mirror of
https://github.com/HumanAIGC-Engineering/gradio-webrtc.git
synced 2026-02-04 17:39:23 +08:00
1171 lines
42 KiB
HTML
1171 lines
42 KiB
HTML
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<!doctype html>
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<html lang="en" class="no-js">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<link rel="canonical" href="https://fastrtc.org/userguide/video/">
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<link rel="prev" href="../audio/">
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<link rel="next" href="../audio-video/">
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<link rel="icon" href="../../fastrtc_logo.png">
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<meta name="generator" content="mkdocs-1.6.1, mkdocs-material-9.6.14">
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<title>Video Streaming - FastRTC</title>
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<link rel="stylesheet" href="../../assets/stylesheets/main.342714a4.min.css">
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<link rel="stylesheet" href="../../assets/stylesheets/palette.06af60db.min.css">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
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<style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>
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<link rel="stylesheet" href="../../stylesheets/extra.css">
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github-dark.min.css">
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<script>__md_scope=new URL("../..",location),__md_hash=e=>[...e].reduce(((e,_)=>(e<<5)-e+_.charCodeAt(0)),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>
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</head>
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<body dir="ltr" data-md-color-scheme="fastrtc-dark" data-md-color-primary="indigo" data-md-color-accent="indigo">
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<input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
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<input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
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<label class="md-overlay" for="__drawer"></label>
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<div data-md-component="skip">
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<a href="#video-streaming" class="md-skip">
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Skip to content
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</a>
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</div>
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<div data-md-component="announce">
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</div>
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<header class="md-header md-header--shadow" data-md-component="header">
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<nav class="md-header__inner md-grid" aria-label="Header">
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<a href="../.." title="FastRTC"
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class="md-header__button md-logo" aria-label="FastRTC" data-md-component="logo">
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<img src="../../fastrtc_logo.png" alt="logo">
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</a>
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<label class="md-header__button md-icon" for="__drawer">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z"/></svg>
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</label>
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<div class="md-header__title" data-md-component="header-title">
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<div class="md-header__ellipsis">
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<div class="md-header__topic">
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<span class="md-ellipsis">
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FastRTC
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</span>
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</div>
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<div class="md-header__topic" data-md-component="header-topic">
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<span class="md-ellipsis">
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Video Streaming
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</span>
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</div>
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</div>
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</div>
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<div style="display: flex; align-items: center; margin-right: 1rem;">
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<a href="https://hf.co/fastrtc" target="_blank" rel="noopener noreferrer">
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<img src="/hf-logo.svg"
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onerror="this.onerror=null; this.src='https://huggingface.co/datasets/freddyaboulton/bucket/resolve/main/hf-logo.svg';"
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style="height: 24px; margin-right: 10px;">
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</a>
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<a href="https://gradio.app" target="_blank" rel="noopener noreferrer">
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<img src="/gradio-logo.svg"
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onerror="this.onerror=null; this.src='https://huggingface.co/datasets/freddyaboulton/bucket/resolve/main/gradio-logo.svg';"
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style="height: 24px; margin-right: 10px;">
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</a>
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<a href="https://discord.gg/TSWU7HyaYu" target="_blank" rel="noopener noreferrer">
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<img src="/Discord-Symbol-White.svg" style="height: 16px; margin-right: 10px;">
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</a>
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</div>
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<div class="md-header__source">
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<a href="https://github.com/gradio-app/fastrtc" title="Go to repository" class="md-source" data-md-component="source">
