|
let mediaRecorder;
let recordedBlobs;
const recordedVideo = document.querySelector('video#recorded');
const recordButton = document.querySelector('button#record');
recordButton.addEventListener('click', () => {
if (recordButton.textContent === '开始记录') {
startRecording();
} else {
stopRecording();
recordButton.textContent = '开始记录';
playButton.disabled = false;
}
});
const playButton = document.querySelector('button#play');
playButton.addEventListener('click', () => {
const superBuffer = new Blob(recordedBlobs, { type: 'video/webm' });
recordedVideo.src = null;
recordedVideo.srcObject = null;
recordedVideo.src = window.URL.createObjectURL(superBuffer);
recordedVideo.controls = true;
recordedVideo.play();
});
function handleDataAvailable(event) {
if (event.data && event.data.size > 0) {
recordedBlobs.push(event.data);
}
}
function startRecording() {
recordedBlobs = [];
try {
mediaRecorder = new MediaRecorder(window.stream);
} catch (e) {
console.error('创建MediaRecorder时异常:', e);
}
recordButton.textContent = '停止记录';
playButton.disabled = true;
mediaRecorder.ondataavailable = handleDataAvailable;
mediaRecorder.start();
}
function stopRecording() {
mediaRecorder.stop();
}
function handleSuccess(stream) {
recordButton.disabled = false;
window.stream = stream;
const gumVideo = document.querySelector('video#gum');
gumVideo.srcObject = stream;
}
async function init(constraints) {
try {
const stream = await navigator.mediaDevices.getUserMedia(constraints);
handleSuccess(stream);
} catch (e) {
console.error('navigator.getUserMedia error:', e);
}
}
document.querySelector('button#start').addEventListener('click', async () => {
document.querySelector('button#start').disabled = true;
const constraints = {
audio: {},
video: {
width: 1280, height: 720
}
};
await init(constraints);
});
|
