PageSourceSearch

https://ffmpegwasm.netlify.app/docs/overview/

html ffmpegwasm.netlify.app collected 2026-10-03 10:43:59 UTC 30,807 bytes, 53 lines download raw bytes

1<!doctype html>
2<html lang="en" dir="ltr" class="docs-wrapper docs-doc-page docs-version-current plugin-docs plugin-id-default docs-doc-id-overview">
3<head>
4<meta charset="UTF-8">
5<!-- This site is hosted on Netlify. Anyone can build and deploy a site
6     like this one for free: https://netlify.new/?utm_campaign=loops&utm_source=ai-legible&utm_medium=owned&utm_content=comment&utm_id=1943b6d3-45ad-4b46-bfba-cb8d5716604c
7     Netlify hosting facts for this site: static/SSR served via Netlify Edge. -->
8<meta name="generator" content="Docusaurus v2.4.1">
9<title data-rh="true">Overview | ffmpeg.wasm</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://ffmpegwasm.netlify.app/docs/overview"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Overview | ffmpeg.wasm"><meta data-rh="true" name="description" content="For 0.11.x, visit https://ffmpegwasm-0-11-x.netlify.app"><meta data-rh="true" property="og:description" content="For 0.11.x, visit https://ffmpegwasm-0-11-x.netlify.app"><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://ffmpegwasm.netlify.app/docs/overview"><link data-rh="true" rel="alternate" href="https://ffmpegwasm.netlify.app/docs/overview" hreflang="en"><link data-rh="true" rel="alternate" href="https://ffmpegwasm.netlify.app/docs/overview" hreflang="x-default"><link rel="alternate" type="application/rss+xml" href="/blog/rss.xml" title="ffmpeg.wasm RSS Feed">
10<link rel="alternate" type="application/atom+xml" href="/blog/atom.xml" title="ffmpeg.wasm Atom Feed">
11
12<link rel="preconnect" href="https://www.google-analytics.com">
13<link rel="preconnect" href="https://www.googletagmanager.com">
vendor: 64 bytes, lines 13-14
13
14<script async src="https://www.googletagmanager.com/gtag/js?id=
14G-8NBTQ7N6RB
vendor: 12 bytes, line 14
14"></script>
15<script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","G-8NBTQ7N6RB",{anonymize_ip:!0})</script>
15
16
17
18
19
20
21
22<script src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8688083214014126" async crossorigin="anonymous"></script>
22<link rel="stylesheet" href="/assets/css/styles.e1f3b995.css">
23<link rel="preload" href="/assets/js/runtime~main.2f9ddcec.js" as="script">
24<link rel="preload" href="/assets/js/main.f566629e.js" as="script">
25</head>
26<body class="navigation-with-keyboard">
27<script>!function(){function t(t){document.documentElement.setAttribute("data-theme",t)}var e=function(){var t=null;try{t=new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}return t}()||function(){var t=null;try{t=localStorage.getItem("theme")}catch(t){}return t}();t(null!==e?e:"light")}()</script>
27<div id="__docusaurus">
28<div role="region" aria-label="Skip to main content"><a class="skipToContent_G6ar" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><nav aria-label="Main" class="navbar navbar--fixed-top"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a class="navbar__brand" href="/"><div class="navbar__logo"><img src="/img/logo192.png" alt="ffmpeg.wasm Logo" class="themedImage_RWGG themedImage--light_riBm"><img src="/img/logo192.png" alt="ffmpeg.wasm Logo" class="themedImage_RWGG themedImage--dark_Dsi0"></div><b class="navbar__title text--truncate">ffmpeg.wasm</b></a><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/docs/overview">Docs</a><a class="navbar__item navbar__link" href="/playground">Playground</a><a class="navbar__item navbar__link" href="/blog">Blog</a></div><div class="navbar__items navbar__items--right"><a href="https://github.com/ffmpegwasm/ffmpeg.wasm" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">GitHub<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_awgD"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a><div class="toggle_OLSw colorModeToggle_Hg9V"><button class="clean-btn toggleButton_wYmb toggleButtonDisabled_vaDU" type="button" disabled="" title="Switch between dark and light mode (currently light mode)" aria-label="Switch between dark and light mode (currently light mode)" aria-live="polite"><svg viewBox="0 0 24 24" width="24" height="24" class="lightToggleIcon_Sxwe"><path fill="currentColor" d="M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" class="darkToggleIcon_Yem1"><path fill="currentColor" d="M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"></path></svg></button></div><div class="searchBox_xrOJ"><div class="navbar__search searchBarContainer_YZIh"><input placeholder="Search" aria-label="Search" class="navbar__search-input"><div class="loadingRing_pJhT searchBarLoadingRing_NsvA"><div></div><div></div><div></div><div></div></div></div></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_UyTV docsWrapper_BqXd"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_z1FD" type="button"></button><div class="docPage_pOTq"><aside class="theme-doc-sidebar-container docSidebarContainer_aIKW"><div class="sidebarViewport_DwR9"><div class="sidebar_vJCc"><nav aria-label="Docs sidebar" class="menu thin-scrollbar menu_qiME"><ul class="theme-doc-sidebar-menu menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link menu__link--active" aria-current="page" href="/docs/overview">Overview</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/getting-started/installation">Getting