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<div class="md-source__icon md-icon">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.7.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2024 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81"/></svg>
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</div>
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<div class="md-source__repository">
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fastrtc
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</div>
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</a>
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</div>
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</nav>
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</header>
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<div class="md-container" data-md-component="container">
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<main class="md-main" data-md-component="main">
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<div class="md-main__inner md-grid">
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<div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
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<div class="md-sidebar__scrollwrap">
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<div class="md-sidebar__inner">
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<nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
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<label class="md-nav__title" for="__drawer">
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<a href="../.." title="FastRTC" class="md-nav__button md-logo" aria-label="FastRTC" data-md-component="logo">
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<img src="../../fastrtc_logo.png" alt="logo">
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</a>
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FastRTC
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</label>
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<div class="md-nav__source">
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<a href="https://github.com/gradio-app/fastrtc" title="Go to repository" class="md-source" data-md-component="source">
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<div class="md-source__icon md-icon">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.7.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2024 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81"/></svg>
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</div>
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<div class="md-source__repository">
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fastrtc
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</div>
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</a>
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</div>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../.." class="md-nav__link">
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<span class="md-ellipsis">
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Home
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--active md-nav__item--nested">
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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2" checked>
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<label class="md-nav__link" for="__nav_2" id="__nav_2_label" tabindex="0">
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<span class="md-ellipsis">
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User Guide
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_2_label" aria-expanded="true">
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<label class="md-nav__title" for="__nav_2">
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<span class="md-nav__icon md-icon"></span>
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User Guide
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../streams/" class="md-nav__link">
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<span class="md-ellipsis">
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Core Concepts
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../audio/" class="md-nav__link">
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<span class="md-ellipsis">
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Audio Streaming
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--active">
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<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
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<label class="md-nav__link md-nav__link--active" for="__toc">
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<span class="md-ellipsis">
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Video Streaming
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<a href="./" class="md-nav__link md-nav__link--active">
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<span class="md-ellipsis">
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Video Streaming
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</span>
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</a>
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
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<label class="md-nav__title" for="__toc">
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<span class="md-nav__icon md-icon"></span>
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Table of contents
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</label>
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<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="#inputoutput-streaming" class="md-nav__link">
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<span class="md-ellipsis">
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Input/Output Streaming
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#server-to-client-only" class="md-nav__link">
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<span class="md-ellipsis">
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Server-to-Client Only
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#skipping-frames" class="md-nav__link">
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<span class="md-ellipsis">
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Skipping Frames
