library and a command-line toolkit in radio and audio stacks.

The official FreeDV documentation shows Codec 2 modes inside multiple FreeDV HF and VHF modes from 2012 onward, including 1600, 700C, 700D, 700E, 2400A, and 2400B. This is adoption through an application protocol rather than a standalone end-user CLI alone.

使われ方

The README documents simple command-line workflows with `c2enc`, `c2dec`, `c2demo`, and `c2sim`, including one-liners that encode raw speech, decode it, and play it through ALSA tools. It also documents FreeDV transmit and receive programs, modem programs, LDPC utilities, and build instructions for Linux, Windows cross-compilation, Android, and microcontrollers.

In practice, Codec 2 is used by developers and radio experimenters as a codec library, a set of command-line demonstrations, and the speech-coding component of FreeDV digital voice modes.

パッケージ好きにとっての重要性

Codec 2 matters to package maintainers because it is a rare open implementation in the very-low-bit-rate speech codec space, packaged widely despite being specialized DSP software. It brings together C libraries, demo CLIs, radio modem tooling, Octave test/development scripts, embedded targets, and FreeDV protocol support.

It is also a good example of why package histories are not just download counts: the package is important because downstream radio applications, Linux distributions, and experimenters need an auditable open codec where proprietary alternatives such as AMBE and MELP are culturally and legally awkward.

タイムライン

  • 2009-08-21: David Rowe publicly announces the open-source low-rate speech codec project.
  • 2012: FreeDV 1600 mode uses Codec 2 1300 according to the FreeDV mode table.
  • 2016: FreeDV 2400A and 2400B VHF modes use Codec 2 1300.
  • 2017: FreeDV 700C and 800XA modes use Codec 2 700C.
  • 2018: FreeDV 700D uses Codec 2 700C.
  • 2020: FreeDV 700E appears in the official FreeDV mode table.
  • 2023-07: Current README says the repo was refactored and older code moved to codec2-dev.
  • 2023-07-24: Codec2 1.2.0 release published in the current GitHub repository.

Related projects

  • FreeDV is the most closely related project and is described by the README and Rowetel page as an open-source digital voice protocol integrating Codec 2, modems, and FEC. The repository also references `codec2-dev` for older code, `drowe67/LPCNet` for FreeDV 2020 support, the SM1000 FreeDV adaptor, and modem components such as OFDM, FDMDV, COHPSK, FSK, and LDPC utilities.

セキュリティ状態

リスクレベル: グリーン

narrow executable package without higher-risk signals.

リスク分類器

リスク グリーン · 信頼度 低 · appliance

理由

  • narrow executable package without higher-risk signals

信号

  • metadata:no-higher-risk-signals

インストール挙動

  • formula メタデータに Homebrew post-install フックは記録されていません。
  • Homebrew bottle メタデータは 12 個のプラットフォームターゲットで利用できます。
  • ビルドメタデータには 1 件のビルド依存関係があります。

推奨レビュー

エージェントに無人実行させる前に、このツールが平文の認証情報を読むか、リモート状態を書き込むか、成果物を公開するか、プラグインを起動するかを確認してください。

実行可能ファイル

インストールされる実行可能ファイル

コマンド種類公開範囲メモ
c2deccliグローバル実行可能ファイル
c2democliグローバル実行可能ファイル
c2enccliグローバル実行可能ファイル
c2simcliグローバル実行可能ファイル

鮮度

バージョンと鮮度

これらの信号は、ページ生成時期、パッケージマネージャの活動、上流リリース比較を分けて示します。バージョン遅れは、証拠 URL と比較可能なバージョンがある場合だけ警告されます。

