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| 'use strict';
const preferredDisplaySurface = document.getElementById('displaySurface');
const replayerSurface = document.querySelector('video#replayer')
const startButton = document.getElementById('startButton');
const recordButton = document.getElementById('recordButton');
const replayerButton = document.getElementById('replayer');
const downloadButton = document.getElementById('downloadButton');
let mediaRecorder;
let isRecording = false;
let recordedBlobs = [];
replayerSurface.ariaHidden=true
if (adapter.browserDetails.browser === 'chrome' &&
adapter.browserDetails.version >= 107) {
document.getElementById('options').style.display = 'block';
} else if (adapter.browserDetails.browser === 'firefox') {
adapter.browserShim.shimGetDisplayMedia(window, 'screen');
}
if ((navigator.mediaDevices && 'getDisplayMedia' in navigator.mediaDevices)) {
startButton.disabled = false;
} else {
errorMsg('getDisplayMedia is not supported');
}
function handleSuccess(stream) {
startButton.disabled = true;
preferredDisplaySurface.disabled = true;
const video = document.querySelector('video');
video.srcObject = stream;
window.stream = stream;
stream.getVideoTracks()[0].addEventListener('ended', () => {
errorMsg('用户停止了分享屏幕');
startButton.disabled = false;
preferredDisplaySurface.disabled = false;
recordButton.disabled = true;
});
recordButton.disabled = false;
}
function handleError(error) {
errorMsg(`getDisplayMedia error: ${error.name}`, error);
}
function errorMsg(msg, error) {
const errorElement = document.querySelector('#errorMsg');
errorElement.innerHTML += `<p>${msg}</p>`;
if (typeof error !== 'undefined') {
console.error(error);
}
}
startButton.addEventListener('click', () => {
const options = {audio: true,video: {
width: 1920 ,
height: 1080,
frameRate: 15
}};
const displaySurface = preferredDisplaySurface.options[preferredDisplaySurface.selectedIndex].value;
if (displaySurface !== 'default') {
options.video = {displaySurface};
}
navigator.mediaDevices.getDisplayMedia(options)
.then(handleSuccess, handleError);
});
function getSupportedMimeTypes() {
const possibleTypes = [
'video/mp4;codecs=h264,aac',
'video/webm;codecs=vp9,opus',
'video/webm;codecs=vp8,opus',
'video/webm;codecs=h264,opus',
];
return possibleTypes.filter(mimeType => {
return MediaRecorder.isTypeSupported(mimeType);
});
}
function startRecording() {
recordedBlobs = [];
try {
mediaRecorder = new MediaRecorder(window.stream);
} catch (e) {
errorMsg(`创建MediaRecorder出错: ${JSON.stringify(e)}`);
return;
}
recordButton.textContent = '停止录制';
isRecording = true;
downloadButton.disabled = true;
mediaRecorder.onstop = (event) => {
errorMsg('录制停止了: ' + event);
};
mediaRecorder.ondataavailable = handleDataAvailable;
mediaRecorder.start();
errorMsg('录制开始 mediaRecorder: ' + mediaRecorder);
}
function handleDataAvailable(event) {
console.log('handleDataAvailable', event);
if (event.data && event.data.size > 0) {
recordedBlobs.push(event.data);
}
}
function stopRecording() {
isRecording = false;
mediaRecorder.stop();
downloadButton.disabled = false;
recordButton.textContent = "开始录制";
}
recordButton.addEventListener('click', () => {
if (isRecording == false) {
startRecording();
replayerButton.disabled = true
} else {
stopRecording();
replayerButton.disabled = false
}
});
downloadButton.addEventListener('click', () => {
const blob = new Blob(recordedBlobs, { type: 'video/mp4' });
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a');
a.style.display = 'none';
a.href = url;
a.download = '录屏_' + new Date().getTime() + '.mp4';
document.body.appendChild(a);
a.click();
setTimeout(() => {
document.body.removeChild(a);
window.URL.revokeObjectURL(url);
}, 100);
});
replayerButton.onclick = () => {
replayerSurface.disabled = true;
var blob = new Blob(recordedBlobs, { type: 'video/webm' })
replayerSurface.src = window.URL.createObjectURL(blob)
replayerSurface.srcObject = null
replayerSurface.controls = true
replayerSurface.play()
}
|