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#setting-the-output-frame-rate" class="md-nav__link">
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<span class="md-ellipsis">
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Setting the Output Frame Rate
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</span>
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="../audio-video/" class="md-nav__link">
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<span class="md-ellipsis">
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Audio-Video Streaming
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../gradio/" class="md-nav__link">
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<span class="md-ellipsis">
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Gradio
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../api/" class="md-nav__link">
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<span class="md-ellipsis">
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API
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</span>
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="../../cookbook/" class="md-nav__link">
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<span class="md-ellipsis">
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Cookbook
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../deployment/" class="md-nav__link">
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<span class="md-ellipsis">
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Deployment
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../advanced-configuration/" class="md-nav__link">
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<span class="md-ellipsis">
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Advanced Configuration
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_6" >
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<label class="md-nav__link" for="__nav_6" id="__nav_6_label" tabindex="0">
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<span class="md-ellipsis">
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Plugin Ecosystem
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_6">
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<span class="md-nav__icon md-icon"></span>
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Plugin Ecosystem
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../../text_to_speech_gallery/" class="md-nav__link">
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<span class="md-ellipsis">
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Text-to-Speech Gallery
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../speech_to_text_gallery/" class="md-nav__link">
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<h1 id="video-streaming">Video Streaming</h1>
|
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<h2 id="inputoutput-streaming">Input/Output Streaming</h2>
|
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<p>We already saw this example in the <a href="../../#quickstart">Quickstart</a> and the <a href="../streams">Core Concepts</a> section.</p>
|
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<div class="tabbed-set tabbed-alternate" data-tabs="1:2"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">Code</label><label for="__tabbed_1_2">Notes</label></div>
|
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<div class="tabbed-content">
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<div class="tabbed-block">
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<div class="language-py highlight"><span class="filename">Input/Output Streaming</span><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="kn">from</span><span class="w"> </span><span class="nn">fastrtc</span><span class="w"> </span><span class="kn">import</span> <span class="n">Stream</span>
|
|
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="kn">import</span><span class="w"> </span><span class="nn">gradio</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">gr</span>
|
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</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a>
|
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</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="k">def</span><span class="w"> </span><span class="nf">detection</span><span class="p">(</span><span class="n">image</span><span class="p">,</span> <span class="n">conf_threshold</span><span class="o">=</span><span class="mf">0.3</span><span class="p">):</span> <span class="c1"># (1)</span>
|
|
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> <span class="n">processed_frame</span> <span class="o">=</span> <span class="n">process_frame</span><span class="p">(</span><span class="n">image</span><span class="p">,</span> <span class="n">conf_threshold</span><span class="p">)</span>
|
|
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> <span class="k">return</span> <span class="n">processed_frame</span> <span class="c1"># (2)</span>
|
|
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a>
|
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</span><span id="__span-0-8"><a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a><span class="n">stream</span> <span class="o">=</span> <span class="n">Stream</span><span class="p">(</span>
|
|
</span><span id="__span-0-9"><a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a> <span class="n">handler</span><span class="o">=</span><span class="n">detection</span><span class="p">,</span>
|
|
</span><span id="__span-0-10"><a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a> <span class="n">modality</span><span class="o">=</span><span class="s2">"video"</span><span class="p">,</span>
|
|
</span><span id="__span-0-11"><a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a> <span class="n">mode</span><span class="o">=</span><span class="s2">"send-receive"</span><span class="p">,</span> <span class="c1"># (3)</span>
|
|
</span><span id="__span-0-12"><a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a> <span class="n">additional_inputs</span><span class="o">=</span><span class="p">[</span>
|
|
</span><span id="__span-0-13"><a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a> <span class="n">gr</span><span class="o">.</span><span class="n">Slider</span><span class="p">(</span><span class="n">minimum</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">maximum</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">step</span><span class="o">=</span><span class="mf">0.01</span><span class="p">,</span> <span class="n">value</span><span class="o">=</span><span class="mf">0.3</span><span class="p">)</span>
