{"id":3557,"date":"2018-10-24T12:30:00","date_gmt":"2018-10-24T12:30:00","guid":{"rendered":"https:\/\/www.codexworld.com\/?p=3557"},"modified":"2022-11-13T06:19:23","modified_gmt":"2022-11-13T06:19:23","slug":"access-webcam-capture-image-take-picture-html5-javascript","status":"publish","type":"post","link":"https:\/\/www.codexworld.com\/access-webcam-capture-image-take-picture-html5-javascript\/","title":{"rendered":"Access Webcam and Capture Image from Video with HTML5 using JavaScript"},"content":{"rendered":"<p>A webcam is used to steam the video in real-time through the computer. The video stream can view, save, and share through the network. Generally, the software is used to access webcam and stream video in the device. You can use JavaScript API to <b>steam webcam video<\/b> on the webpage without any third-party software.<\/p>\n<p>The <b>getUserMedia()<\/b> method in HTML5, helps to display a preview of the webcam video using JavaScript. If your web application needs to access webcam and stream video, you can easily do it with HTML5 and JavaScript. In this tutorial, we will show you how to access the webcam, streaming the video, and capture the image of the video using <b>HTML5 and JavaScript<\/b>.<\/p>\n<h2>getUserMedia() API<\/h2>\n<p>The getUserMedia() method of MediaDevices API helps to produce a MediaStream containing the requested media types. You can use getUserMedia() API to prompt dialog to get permission from the user and <b>stream webcam video using HTML5<\/b>.<\/p>\n<p>In this example code, we will use getUserMedia() method to <b>preview webcam video with HTML5<\/b> and take picture from webcam with HTML5 using JavaScript.<\/p>\n<h2>HTML Code<\/h2>\n<p>The following HTML embeds the video element and draws the image on the webpage.<\/p>\n<ul class=\"bullet_disk_list\">\n<li>The HTML5 <span style=\"color: rgb(186, 98, 54);\">&lt;<span style=\"color: rgb(186, 98, 54);\">video<\/span>&gt;<\/span> element is used to embed a video in a webpage.<\/li>\n<li>The HTML <span style=\"color: rgb(186, 98, 54);\">&lt;<span style=\"color: rgb(186, 98, 54);\">canvas<\/span>&gt;<\/span> element is used to draw a snapshot of the webcam video on a webpage.<\/li>\n<li>The button (<code>#snap<\/code>) trigger the canvas API to generate an image of the video.<\/li>\n<\/ul>\n<pre style=\"color: rgb(95, 94, 78);\"><span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">p<\/span>&gt;<\/span><span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">span<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"errorMsg\"<\/span>&gt;<\/span><span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">span<\/span>&gt;<\/span><span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">p<\/span>&gt;<\/span>\r\n    \r\n<span class=\"hljs-comment\" style=\"color: rgb(108, 107, 90);\">&lt;!-- Stream video via webcam --&gt;<\/span>\r\n<span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">div<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"video-wrap\"<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">video<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"video\"<\/span> <span class=\"hljs-attr\">playsinline<\/span> <span class=\"hljs-attr\">autoplay<\/span>&gt;<\/span><span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">video<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">div<\/span>&gt;<\/span>\r\n\r\n<span class=\"hljs-comment\" style=\"color: rgb(108, 107, 90);\">&lt;!-- Trigger canvas web API --&gt;<\/span>\r\n<span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">div<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"controller\"<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">button<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"snap\"<\/span>&gt;<\/span>Capture<span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">button<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">div<\/span>&gt;<\/span>\r\n\r\n<span class=\"hljs-comment\" style=\"color: rgb(108, 107, 90);\">&lt;!-- Webcam video snapshot --&gt;<\/span>\r\n<span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">canvas<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"canvas\"<\/span> <span class=\"hljs-attr\">width<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"640\"<\/span> <span class=\"hljs-attr\">height<\/span>=<span class=\"hljs-string\" style=\"color: rgb(125, 151, 38);\">\"480\"<\/span>&gt;<\/span><span class=\"hljs-tag\" style=\"color: rgb(186, 98, 54);\">&lt;\/<span class=\"hljs-name\" style=\"color: rgb(186, 98, 54);\">canvas<\/span>&gt;<\/span><\/pre>\n<h2>JavaScript Code<\/h2>\n<p>The following JavaScript handles the video streaming process via webcam on the webpage.<\/p>\n<ul class=\"bullet_disk_list\">\n<li>The constraints define the width and height of the video.<\/li>\n<li>The <code>init()<\/code> function initialize the <b>getUserMedia() API<\/b>.<\/li>\n<li>The <code>handleSuccess()<\/code> function stream the webcam video in the HTML element.<\/li>\n<li>The <b>canvas API<\/b> is used to draw graphics from the webcam stream. It helps to capture still picture from webcam video.