libwebm を Homebrew でインストール

プロジェクトリンク

• ホームページ
• リポジトリ

コマンドとエイリアス

• mkvmuxer_sample
• mkvparser_sample
• vttdemux
• webm2pes

プロジェクトの歴史

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.

採用の歴史

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.

使われ方

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.

パッケージ好きにとっての重要性

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.

タイムライン

• 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.

ソース

• https://blog.chromium.org/2010/05/
• https://blog.chromium.org/2020/05/celebrating-10-years-of-webm-and-webrtc.html
• https://chromium.googlesource.com/webm/libwebm/
• https://github.com/webmproject/libwebm/
• https://www.webmproject.org/
• https://www.webmproject.org/about/faq/
• https://www.webmproject.org/code/