|
|
</span><span id="__span-0-14"><a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a> <span class="p">],</span>
|
|
</span><span id="__span-0-15"><a id="__codelineno-0-15" name="__codelineno-0-15" href="#__codelineno-0-15"></a><span class="p">)</span>
|
|
</span></code></pre></div>
|
|
<ol>
|
|
<li>The webcam frame will be represented as a numpy array of shape (height, width, RGB).</li>
|
|
<li>The function must return a numpy array. It can take arbitrary values from other components.</li>
|
|
<li>Set the <code>modality="video"</code> and <code>mode="send-receive"</code></li>
|
|
</ol>
|
|
</div>
|
|
<div class="tabbed-block">
|
|
<ol>
|
|
<li>The webcam frame will be represented as a numpy array of shape (height, width, RGB).</li>
|
|
<li>The function must return a numpy array. It can take arbitrary values from other components.</li>
|
|
<li>Set the <code>modality="video"</code> and <code>mode="send-receive"</code></li>
|
|
</ol>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<h2 id="server-to-client-only">Server-to-Client Only</h2>
|
|
<p>In this case, we stream from the server to the client so we will write a generator function that yields the next frame from the video (as a numpy array)
|
|
and set the <code>mode="receive"</code> in the <code>WebRTC</code> component.</p>
|
|
<div class="tabbed-set tabbed-alternate" data-tabs="2:1"><input checked="checked" id="__tabbed_2_1" name="__tabbed_2" type="radio" /><div class="tabbed-labels"><label for="__tabbed_2_1">Code</label></div>
|
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<div class="tabbed-content">
|
|
<div class="tabbed-block">
|
|
<div class="language-py highlight"><span class="filename">Server-To-Client</span><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="kn">from</span><span class="w"> </span><span class="nn">fastrtc</span><span class="w"> </span><span class="kn">import</span> <span class="n">Stream</span>
|
|
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="kn">import</span><span class="w"> </span><span class="nn">cv2</span>
|
|
</span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a>
|
|
</span><span id="__span-1-4"><a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="k">def</span><span class="w"> </span><span class="nf">generation</span><span class="p">():</span>
|
|
</span><span id="__span-1-5"><a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a> <span class="n">url</span> <span class="o">=</span> <span class="s2">"https://download.tsi.telecom-paristech.fr/gpac/dataset/dash/uhd/mux_sources/hevcds_720p30_2M.mp4"</span>
|
|
</span><span id="__span-1-6"><a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a> <span class="n">cap</span> <span class="o">=</span> <span class="n">cv2</span><span class="o">.</span><span class="n">VideoCapture</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
|
|
</span><span id="__span-1-7"><a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a> <span class="n">iterating</span> <span class="o">=</span> <span class="kc">True</span>
|
|
</span><span id="__span-1-8"><a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a> <span class="k">while</span> <span class="n">iterating</span><span class="p">:</span>
|
|
</span><span id="__span-1-9"><a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a> <span class="n">iterating</span><span class="p">,</span> <span class="n">frame</span> <span class="o">=</span> <span class="n">cap</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
|
|
</span><span id="__span-1-10"><a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a> <span class="k">yield</span> <span class="n">frame</span>
|
|
</span><span id="__span-1-11"><a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a>
|
|
</span><span id="__span-1-12"><a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a><span class="n">stream</span> <span class="o">=</span> <span class="n">Stream</span><span class="p">(</span>
|
|
</span><span id="__span-1-13"><a id="__codelineno-1-13" name="__codelineno-1-13" href="#__codelineno-1-13"></a> <span class="n">handler</span><span class="o">=</span><span class="n">generation</span><span class="p">,</span>
|
|
</span><span id="__span-1-14"><a id="__codelineno-1-14" name="__codelineno-1-14" href="#__codelineno-1-14"></a> <span class="n">modality</span><span class="o">=</span><span class="s2">"video"</span><span class="p">,</span>
|
|
</span><span id="__span-1-15"><a id="__codelineno-1-15" name="__codelineno-1-15" href="#__codelineno-1-15"></a> <span class="n">mode</span><span class="o">=</span><span class="s2">"receive"</span>
|
|
</span><span id="__span-1-16"><a id="__codelineno-1-16" name="__codelineno-1-16" href="#__codelineno-1-16"></a><span class="p">)</span>
|
|
</span></code></pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<h2 id="skipping-frames">Skipping Frames</h2>
|
|
<p>If your event handler is not quite real-time yet, then the output feed will look very laggy.</p>
|
|
<p>To fix this, you can set the <code>skip_frames</code> parameter to <code>True</code>. This will skip the frames that are received while the event handler is still running.</p>
|
|
<div class="language-py highlight"><span class="filename">Skipping Frames</span><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="kn">import</span><span class="w"> </span><span class="nn">time</span>
|
|
</span><span id="__span-2-2"><a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a>
|
|
</span><span id="__span-2-3"><a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="kn">import</span><span class="w"> </span><span class="nn">numpy</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">np</span>
|
|
</span><span id="__span-2-4"><a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="kn">from</span><span class="w"> </span><span class="nn">fastrtc</span><span class="w"> </span><span class="kn">import</span> <span class="n">Stream</span><span class="p">,</span> <span class="n">VideoStreamHandler</span>
|
|
</span><span id="__span-2-5"><a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a>
|
|
</span><span id="__span-2-6"><a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a>