ページ生成日2026-07-25
マネージャ版1.2.0
マネージャ更新日
ローカルデータOK
上流最新
検出された最新1.2.0

https://github.com/drowe67/codec2

  • 情報No package-manager update timestamp was available.信頼度 低

インストールメタデータ

パッケージメタデータ

パッケージキーbrew:codec2
バージョン1.2.0
パッケージマネージャHomebrew
パッケージマネージャページhttps://formulae.brew.sh/formula/codec2
ホームページhttps://www.rowetel.com/?page_id=452
リポジトリhttps://github.com/drowe67/codec2
上流ドキュメントhttps://github.com/drowe67/codec2#readme
ライセンスLGPL-2.1-only
ソースアーカイブhttps://github.com/drowe67/codec2/archive/refs/tags/1.2.0.tar.gz
ビルド依存関係cmake
Bottle利用可能 (対象 arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, monterey, sonoma, ventura, x86_64_linux)
Homebrew post-install未定義
サービス宣言なし

レジストリ情報

ソースデータベース詳細

Source DatabaseHomebrew formula API
Taphomebrew/core
Full Namecodec2
Version Scheme0
Revision0
Bottle Stable Root URLhttps://ghcr.io/v2/homebrew/core
Deprecatedno
Disabledno
Keg Onlyno
URL Keys
  • stable

ソースデータベース一致

他のパッケージマネージャ記録

一致は外部パッケージマネージャインデックスから取得され、ローカルの Automic Vault パッケージリンクとは分けて表示されます。

Debian apt95%

codec2 1.2.0-3

command line tools for handling Codec2 data

http://rowetel.com/codec2.html

sudo apt install codec2
  • Section: sound
  • Architecture: amd64
  • 2 依存関係
  • normalized package name match
  • 一致条件: Codec2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: codec2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Debian apt95%

libcodec2-1.2 1.2.0-3

Codec2 runtime library

http://rowetel.com/codec2.html

sudo apt install libcodec2-1.2
  • Section: libs
  • Architecture: amd64
  • Source Package: codec2
  • 1 依存関係
  • normalized package name match
  • 一致条件: Codec2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: libcodec2-1.2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Debian apt95%

libcodec2-dev 1.2.0-3

Codec2 library development files

http://rowetel.com/codec2.html

sudo apt install libcodec2-dev
  • Section: libdevel
  • Architecture: amd64
  • Source Package: codec2
  • 1 依存関係
  • 1 任意依存関係
  • normalized package name match
  • 一致条件: Codec2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: libcodec2-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Nix95%

codec2

nix profile install nixpkgs#codec2
  • normalized package name match
  • 一致条件: Codec2
nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/co/codec2/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
Ubuntu apt95%

codec2 1.2.0-2build1

command line tools for handling Codec2 data

http://rowetel.com/codec2.html

sudo apt install codec2
  • Section: universe/sound
  • Architecture: amd64
  • 2 依存関係
  • normalized package name match
  • 一致条件: Codec2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: codec2 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz
Ubuntu apt95%

libcodec2-1.2 1.2.0-2build1

Codec2 runtime library

http://rowetel.com/codec2.html

sudo apt install libcodec2-1.2
  • Section: universe/libs
  • Architecture: amd64
  • Source Package: codec2
  • 1 依存関係
  • normalized package name match
  • 一致条件: Codec2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: libcodec2-1.2 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz
Ubuntu apt95%

libcodec2-dev 1.2.0-2build1

Codec2 library development files

http://rowetel.com/codec2.html

sudo apt install libcodec2-dev
  • Section: universe/libdevel
  • Architecture: amd64
  • Source Package: codec2
  • 1 依存関係
  • 1 任意依存関係
  • normalized package name match
  • 一致条件: Codec2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: libcodec2-dev from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz
apk95%

codec2 1.2.0-r1

Open source speech codec designed for communications quality speech between 700 and 3200 bps

https://github.com/drowe67/codec2

sudo apk add codec2
  • License: LGPL-2.1-or-later
  • Architecture: x86_64
  • Source Package: codec2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Codec2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: codec2 from https://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz
apk95%

codec2-dev 1.2.0-r1

Open source speech codec designed for communications quality speech between 700 and 3200 bps (development files)