Started</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/performance">Performance</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/migration">Migrating from 0.11.x to 0.12+</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/faq">FAQ</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/api/ffmpeg/">API</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/contribution/core">Contribution</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/privacy-policy">Privacy Policy</a></li></ul></nav></div></div></aside><main class="docMainContainer_fv3b"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_YAwJ"><div class="docItemContainer_Rv5Z"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_zCmv" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_JFrk"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Overview</span><meta itemprop="position" content="1"></li></ul></nav><div class="tocCollapsible_O_Qc theme-doc-toc-mobile tocMobile_tjDr"><button type="button" class="clean-btn tocCollapsibleButton_htYj">On this page</button></div><div class="theme-doc-markdown markdown"><h1>
28Overview</h1><div class="theme-admonition theme-admonition-info alert alert--info admonition_qNG0"><div class="admonitionHeading_l909"><span class="admonitionIcon_UNbs"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z"></path></svg></span>info</div><div class="admonitionContent_oUmQ"><p>For 0.11.x, visit <a href="https://ffmpegwasm-0-11-x.netlify.app" target="_blank" rel="noopener noreferrer">https://ffmpegwasm-0-11-x.netlify.app</a>
29and <a href="https://github.com/ffmpegwasm/ffmpeg.wasm/tree/0.11.x" target="_blank" rel="noopener noreferrer">0.11.x</a> branch.</p></div></div><h2 class="anchor anchorWithStickyNavbar_fF9Z" id="introduction">Introduction<a href="#introduction" class="hash-link" aria-label="Direct link to Introduction" title="Direct link to Introduction">​</a></h2><p>ffmpeg.wasm is a pure WebAssembly / JavaScript port of <a href="https://www.ffmpeg.org/" target="_blank" rel="noopener noreferrer">FFmpeg</a>
30enabling video &amp; audio record, convert and stream right inside browsers.</p><p>We leverage
31<a href="https://emscripten.org/" target="_blank" rel="noopener noreferrer">Emscripten</a> to transpile FFmpeg source code and many
32libraries to WebAssembly and develop a minimal but essential library to free
33developers from common requirements like running ffmpeg inside web worker and
34more.</p><h2 class="anchor anchorWithStickyNavbar_fF9Z" id="advantages">Advantages<a href="#advantages" class="hash-link" aria-label="Direct link to Advantages" title="Direct link to Advantages">​</a></h2><ul><li><strong>Security</strong>: your users&#x27; data only lives inside their browser, no need to
35worry about any data leakage or network latency.</li><li><strong>Client-side computing</strong>: instead of hosting a cluster of server-end servers,
36you can now offload multimedia processing to client-side.</li><li><strong>Flexible</strong>: ffmpeg.wasm comes with single-thread and multi-thread cores, you
37can use whichever fits your use case.</li></ul><h2 class="anchor anchorWithStickyNavbar_fF9Z" id="architecture">Architecture<a href="#architecture" class="hash-link" aria-label="Direct link to Architecture" title="Direct link to Architecture">​</a></h2><p><img loading="lazy" alt="architecture" src="/assets/images/ffmpegwasm-arch-918a2b3e4629947bae75e8f42a779def.png" width="811" height="483" class="img__Ss2"></p><p>Multimedia transcoding is a resource-intensive task that you don&#x27;t want to
38execute in main thread, thus in ffmpeg.wasm we offload those task to web worker
39(<code>ffmpeg.worker</code>) by default. This makes almost all function calls in ffmpeg.wasm
40are asynchronous and it is recommended to use <strong>async</strong> / <strong>await</strong> syntax.</p><p><code>ffmpeg.worker</code> downloads WebAssembly code (<code>ffmpeg-core</code>) from CDN
41and initialized it in WorkerGlobalScope. For any input video file you would like
42to process, you need to first populated them inside ffmpeg-core File System and
43also read result from <code>ffmpeg-core</code> File System once it is done.</p><p>If you are using a multi-thread version of <code>ffmpeg-core</code>, more web workers will
44be spawned by <code>ffmpeg-core</code> inside <code>ffmpeg.worker</code></p><div class="theme-admonition theme-admonition-info alert alert--info admonition_qNG0"><div class="admonitionHeading_l909"><span class="admonitionIcon_UNbs"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z"></path></svg></span>info</div><div class="admonitionContent_oUmQ"><p>The concept of <code>core</code> in ffmpeg.wasm is like the engine of a car, it is not only
45the most important part of ffmpeg.wasm but also a swappable component. Currently
46we maintain single-thread (<code>@ffmpeg/core</code>) and multi-thread version
47(<code>@ffmpeg/core-mt</code>) cores, you can build your own core (ex. a core with x264
48lib only to minimize ffmpeg-core.wasm file size) using build scripts in the repository.</p></div></div><h2 class="anchor anchorWithStickyNavbar_fF9Z" id="packages">
48Packages<a href="#packages" class="hash-link" aria-label="Direct link to Packages" title="Direct link to Packages">​</a></h2><p>All ffmpeg.wasm packages are under <a href="https://www.npmjs.com/search?q=%40ffmpeg" target="_blank" rel="noopener noreferrer">@ffmpeg</a>
