# react-webcam [![Build Status][build-badge]][build] ![downloads][downloads-badge]

**DEMO:** https://codepen.io/mozmorris/pen/JLZdoP https://www.npmjs.com/package/react-webcam Webcam component for React. See [http://caniuse.com/#feat=stream](http://caniuse.com/#feat=stream) for browser compatibility. **Note: Browsers will throw an error if the page is loaded from insecure origin. I.e. Use https.** ## Installation ```shell # with npm npm install react-webcam # with yarn yarn add react-webcam ``` ## Demo https://codepen.io/mozmorris/pen/JLZdoP ## Usage ```jsx import React from "react"; import Webcam from "react-webcam"; const WebcamComponent = () => ; ``` ### Props The props here are specific to this component but one can pass any prop to the underlying video tag eg `className`, `style`, `muted`, etc | prop | type | default | notes | |---------------------------|----------|--------------|-----------------------------------------------------------------------------------------| | audio | boolean | false | enable/disable audio | | audioConstraints | object | | MediaStreamConstraint(s) for the audio | | disablePictureInPicture | boolean | false | disable Picture-in-Picture | | forceScreenshotSourceSize | boolean | false | uses size of underlying source video stream (and thus ignores other size related props) | | imageSmoothing | boolean | true | pixel smoothing of the screenshot taken | | mirrored | boolean | false | show camera preview and get the screenshot mirrored | | minScreenshotHeight | number | | min height of screenshot | | minScreenshotWidth | number | | min width of screenshot | | onUserMedia | function | noop | callback for when component receives a media stream | | onUserMediaError | function | noop | callback for when component can't receive a media stream with MediaStreamError param | | screenshotFormat | string | 'image/webp' | format of screenshot | | screenshotQuality | number | 0.92 | quality of screenshot(0 to 1) | | videoConstraints | object | | MediaStreamConstraints(s) for the video | ### Methods `getScreenshot` - Returns a base64 encoded string of the current webcam image. Example: [https://codepen.io/mozmorris/pen/gOOoqpw](https://codepen.io/mozmorris/pen/gOOoqpw) You may also pass in an optional `dimensions` object: ``` getScreenshot({width: 1920, height: 1080}); ``` ### The Constraints We can build a constraints object by passing it to the videoConstraints prop. This gets passed into getUserMedia method. Please take a look at the MDN docs to get an understanding how this works. https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia https://developer.mozilla.org/en-US/docs/Web/API/Media_Streams_API/Constraints As an example take a look at this [CodePen demo https://codepen.io/mozmorris/pen/GRpEQwK?editors=0010](https://codepen.io/mozmorris/pen/GRpEQwK?editors=0010) which shows how to build a custom aspect ratio for the video. ## Screenshot (via render props) ```jsx const videoConstraints = { width: 1280, height: 720, facingMode: "user" }; const WebcamCapture = () => ( {({ getScreenshot }) => ( )} ); ``` ## Screenshot (via ref) ```jsx const videoConstraints = { width: 1280, height: 720, facingMode: "user" }; const WebcamCapture = () => { const webcamRef = React.useRef(null); const capture = React.useCallback( () => { const imageSrc = webcamRef.current.getScreenshot(); }, [webcamRef] ); return ( <> ); }; ``` ## Capturing video It is posible to capture video with `` using the [MediaStream Recording API](https://developer.mozilla.org/en-US/docs/Web/API/MediaStream_Recording_API). You can find an example [https://codepen.io/mozmorris/pen/yLYKzyp?editors=0010](https://codepen.io/mozmorris/pen/yLYKzyp?editors=0010). ## Choosing a camera ### User/Selfie/forward facing camera ```jsx class WebcamCapture extends React.Component { render() { const videoConstraints = { facingMode: "user" }; return ; } } ``` ### Environment/Facing-Out camera ```jsx class WebcamCapture extends React.Component { render() { const videoConstraints = { facingMode: { exact: "environment" } }; return ; } } ``` For more information on `facingMode`, please see the MDN web docs [https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/facingMode](https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/facingMode) ## Show all cameras by deviceId ```jsx const WebcamCapture = () => { const [deviceId, setDeviceId] = React.useState({}); const [devices, setDevices] = React.useState([]); const handleDevices = React.useCallback( mediaDevices => setDevices(mediaDevices.filter(({ kind }) => kind === "videoinput")), [setDevices] ); React.useEffect( () => { navigator.mediaDevices.enumerateDevices().then(handleDevices); }, [handleDevices] ); return ( <> {devices.map((device, key) => (

{device.label || `Device ${key + 1}`}

))} ); }; ``` ## Recording a stream https://codepen.io/mozmorris/pen/yLYKzyp?editors=0011 ## Using within an iframe The Webcam component will fail to load when used inside a cross-origin iframe in newer version of Chrome (> 64). In order to overcome this security restriction a special `allow` attribute needs to be added to the iframe tag specifying `microphone` and `camera` as the required permissions like in the below example: ```html

パッケージ	ダウンロード数	Stars	サイズ	Issues	公開日時	ライセンス

react-webcam	277,102	1,723	168 kB	66	2年前	MIT