desktopCapturer
Access information about media sources that can be used to capture audio and video from the desktop using the
navigator.mediaDevices.getUserMediaAPI.
Process: Main
O exemplo a seguir mostra como capturar vídeo de uma janela desktop com o título Electron:
// main.js
const { app, BrowserWindow, desktopCapturer, session } = require('electron')
app.whenReady().then(() => {
const mainWindow = new BrowserWindow()
session.defaultSession.setDisplayMediaRequestHandler((request, callback) => {
desktopCapturer.getSources({ types: ['screen'] }).then((sources) => {
// Grant access to the first screen found.
callback({ video: sources[0], audio: 'loopback' })
})
// If true, use the system picker if available.
// Note: this is currently experimental. If the system picker
// is available, it will be used and the media request handler
// will not be invoked.
}, { useSystemPicker: true })
mainWindow.loadFile('index.html')
})
// renderer.js
const startButton = document.getElementById('startButton')
const stopButton = document.getElementById('stopButton')
const video = document.querySelector('video')
startButton.addEventListener('click', () => {
navigator.mediaDevices.getDisplayMedia({
audio: true,
video: {
width: 320,
height: 240,
frameRate: 30
}
}).then(stream => {
video.srcObject = stream
video.onloadedmetadata = (e) => video.play()
}).catch(e => console.log(e))
})
stopButton.addEventListener('click', () => {
video.pause()
})
<!-- index.html -->
<html>
<meta http-equiv="content-security-policy" content="script-src 'self' 'unsafe-inline'" />
<body>
<button id="startButton" class="button">Start</button>
<button id="stopButton" class="button">Stop</button>