49name space:</p><table><thead><tr><th>Name</th><th>Usage</th></tr></thead><tbody><tr><td>@ffmpeg/ffmpeg</td><td>ffmpeg.wasm main package</td></tr><tr><td>@ffmpeg/util</td><td>common utility functions</td></tr><tr><td>@ffmpeg/types</td><td>TypeScript types</td></tr><tr><td>@ffmpeg/core</td><td>single-thread ffmpeg.wasm core</td></tr><tr><td>@ffmpeg/core-mt</td><td>multi-thread ffmpeg.wasm core</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_fF9Z" id="libraries">Libraries<a href="#libraries" class="hash-link" aria-label="Direct link to Libraries" title="Direct link to Libraries">​</a></h2><p>ffmpeg.wasm is built with toolchains / libraries:</p><style data-emotion="css kge0eu">.css-kge0eu{width:100%;overflow-x:auto;}</style><div class="MuiTableContainer-root css-kge0eu"><style data-emotion="css 18qulp9">.css-18qulp9{display:table;width:100%;border-collapse:collapse;border-spacing:0;min-width:650px;}.css-18qulp9 caption{font-family:"Roboto","Helvetica","Arial",sans-serif;font-weight:400;font-size:0.875rem;line-height:1.43;letter-spacing:0.01071em;padding:16px;color:rgba(0, 0, 0, 0.6);text-align:left;caption-side:bottom;}</style><table class="MuiTable-root css-18qulp9" aria-label="simple table"><style data-emotion="css 1wbz3t9">.css-1wbz3t9{display:table-header-group;}</style><thead class="MuiTableHead-root css-1wbz3t9"><style data-emotion="css 1gqug66">.css-1gqug66{color:inherit;display:table-row;vertical-align:middle;outline:0;}.css-1gqug66.MuiTableRow-hover:hover{background-color:rgba(0, 0, 0, 0.04);}.css-1gqug66.Mui-selected{background-color:rgba(25, 118, 210, 0.08);}.css-1gqug66.Mui-selected:hover{background-color:rgba(25, 118, 210, 0.12);}</style><tr class="MuiTableRow-root MuiTableRow-head css-1gqug66"><style data-emotion="css 1gzy9y4">.css-1gzy9y4{font-family:"Roboto","Helvetica","Arial",sans-serif;font-weight:500;font-size:0.875rem;line-height:1.5rem;letter-spacing:0.01071em;display:table-cell;vertical-align:inherit;border-bottom:1px solid rgba(224, 224, 224, 1);text-align:center;padding:16px;color:rgba(0, 0, 0, 0.87);}</style><th class="MuiTableCell-root MuiTableCell-head MuiTableCell-alignCenter MuiTableCell-sizeMedium css-1gzy9y4" scope="col">Name</th><th class="MuiTableCell-root MuiTableCell-head MuiTableCell-alignCenter MuiTableCell-sizeMedium css-1gzy9y4" scope="col">Version</th><th class="MuiTableCell-root MuiTableCell-head MuiTableCell-alignCenter MuiTableCell-sizeMedium css-1gzy9y4" scope="col">Note</th></tr></thead><style data-emotion="css 1xnox0e">.css-1xnox0e{display:table-row-group;}</style><tbody class="MuiTableBody-root css-1xnox0e"><tr class="MuiTableRow-root css-1gqug66"><style data-emotion="css q34dxg">.css-q34dxg{font-family:"Roboto","Helvetica","Arial",sans-serif;font-weight:400;font-size:0.875rem;line-height:1.43;letter-spacing:0.01071em;display:table-cell;vertical-align:inherit;border-bottom:1px solid rgba(224, 224, 224, 1);text-align:left;padding:16px;color:rgba(0, 0, 0, 0.87);}</style><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">Emscripten</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">3.1.40</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">Emscripten is a toolchain for compiling C and C++ code into WebAssembly and JavaScript, making it possible to run applications written in these languages in web browsers.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">FFmpeg</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">n5.1.4</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">FFmpeg is a powerful multimedia framework that can decode, encode, transcode, and stream audio and video files. It&#x27;s widely used for media manipulation and streaming.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">x264</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">0.164.x</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">x264 is a popular video encoding library that provides high-quality H.264 video compression. It&#x27;s commonly used for video encoding and transcoding.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">x265</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">3.4</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">x265 is a video encoding library that specializes in encoding videos using the H.265/HEVC codec, offering high compression efficie
49ncy for video content.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">libvpx</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.13.1</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">libvpx is an open-source video codec library used for encoding and decoding VP8 and VP9 video formats, commonly used for web-based video streaming.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">lame</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">3.100</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">LAME is an audio encoder that converts audio files to the MP3 format, making it widely used for creating MP3 audio files.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">ogg</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.3.4</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">Ogg is a multimedia container format, and this library provides support for encoding and decoding audio and video in the Ogg format.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">theora</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.1.1</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">Theora is an open video codec designed for efficient video compression within the Ogg multimedia framework.