macOS
Homebrewverified · 100%
brew install libwebmlocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install libwebmMacPorts ports tree · multimedia/libwebm/Portfile · source: api.github.com
brew
Install libwebm with Homebrew, apt, MacPorts, Nix
WebM container. Version 1.0.0.32 via Homebrew; verified from local package data.
install
Additional install commands
Linux
Debian aptverified · 92%
sudo apt install libwebm-devDebian stable package indexes · libwebm-dev · source: deb.debian.org
Nixverified · 92%
nix profile install nixpkgs#libwebmnixpkgs package indexes · pkgs/by-name/li/libwebm/package.nix · source: api.github.com
overview
Package summary
WebM container
Project links
Commands and aliases
- mkvmuxer_sample
- mkvparser_sample
- vttdemux
- webm2pes
history
Project history and usage
libwebm is the WebM Project's C++ parser and muxer library for the WebM container, which is based on Matroska and designed for open web video. It sits next to libvpx in the WebM ecosystem: libvpx handles VP8/VP9 codec work, while libwebm handles the container-level reading and writing that tools need.
Project history
Google and browser partners announced WebM on 2010-05-19 as an open, freely implementable web-optimized video format centered on VP8. The WebM Project FAQ defines WebM files as VP8 or VP9 video, Vorbis or Opus audio, and WebVTT text tracks in a Matroska-based structure.
The WebM developer overview lists libwebm as the WebM file parser, with the canonical browse repository at chromium.googlesource.com/webm/libwebm and a GitHub mirror. The README focuses on building libwebm with CMake or Makefile.unix and running parser/muxer tests, reflecting its role as a library component rather than an end-user player.
Adoption history
WebM gained early browser and tooling momentum because Chromium added initial WebM and VP8 support on the announcement day, and Google framed the format as part of the open HTML5 video stack. Chromium's 2020 retrospective describes WebM and WebRTC as foundational web media projects and cites adoption by major video platforms and technology companies across VP8, VP9, and AV1-era work.
libwebm's adoption is quieter than the WebM format itself: it is the container library that package managers expose for encoders, muxers, parsers, media-inspection tools, and test programs that need a native WebM implementation.
How it is used
The package ships sample and utility programs such as mkvmuxer_sample, mkvparser_sample, vttdemux, and webm2pes. Developers use the library to parse WebM files, mux WebM output, inspect tracks and cues, and build media tooling around the WebM container.
Why package nerds care
libwebm is one of those small libraries that makes an open media format real in build graphs. Installing it gives media packages a maintained WebM parser and muxer without pulling in a whole browser, and its canonical Git-on-Google plus GitHub mirror layout is typical of Chromium-adjacent infrastructure.
Timeline
- 2010-05-19: WebM and VP8 are announced, and Chromium adds initial support.
- 2011-01-11: Chromium describes broad WebM adoption by browsers, tools, and hardware vendors after launch.
- 2013: The WebM Project delivers VP9-era bitrate improvements, according to Chromium's 2020 retrospective.
- 2018: AV1-era open media work is described as adding further bitrate savings in the Chromium retrospective.
- 2020-05-27: Chromium publishes a ten-year WebM and WebRTC retrospective.
- 2025: The libwebm repository continues as a Chromium Gitiles project with a GitHub mirror and version tags such as libwebm-1.0.0.32.
Related projects
- Related projects include libvpx, webm-tools, WebM DirectShow filters, Matroska, WebVTT, Vorbis, Opus, VP8, VP9, AV1, Chromium, YouTube, and the Alliance for Open Media.
Sources
security posture
Risk level: orange
infrastructure mutation or orchestration signal.
Risk classifier
orange risk · medium confidence · infrastructure
Why
- infrastructure mutation or orchestration signal
Signals
- text:container
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 8 platform targets.
- Build metadata lists 1 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
mkvmuxer_sample | cli | global executable | |
mkvparser_sample | cli | global executable | |
vttdemux | cli | global executable | |
webm2pes | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version1.0.0.32
manager updated
local dataok
upstreamnot checked
latest detectednot detected
https://github.com/webmproject/libwebm
- infoNo package-manager update timestamp was available.low confidence
- infoNo cached GitHub release or tag data was available.https://github.com/webmproject/libwebmnone confidence
install metadata
Package metadata
| Package key | brew:libwebm |
|---|---|
| Version | 1.0.0.32 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/libwebm |
| Homepage | https://www.webmproject.org/code/ |
| Repository | https://github.com/webmproject/libwebm |
| Upstream docs | https://github.com/webmproject/libwebm |
| License | BSD-3-Clause |
| Source archive | https://github.com/webmproject/libwebm/archive/refs/tags/libwebm-1.0.0.32.tar.gz |
| Build dependencies | cmake |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, sonoma, ventura, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | libwebm |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Debian apt95%
libwebm-dev 1.0.0.31-1+b2
WebM parser library (development files)
https://chromium.googlesource.com/webm/libwebm
sudo apt install libwebm-dev- Section: libdevel
- Architecture: amd64
- Source Package: libwebm
- 1 dependencies
- normalized package name match
- Matched by: Libwebm
Debian apt95%
libwebm-tools 1.0.0.31-1+b2
WebM parser library (binary tools)
https://chromium.googlesource.com/webm/libwebm
sudo apt install libwebm-tools- Section: video
- Architecture: amd64
- Source Package: libwebm
- 4 dependencies
- normalized package name match
- Matched by: Libwebm
Debian apt95%
libwebm1 1.0.0.31-1+b2
WebM parser library
https://chromium.googlesource.com/webm/libwebm
sudo apt install libwebm1- Section: libs
- Architecture: amd64
- Source Package: libwebm
- 3 dependencies
- normalized package name match
- Matched by: Libwebm
Nix95%
libwebm
nix profile install nixpkgs#libwebm- normalized package name match
- Matched by: Libwebm
Ubuntu apt95%
libwebm-dev 1.0.0.31-1build1
WebM parser library (development files)
https://chromium.googlesource.com/webm/libwebm
sudo apt install libwebm-dev- Section: universe/libdevel
- Architecture: amd64
- Source Package: libwebm
- 1 dependencies
- normalized package name match
- Matched by: Libwebm
Ubuntu apt95%
libwebm-tools 1.0.0.31-1build1
WebM parser library (binary tools)
https://chromium.googlesource.com/webm/libwebm
sudo apt install libwebm-tools- Section: universe/video
- Architecture: amd64
- Source Package: libwebm
- 4 dependencies
- normalized package name match
- Matched by: Libwebm
Ubuntu apt95%
libwebm1 1.0.0.31-1build1
WebM parser library
https://chromium.googlesource.com/webm/libwebm
sudo apt install libwebm1- Section: universe/libs
- Architecture: amd64
- Source Package: libwebm
- 3 dependencies
- normalized package name match
- Matched by: Libwebm
MacPorts95%
libwebm
sudo port install libwebm- normalized package name match
- Matched by: Libwebm
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- 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
- package version freshness
- package-page enrichment