<\/li>\n<\/ul>\n<pre style=\"color: rgb(110, 107, 94);\"><span class=\"hljs-meta\" style=\"color: rgb(182, 86, 17);\">'use strict'<\/span>;\r\n\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">const<\/span> video = <span class=\"hljs-built_in\" style=\"color: rgb(182, 86, 17);\">document<\/span>.getElementById(<span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">'video'<\/span>);\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">const<\/span> canvas = <span class=\"hljs-built_in\" style=\"color: rgb(182, 86, 17);\">document<\/span>.getElementById(<span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">'canvas'<\/span>);\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">const<\/span> snap = <span class=\"hljs-built_in\" style=\"color: rgb(182, 86, 17);\">document<\/span>.getElementById(<span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">\"snap\"<\/span>);\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">const<\/span> errorMsgElement = <span class=\"hljs-built_in\" style=\"color: rgb(182, 86, 17);\">document<\/span>.querySelector(<span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">'span#errorMsg'<\/span>);\r\n\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">const<\/span> constraints = {\r\n    audio: <span class=\"hljs-literal\" style=\"color: rgb(182, 86, 17);\">true<\/span>,\r\n    video: {\r\n        width: <span class=\"hljs-number\" style=\"color: rgb(182, 86, 17);\">1280<\/span>, height: <span class=\"hljs-number\" style=\"color: rgb(182, 86, 17);\">720<\/span>\r\n    }\r\n};\r\n\r\n<span class=\"hljs-comment\" style=\"color: rgb(125, 122, 104);\">\/\/ Access webcam<\/span>\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">async<\/span> <span class=\"hljs-function\"><span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">function<\/span> <span class=\"hljs-title\" style=\"color: rgb(102, 132, 225);\">init<\/span>(<span class=\"hljs-params\" style=\"color: rgb(182, 86, 17);\"><\/span>) <\/span>{\r\n    <span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">try<\/span> {\r\n        <span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">const<\/span> stream = <span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">await<\/span> navigator.mediaDevices.getUserMedia(constraints);\r\n        handleSuccess(stream);\r\n    } <span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">catch<\/span> (e) {\r\n        errorMsgElement.innerHTML = <span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">`navigator.getUserMedia error:<span class=\"hljs-subst\">${e.toString()}<\/span>`<\/span>;\r\n    }\r\n}\r\n\r\n<span class=\"hljs-comment\" style=\"color: rgb(125, 122, 104);\">\/\/ Success<\/span>\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">function<\/span> <span class=\"hljs-title\" style=\"color: rgb(102, 132, 225);\">handleSuccess<\/span>(<span class=\"hljs-params\" style=\"color: rgb(182, 86, 17);\">stream<\/span>) <\/span>{\r\n    <span class=\"hljs-built_in\" style=\"color: rgb(182, 86, 17);\">window<\/span>.stream = stream;\r\n    video.srcObject = stream;\r\n}\r\n\r\n<span class=\"hljs-comment\" style=\"color: rgb(125, 122, 104);\">\/\/ Load init<\/span>\r\ninit();\r\n\r\n<span class=\"hljs-comment\" style=\"color: rgb(125, 122, 104);\">\/\/ Draw image<\/span>\r\n<span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">var<\/span> context = canvas.getContext(<span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">'2d'<\/span>);\r\nsnap.addEventListener(<span class=\"hljs-string\" style=\"color: rgb(96, 172, 57);\">\"click\"<\/span>, <span class=\"hljs-function\"><span class=\"hljs-keyword\" style=\"color: rgb(184, 84, 212);\">function<\/span>(<span class=\"hljs-params\" style=\"color: rgb(182, 86, 17);\"><\/span>) <\/span>{\r\n    context.drawImage(video, <span class=\"hljs-number\" style=\"color: rgb(182, 86, 17);\">0<\/span>, <span class=\"hljs-number\" style=\"color: rgb(182, 86, 17);\">0<\/span>, <span class=\"hljs-number\" style=\"color: rgb(182, 86, 17);\">640<\/span>, <span class=\"hljs-number\" style=\"color: rgb(182, 86, 17);\">480<\/span>);\r\n});<\/pre>\n<p class=\"seeAlso\"><span><\/span><a href=\"https:\/\/www.codexworld.com\/build-html5-video-player-custom-controls\/\">Build a HTML5 Video Player with Custom Controls<\/a><\/span><\/p>\n<h2>Conclusion<\/h2>\n<p>Using getUserMedia API, you can access the computer&#8217;s web camera through web browsers. Once you got access to the webcam, you can stream, save, and download the video. Here we have provided the example script to access the webcam, stream video, and capture a snapshot of the streaming video. You can easily implement the webcam video streaming functionality on the website without any software or plugins. The functionality of this example script can be enhanced easily as per your needs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A webcam is used to steam the video in real-time through the computer. The video stream can view, save, and share through the network. Generally, the software is used to access webcam and stream video <\/p>\n","protected":false},"author":1,"featured_media":3559,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[163],"tags":[250,102,66,340],"class_list":["post-3557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-html5","tag-api","tag-html5","tag-javascript","tag-video","cat-163-id","has_thumb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Access Webcam and Capture Image from Video with HTML5 using JavaScript - CodexWorld<\/title>\n<meta name=\"description\" content=\"Webcam preview with HTML5 - Access webcam and capture snapshot using getUserMedia() method of MediaDevices API. 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