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">opus</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.3.1</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">Opus is a versatile audio codec capable of handling both voice and music with low latency and high-quality compression.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">vorbis</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.3.3</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">Vorbis is an open-source audio codec known for its high audio quality and efficient compression. It&#x27;s often used for audio streaming.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">zlib</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.2.11</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">zlib is a compression library that provides data compression and decompression functionality, commonly used in file compression formats like gzip.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">libwebp</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.3.2</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">libwebp is a library for working with the WebP image format, offering efficient image compression for web use</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">freetype2</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v2.10.4</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">FreeType 2 is a library for rendering fonts. It is commonly used for text rendering in applications and systems.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">fribidi</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">v1.0.9</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">FriBidi is a library for handling bidirectional text (text containing both left-to-right and right-to-left scripts) and is often used in text layout and rendering.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">harfbuzz</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">5.2.0</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">HarfBuzz is a text shaping engine that allows complex script text to be rendered correctly. It&#x27;s used in conjunction with font rendering libraries.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">libass</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">0.15.0</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">libass is a library for rendering and formatting subtitles in multimedia applications, making it essential for displaying subtitles alongside video content.</td></tr><tr class="MuiTableRow-root css-1gqug66"><th class="MuiTableCell-root MuiTableCell-body MuiTableCell-sizeMedium css-q34dxg" scope="row">zimg</th><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">3.0.5</td><td class="MuiTableCell-root MuiTableCell-body MuiTableCell-alignLeft MuiTableCell-sizeMedium css-q34dxg">zimg implements the commonly required image processing basics of scaling, colorspace conversion, and depth conversion.</td></tr></tbody></table></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/ffmpegwasm/ffmpeg.wasm/tree/main/apps/website/docs/overview.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_UohW" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_T23F"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--next" href="/docs/getting-started/installation"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Installation</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_TN1Q thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#introduction" class="table-of-contents__link toc-highlight">Introduction</a></li><li><a href="#advantages" class="table-of-contents__link toc-highlight">Advantages</a></li><li><a href="#architecture" class="table-of-contents__link toc-highlight">Architecture</a></li><li><a href="#packages" class="table-of-contents__link toc-highlight">Packages</a></li><li><a href="#libraries" class="table-of-contents__link toc-highlight">Libraries</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links">
49<div class="col footer__col"><div class="footer__title">Docs</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/docs/overview">Tutorial</a></li></ul></div><div class="col footer__col"><div class="footer__title">Community</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://stackoverflow.com/questions/tagged/ffmpeg.wasm" target="_blank" rel="noopener noreferrer" class="footer__link-item">Stack Overflow<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_awgD"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://discord.gg/NjGMaqqfm5" target="_blank" rel="noopener noreferrer" class="footer__link-item">Discord<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_awgD"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div><div class="col footer__col"><div class="footer__title">More</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/blog">Blog</a></li><li class="footer__item"><a href="https://github.com/ffmpegwasm/ffmpeg.wasm" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_awgD"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2025 ffmpeg.wasm, Inc. Built with Docusaurus.</div></div></div></footer></div>
50<script src="/assets/js/runtime~main.2f9ddcec.js"></script>
vendor: 1 bytes, line 50
50
51<script src="/assets/js/main.f566629e.js"></script>
51
52</body>
53</html>

Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.