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</span><span id="__span-2-7"><a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="k">def</span><span class="w"> </span><span class="nf">process_image</span><span class="p">(</span><span class="n">image</span><span class="p">):</span>
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</span><span id="__span-2-8"><a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a> <span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span>
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</span><span id="__span-2-9"><a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a> <span class="mf">0.2</span>
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</span><span id="__span-2-10"><a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a> <span class="p">)</span> <span class="c1"># Simulating 200ms processing time per frame; input arrives faster (30 FPS).</span>
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</span><span id="__span-2-11"><a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a> <span class="k">return</span> <span class="n">np</span><span class="o">.</span><span class="n">flip</span><span class="p">(</span><span class="n">image</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>
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</span><span id="__span-2-12"><a id="__codelineno-2-12" name="__codelineno-2-12" href="#__codelineno-2-12"></a>
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</span><span id="__span-2-13"><a id="__codelineno-2-13" name="__codelineno-2-13" href="#__codelineno-2-13"></a>
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</span><span id="__span-2-14"><a id="__codelineno-2-14" name="__codelineno-2-14" href="#__codelineno-2-14"></a><span class="n">stream</span> <span class="o">=</span> <span class="n">Stream</span><span class="p">(</span>
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</span><span id="__span-2-15"><a id="__codelineno-2-15" name="__codelineno-2-15" href="#__codelineno-2-15"></a> <span class="n">handler</span><span class="o">=</span><span class="n">VideoStreamHandler</span><span class="p">(</span><span class="n">process_image</span><span class="p">,</span> <span class="n">skip_frames</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span>
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</span><span id="__span-2-16"><a id="__codelineno-2-16" name="__codelineno-2-16" href="#__codelineno-2-16"></a> <span class="n">modality</span><span class="o">=</span><span class="s2">"video"</span><span class="p">,</span>
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</span><span id="__span-2-17"><a id="__codelineno-2-17" name="__codelineno-2-17" href="#__codelineno-2-17"></a> <span class="n">mode</span><span class="o">=</span><span class="s2">"send-receive"</span><span class="p">,</span>
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</span><span id="__span-2-18"><a id="__codelineno-2-18" name="__codelineno-2-18" href="#__codelineno-2-18"></a><span class="p">)</span>
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</span><span id="__span-2-19"><a id="__codelineno-2-19" name="__codelineno-2-19" href="#__codelineno-2-19"></a>
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</span><span id="__span-2-20"><a id="__codelineno-2-20" name="__codelineno-2-20" href="#__codelineno-2-20"></a><span class="n">stream</span><span class="o">.</span><span class="n">ui</span><span class="o">.</span><span class="n">launch</span><span class="p">()</span>
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</span></code></pre></div>
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<h2 id="setting-the-output-frame-rate">Setting the Output Frame Rate</h2>
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<p>You can set the output frame rate by setting the <code>fps</code> parameter in the <code>VideoStreamHandler</code>.</p>
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<div class="language-py highlight"><span class="filename">Setting the Output Frame Rate</span><pre><span></span><code><span id="__span-3-1"><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="k">def</span><span class="w"> </span><span class="nf">generation</span><span class="p">():</span>
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</span><span id="__span-3-2"><a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a> <span class="n">url</span> <span class="o">=</span> <span class="s2">"https://github.com/user-attachments/assets/9636dc97-4fee-46bb-abb8-b92e69c08c71"</span>
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</span><span id="__span-3-3"><a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a> <span class="n">cap</span> <span class="o">=</span> <span class="n">cv2</span><span class="o">.</span><span class="n">VideoCapture</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
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</span><span id="__span-3-4"><a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a> <span class="n">iterating</span> <span class="o">=</span> <span class="kc">True</span>
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</span><span id="__span-3-5"><a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a>
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</span><span id="__span-3-6"><a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a> <span class="c1"># FPS calculation variables</span>
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</span><span id="__span-3-7"><a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a> <span class="n">frame_count</span> <span class="o">=</span> <span class="mi">0</span>
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</span><span id="__span-3-8"><a id="__codelineno-3-8" name="__codelineno-3-8" href="#__codelineno-3-8"></a> <span class="n">start_time</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span>
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</span><span id="__span-3-9"><a id="__codelineno-3-9" name="__codelineno-3-9" href="#__codelineno-3-9"></a> <span class="n">fps</span> <span class="o">=</span> <span class="mi">0</span>
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</span><span id="__span-3-10"><a id="__codelineno-3-10" name="__codelineno-3-10" href="#__codelineno-3-10"></a>
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</span><span id="__span-3-11"><a id="__codelineno-3-11" name="__codelineno-3-11" href="#__codelineno-3-11"></a> <span class="k">while</span> <span class="n">iterating</span><span class="p">:</span>
