录制用户的音频，视屏 navigator.mediaDevices.getUserMedia
获取本地的音频
<input type="file" accept="audio/*" capture="microphone" id="recorder">
<audio id="player" controls></audio>
<script>
var recorder = document.getElementById('recorder');
var player = document.getElementById('player')
recorder.addEventListener('change', function (e) {
var file = e.target.files[0];
// Do something with the audio file.
player.src = URL.createObjectURL(file);
});
</script>
获取麦克风声音
声音极小
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
a,
button {
border: 0;
background-color: #448aff21;
text-decoration: none;
padding: 10px;
border-radius: 2px;
color: #448aff !important;
}
</style>
</head>
<body style="margin-top: 20px;">
<a id="download">Download</a>
<button id="start">Start</button>
<button id="stop">Stop</button>
<script>
let l = console.log
navigator.permissions.query({
name: 'microphone'
}).then(function (result) {
if (result.state == 'granted') { // 用户之前已授予对麦克风的访问权
l('ok')
} else if (result.state == 'prompt') { // 用户尚未授予访问权，调用 getUserMedia 时将会收到提示
l('ready')
} else if (result.state == 'denied') { // 系统或用户已显式屏蔽对麦克风的访问权，您将无法获得对其的访问权
l('...')
}
result.onchange = function () {
l('change..')
};
});
const downloadLink = document.getElementById('download');
const stopButton = document.getElementById('stop');
const startButton = document.getElementById('start');
navigator.mediaDevices.getUserMedia({
audio: true,
video: false
})
.then(stream => {
stopButton.addEventListener('click', e => {
mediaRecorder.stop();
})
startButton.addEventListener('click', e => {
mediaRecorder.start();
})
const recordedChunks = [];
const mediaRecorder = new MediaRecorder(stream);
mediaRecorder.addEventListener('dataavailable', function (e) {
if (e.data.size > 0) {
recordedChunks.push(e.data);
}
});
mediaRecorder.addEventListener('stop', function () {
l('暂停')
downloadLink.href = URL.createObjectURL(new Blob(recordedChunks));
downloadLink.download = 'acetest.wav';
});
mediaRecorder.addEventListener('start', e => {
l('开始')
})
});
</script>
</body>
镶嵌在 audio元素里面
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
a,
button {
border: 0;
background-color: #448aff21;
text-decoration: none;
padding: 10px;
border-radius: 2px;
color: #448aff !important;
}
</style>
</head>
<body style="margin-top: 20px;">
<button id="start">Start</button>
<button id="stop">Stop</button>
<div>
<audio id="audio" controls></audio>
</div>
<script>
let l = console.log
const stopButton = document.getElementById('stop');
const startButton = document.getElementById('start');
navigator.mediaDevices.getUserMedia({
audio: true,
// video: true
})
.then(stream => {
stopButton.addEventListener('click', e => {
mediaRecorder.stop();
})
startButton.addEventListener('click', e => {
mediaRecorder.start();
})
const recordedChunks = [];
const mediaRecorder = new MediaRecorder(stream);
mediaRecorder.addEventListener('dataavailable', function (e) {
if (e.data.size > 0) {
recordedChunks.push(e.data);
}
});
mediaRecorder.addEventListener('stop', function () {
l('暂停')
var audio = document.getElementById('audio');
audio.src = URL.createObjectURL(new Blob(recordedChunks));
audio.play();
});
mediaRecorder.addEventListener('start', e => {
l('开始')
})
});
</script>
</body>
录制视频 github地址
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<style>
a,
button {
border: 0;
background-color: #448aff21;
text-decoration: none;
padding: 10px;
border-radius: 2px;
color: #448aff !important;
}
</style>
</head>
<body style="margin-top: 20px;">
<button id="start">Start</button> <button id="stop">Stop</button>
<div>
<p>live. <span class="timer"></span></p>
<video
width="600"
id="live"
style="box-sizing: border-box; border: 4px solid #f48"
></video>
</div>
<script>
let l = console.log;
let n = 0;
let mediaRecorder;
let timer;
const stopButton = document.getElementById("stop");
const startButton = document.getElementById("start");
navigator.mediaDevices
.getUserMedia({
audio: true,
video: true,
})
.then(stream => {
let liveVideo = document.getElementById("live");
// liveVideo.src = URL.createObjectURL(stream); // 你会看到一些警告
liveVideo.srcObject = stream;
liveVideo.play();
stopButton.addEventListener("click", stopLive);
startButton.addEventListener("click", e => {
startLive(stream);
});
});
// 显示录制的秒数
function logger() {
const timerEl = document.querySelector(".timer");
timer = setInterval(() => {
n += 1;
timerEl.textContent = `${n}s`;
}, 1000);
}
// 暂停后下载视频
function downLoadVideo(chunks) {
let downloadLink = document.createElement("a");
downloadLink.href = URL.createObjectURL(
new Blob(chunks, {
type: "application/video",
})
);
// downloadLink.download = 'live.webm';
downloadLink.download = "live.ogg";
// downloadLink.download = 'live.mp4';
downloadLink.click();
}
// 结束录制
function stopLive() {
clearInterval(timer);
n = 0;
if (mediaRecorder) {
mediaRecorder.stop();
} else {
alert("还没有开始。");
}
}
function startLive(stream) {
logger();
let recordedChunks = [];
mediaRecorder = new MediaRecorder(stream);
mediaRecorder.start();
mediaRecorder.addEventListener("dataavailable", function(e) {
if (e.data.size > 0) recordedChunks.push(e.data);
});
mediaRecorder.addEventListener("stop", function() {
l("暂停 自动下载");
downLoadVideo(recordedChunks);
});
mediaRecorder.addEventListener("start", e => {
l("开始 录制");
});
}
</script>
</body>
</html>
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