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Electron：摄像头录制和屏幕录制

news 2025/6/29 15:56:20

摄像头录制

main.js

const { app, BrowserWindow} = require('electron')let mainWin = null
const createWindow = () => {mainWin = new BrowserWindow({width: 800,height: 600,title: '自定义菜单',webPreferences: {// 允许渲染进程使用nodejsnodeIntegration: true,// 允许渲染进程使用nodejscontextIsolation: false,}})mainWin.loadFile('index.html')mainWin.webContents.openDevTools()
}app.whenReady().then(() => {createWindow()app.on('activate', () => {if (BrowserWindow.getAllWindows().length === 0) {createWindow()}})
})app.on('window-all-closed', () => {if (process.platform !== 'darwin') {app.quit()}
})

index.html

<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title></title>
</head><body><button id="openCamera">打开摄像头</button><button id="start">开始录制</button><button id="stop">停止录制</button><button id="play">播放</button><video src="" id="originVideo"></video><video src="" id="playVideo" width="400" height="500"></video><script>const openCamera = document.querySelector("#openCamera")const start = document.querySelector("#start")const stop = document.querySelector("#stop")const play = document.querySelector("#play")const originVideo = document.querySelector("#originVideo")const playVideo = document.querySelector("#playVideo")let stream;let blobData = []let recordInstance;openCamera.addEventListener("click", () => {handleOpenCamera()})start.addEventListener("click", () => {startRecord()})stop.addEventListener("click", () => {recordInstance && recordInstance.stop()})play.addEventListener("click", () => {const blob = new Blob(blobData, { type: 'video/mp4' })const videoUrl = URL.createObjectURL(blob)playVideo.src = videoUrl;playVideo.play()})// 打开摄像头const handleOpenCamera = async () => {stream = await navigator.mediaDevices.getUserMedia({video: {width: 400, height: 500},audio: true})console.log("handleOpenCamera stream", stream);originVideo.srcObject = streamoriginVideo.play()}//开始录制const startRecord = () => {recordInstance = new MediaRecorder(stream, { mimeType: 'video/webm' })console.log("startRecord stream", stream);if (recordInstance) {recordInstance.start()recordInstance.ondataavailable = function (e) {blobData.push(e.data)}recordInstance.onstop = function (e) {console.log("startRecord onstop");}}}</script></body></html>

屏幕录制

在这里插入图片描述

main.js

const { app, BrowserWindow, desktopCapturer, session } = require('electron')let mainWin = null
const createWindow = () => {mainWin = new BrowserWindow({width: 1000,height: 800,title: '自定义菜单',webPreferences: {// 允许渲染进程使用nodejsnodeIntegration: true,// 允许渲染进程使用nodejscontextIsolation: false,}})session.defaultSession.setDisplayMediaRequestHandler((request, callback) => {desktopCapturer.getSources({ types: ['screen'] }).then((sources) => {// Grant access to the first screen found.callback({ video: sources[0], audio: 'loopback' })})})mainWin.loadFile('index.html')mainWin.webContents.openDevTools()
}app.whenReady().then(() => {createWindow()app.on('activate', () => {if (BrowserWindow.getAllWindows().length === 0) {createWindow()}})
})app.on('window-all-closed', () => {if (process.platform !== 'darwin') {app.quit()}
})

index.html

<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title></title>
</head><body><button id="openCamera">打开摄像头</button><button id="screenRecord">屏幕录制</button><button id="start">开始录制</button><button id="stop">停止录制</button><button id="play">播放录制的视频</button><video src="" id="originVideo"></video><video src="" id="playVideo" width="400" height="500"></video><script>const openCamera = document.querySelector("#openCamera")const screenRecord = document.querySelector("#screenRecord")const start = document.querySelector("#start")const stop = document.querySelector("#stop")const play = document.querySelector("#play")const originVideo = document.querySelector("#originVideo")const playVideo = document.querySelector("#playVideo")let stream;let blobData = []let recordInstance;// 打开摄像头openCamera.addEventListener("click", () => {handleOpenCamera()})// 屏幕录制screenRecord.addEventListener("click", () => {handleScreenRecord()})// 开始录制start.addEventListener("click", () => {startRecord()})// 停止录制stop.addEventListener("click", () => {recordInstance && recordInstance.stop()})// 播放录制的视频play.addEventListener("click", () => {const blob = new Blob(blobData, { type: 'video/mp4' })const videoUrl = URL.createObjectURL(blob)playVideo.src = videoUrl;playVideo.play()})// 打开摄像头const handleOpenCamera = async () => {stream = await navigator.mediaDevices.getUserMedia({video: {width: 400, height: 500},audio: true})console.log("handleOpenCamera stream", stream);originVideo.srcObject = streamoriginVideo.play()}// 屏幕录制const handleScreenRecord = async () => {stream = await navigator.mediaDevices.getDisplayMedia({video: {width: 400, height: 500},// video: true,audio: true})console.log("handlescreenRecord stream", stream);originVideo.srcObject = streamoriginVideo.play()}//开始录制const startRecord = () => {recordInstance = new MediaRecorder(stream, { mimeType: 'video/webm' })console.log("startRecord stream", stream);if (recordInstance) {recordInstance.start()recordInstance.ondataavailable = function (e) {blobData.push(e.data)}recordInstance.onstop = function (e) {console.log("startRecord onstop");}}}</script></body></html>