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</span><span id="__span-3-12"><a id="__codelineno-3-12" name="__codelineno-3-12" href="#__codelineno-3-12"></a> <span class="n">iterating</span><span class="p">,</span> <span class="n">frame</span> <span class="o">=</span> <span class="n">cap</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
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</span><span id="__span-3-13"><a id="__codelineno-3-13" name="__codelineno-3-13" href="#__codelineno-3-13"></a>
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</span><span id="__span-3-14"><a id="__codelineno-3-14" name="__codelineno-3-14" href="#__codelineno-3-14"></a> <span class="c1"># Calculate and print FPS</span>
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</span><span id="__span-3-15"><a id="__codelineno-3-15" name="__codelineno-3-15" href="#__codelineno-3-15"></a> <span class="n">frame_count</span> <span class="o">+=</span> <span class="mi">1</span>
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</span><span id="__span-3-16"><a id="__codelineno-3-16" name="__codelineno-3-16" href="#__codelineno-3-16"></a> <span class="n">elapsed_time</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span> <span class="o">-</span> <span class="n">start_time</span>
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</span><span id="__span-3-17"><a id="__codelineno-3-17" name="__codelineno-3-17" href="#__codelineno-3-17"></a> <span class="k">if</span> <span class="n">elapsed_time</span> <span class="o">>=</span> <span class="mf">1.0</span><span class="p">:</span> <span class="c1"># Update FPS every second</span>
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</span><span id="__span-3-18"><a id="__codelineno-3-18" name="__codelineno-3-18" href="#__codelineno-3-18"></a> <span class="n">fps</span> <span class="o">=</span> <span class="n">frame_count</span> <span class="o">/</span> <span class="n">elapsed_time</span>
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</span><span id="__span-3-19"><a id="__codelineno-3-19" name="__codelineno-3-19" href="#__codelineno-3-19"></a> <span class="k">yield</span> <span class="n">frame</span><span class="p">,</span> <span class="n">AdditionalOutputs</span><span class="p">(</span><span class="n">fps</span><span class="p">)</span>
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</span><span id="__span-3-20"><a id="__codelineno-3-20" name="__codelineno-3-20" href="#__codelineno-3-20"></a> <span class="n">frame_count</span> <span class="o">=</span> <span class="mi">0</span>
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</span><span id="__span-3-21"><a id="__codelineno-3-21" name="__codelineno-3-21" href="#__codelineno-3-21"></a> <span class="n">start_time</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span>
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</span><span id="__span-3-22"><a id="__codelineno-3-22" name="__codelineno-3-22" href="#__codelineno-3-22"></a> <span class="k">else</span><span class="p">:</span>
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</span><span id="__span-3-23"><a id="__codelineno-3-23" name="__codelineno-3-23" href="#__codelineno-3-23"></a> <span class="k">yield</span> <span class="n">frame</span>
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</span><span id="__span-3-24"><a id="__codelineno-3-24" name="__codelineno-3-24" href="#__codelineno-3-24"></a>
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</span><span id="__span-3-25"><a id="__codelineno-3-25" name="__codelineno-3-25" href="#__codelineno-3-25"></a>
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</span><span id="__span-3-26"><a id="__codelineno-3-26" name="__codelineno-3-26" href="#__codelineno-3-26"></a><span class="n">stream</span> <span class="o">=</span> <span class="n">Stream</span><span class="p">(</span>
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</span><span id="__span-3-27"><a id="__codelineno-3-27" name="__codelineno-3-27" href="#__codelineno-3-27"></a> <span class="n">handler</span><span class="o">=</span><span class="n">VideoStreamHandler</span><span class="p">(</span><span class="n">generation</span><span class="p">,</span> <span class="n">fps</span><span class="o">=</span><span class="mi">60</span><span class="p">),</span>
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</span><span id="__span-3-28"><a id="__codelineno-3-28" name="__codelineno-3-28" href="#__codelineno-3-28"></a> <span class="n">modality</span><span class="o">=</span><span class="s2">"video"</span><span class="p">,</span>
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</span><span id="__span-3-29"><a id="__codelineno-3-29" name="__codelineno-3-29" href="#__codelineno-3-29"></a> <span class="n">mode</span><span class="o">=</span><span class="s2">"receive"</span><span class="p">,</span>
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</span><span id="__span-3-30"><a id="__codelineno-3-30" name="__codelineno-3-30" href="#__codelineno-3-30"></a> <span class="n">additional_outputs</span><span class="o">=</span><span class="p">[</span><span class="n">gr</span><span class="o">.</span><span class="n">Number</span><span class="p">(</span><span class="n">label</span><span class="o">=</span><span class="s2">"FPS"</span><span class="p">)],</span>
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</span><span id="__span-3-31"><a id="__codelineno-3-31" name="__codelineno-3-31" href="#__codelineno-3-31"></a> <span class="n">additional_outputs_handler</span><span class="o">=</span><span class="k">lambda</span> <span class="n">prev</span><span class="p">,</span> <span class="n">cur</span><span class="p">:</span> <span class="n">cur</span><span class="p">,</span>
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</span><span id="__span-3-32"><a id="__codelineno-3-32" name="__codelineno-3-32" href="#__codelineno-3-32"></a><span class="p">)</span>
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</span><span id="__span-3-33"><a id="__codelineno-3-33" name="__codelineno-3-33" href="#__codelineno-3-33"></a>
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</span><span id="__span-3-34"><a id="__codelineno-3-34" name="__codelineno-3-34" href="#__codelineno-3-34"></a><span class="n">stream</span><span class="o">.</span><span class="n">ui</span><span class="o">.</span><span class="n">launch</span><span class="p">()</span>
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</span></code></pre></div>
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