Electron采集桌面共享和系统音频(桌面捕获)实例

const { app, BrowserWindow, desktopCapturer, ipcMain } = require('electron')
const path = require('path')
let win = null;
function createWindow () {
  win = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js')
    }
  })
  win.loadFile('index.html')
}
app.whenReady().then(() => {
  createWindow()
  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow()
    }
  })
})
app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

// .... other code 
ipcMain.handle('getSources', async () => {
  return await desktopCapturer.getSources({ types: ['window', 'screen'] })
})

// .... other codes
const inputSources = await ipcRenderer.invoke('getSources')
// ... other codes

// ...
// other Code 
 let constraints = {
      audio: {
        mandatory: {
          chromeMediaSource: 'desktop'
        }
      },
      video: {
        mandatory: {
          chromeMediaSource: 'desktop',
          chromeMediaSourceId: sourceId
        }
      }
    }
    const stream = await navigator.mediaDevices
      .getUserMedia(constraints);
      handleStream(stream);
function handleStream (stream) {
    const video = document.querySelector('video')
    video.srcObject = stream
    video.onloadedmetadata = (e) => video.play()
  }
// ...
// other code