https://github.com/drowe67/codec2

sudo apk add codec2-dev
  • License: LGPL-2.1-or-later
  • Architecture: x86_64
  • Source Package: codec2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Codec2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: codec2-dev from https://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz
dnf95%

codec2 1.2.0-9.fc44

Next-Generation Digital Voice for Two-Way Radio

http://rowetel.com/codec2.html

sudo dnf install codec2
  • License: LGPL-2.1-only
  • Category: Unspecified
  • Architecture: i686
  • Source Package: codec2
  • 5 依存関係
  • 2 提供
  • normalized package name match
  • 一致条件: Codec2
Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: codec2 from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst
dnf95%

codec2-devel 1.2.0-9.fc44

Development files for Codec 2

http://rowetel.com/codec2.html

sudo dnf install codec2-devel
  • License: LGPL-2.1-only
  • Category: Unspecified
  • Architecture: i686
  • Source Package: codec2
  • 4 依存関係
  • 3 提供
  • normalized package name match
  • 一致条件: Codec2
Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: codec2-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst
pacman95%

codec2 1:1.2.0-2

Open source speech codec designed for communications quality speech between 450 and 3200 bit/s

https://github.com/drowe67/codec2

sudo pacman -S codec2
  • License: LGPL2.1
  • Architecture: x86_64
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Codec2
Arch Linux sync databases · geo.mirror.pkgbuild.com · Arch Linux sync databases: codec2 from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz
zypper95%

codec2 1.2.0-2.5

Low bit rate speech codec

https://rowetel.com/codec2.html

sudo zypper install codec2
  • License: LGPL-2.1-only
  • Category: Unspecified
  • Architecture: x86_64
  • Source Package: codec2
  • 3 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Codec2
openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: codec2 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst
zypper95%

codec2-devel 1.2.0-2.5

Development library for codec2

https://rowetel.com/codec2.html

sudo zypper install codec2-devel
  • License: LGPL-2.1-only
  • Category: Unspecified
  • Architecture: x86_64
  • Source Package: codec2
  • 2 依存関係
  • 3 提供
  • normalized package name match
  • 一致条件: Codec2
openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: codec2-devel from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst
zypper95%

codec2-examples 1.2.0-2.5

Example code for Codec 2

https://rowetel.com/codec2.html

sudo zypper install codec2-examples
  • License: LGPL-2.1-only
  • Category: Productivity/Hamradio/Other
  • Architecture: noarch
  • Source Package: codec2
  • 1 提供
  • normalized package name match
  • 一致条件: Codec2
openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: codec2-examples from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst
zypper95%

libcodec2-1_2 1.2.0-2.5

Low bit rate speech codec

https://rowetel.com/codec2.html

sudo zypper install libcodec2-1_2
  • License: LGPL-2.1-only
  • Category: Unspecified
  • Architecture: x86_64
  • Source Package: codec2
  • 3 依存関係
  • 2 提供
  • normalized package name match
  • 一致条件: Codec2
openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: libcodec2-1_2 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst

パッケージグラフ

リンクは、ローカルのパッケージ関係グラフ、補足データ、依存関係、エコシステム一致、パッケージハブ所属から来ています。

関連ツール

  • cmakeBuild dependency declared by Homebrew.

同じワークフロー

  • fdk-aacShares av.db curated category or tags: audio-codec, c, cli, media.
  • alsa-libShares av.db curated category or tags: audio, c, cli, media.
  • flakeShares av.db curated category or tags: audio-codec, cli, media.
  • freealutShares av.db curated category or tags: audio, c, cli, media.
  • id3libShares av.db curated category or tags: audio, c, cli, media.
  • libgsmShares av.db curated category or tags: audio-codec, cli, media.

エージェント安全ガイド

ソース経路

リポジトリデータから生成

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使用ソース

  • Geiger risk classifier
  • Nucleus package database
  • av.db category and tag curation
  • cross-ecosystem install command graph
  • curated package history
  • external package-manager database matches
  • package relationship graph
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