我使用了链接(这里)的信息，并得到了以下代码，这有助于我用我的网络摄像头录制视频。这个代码可以让我录制视频，并提供下载。但是，我想将录制的视频自动保存到本地文件夹。我该怎么做呢?
<script src="https://cdn.webrtc-experiment.com/RecordRTC.js"></script>
<section class="experiment">
<div class="inner">
<button style="float: right;" id="fit-to-screen">Fit to Screen!</button>
<label for="canvas-width-input">Canvas Width</label>
<input type="text" id="canvas-width-input" value="320">
<br />
<label for="canvas-height-input">Canvas Height</label>
<input type="text" id="canvas-height-input" value="240">
<br />
<div>
<button id="record-video">Record</button>
<button id="pause-resume-video" disabled>Pause</button>
<button id="stop-recording-video" disabled>Stop</button>
<hr>
<h2 id="video-url-preview"></h2>
<br>
<input type="checkbox" id="record-screen" style="width:auto;">
<label for="record-screen">Record Screen</label>
<br>
<video id="video" autoplay loop controls muted></video>
</div>
</div>
</section>
<script>
(function() {
var params = {},
r = /([^&=]+)=?([^&]*)/g;
function d(s) {
return decodeURIComponent(s.replace(/+/g, ' '));
}
var match, search = window.location.search;
while (match = r.exec(search.substring(1)))
params[d(match[1])] = d(match[2]);
window.params = params;
})();
</script>
<script>
function getByID(id) {
return document.getElementById(id);
}
var recordVideo = getByID('record-video'),
pauseResumeVideo = getByID('pause-resume-video'),
stopRecordingVideo = getByID('stop-recording-video');
var canvasWidth_input = getByID('canvas-width-input'),
canvasHeight_input = getByID('canvas-height-input');
if(params.canvas_width) {
canvasWidth_input.value = params.canvas_width;
}
if(params.canvas_height) {
canvasHeight_input.value = params.canvas_height;
}
var video = getByID('video');
var videoConstraints = {
audio: false,
video: {
mandatory: {},
optional: []
}
};
</script>
<script>
var screen_constraints;
function isCaptureScreen(callback) {
if (document.getElementById('record-screen').checked) {
document.getElementById('fit-to-screen').onclick();
getScreenId(function (error, sourceId, _screen_constraints) {
if(error === 'not-installed') {
window.open('https://chrome.google.com/webstore/detail/screen-capturing/ajhifddimkapgcifgcodmmfdlknahffk');
}
if(error === 'permission-denied') {
alert('Screen capturing permission is denied.');
}
if(error === 'installed-disabled') {
alert('Please enable chrome screen capturing extension.');
}
if(_screen_constraints) {
screen_constraints = _screen_constraints.video;
videoConstraints = _screen_constraints;
}
else {
videoConstraints = screen_constraints;
}
callback();
});
}
else {
callback();
}
}
recordVideo.onclick = function() {
isCaptureScreen(function() {
recordVideoOrGIF(true);
});
};
function recordVideoOrGIF(isRecordVideo) {
navigator.getUserMedia(videoConstraints, function(stream) {
video.onloadedmetadata = function() {
video.width = canvasWidth_input.value || 320;
video.height = canvasHeight_input.value || 240;
var options = {
type: isRecordVideo ? 'video' : 'gif',
video: video,
canvas: {
width: canvasWidth_input.value,
height: canvasHeight_input.value
},
disableLogs: params.disableLogs || false,
recorderType: null // to let RecordRTC choose relevant types itself
};
recorder = window.RecordRTC(stream, options);
recorder.startRecording();
video.onloadedmetadata = false;
};
video.src = URL.createObjectURL(stream);
}, function() {
if (document.getElementById('record-screen').checked) {
if (location.protocol === 'http:')
alert('<https> is mandatory to capture screen.');
else
alert('Multi-capturing of screen is not allowed. Capturing process is denied. Are you enabled flag: "Enable screen capture support in getUserMedia"?');
} else
alert('Webcam access is denied.');
});
window.isAudio = false;
if (isRecordVideo) {
recordVideo.disabled = true;
stopRecordingVideo.disabled = false;
pauseResumeVideo.disabled = false;
}
}
stopRecordingVideo.onclick = function() {
this.disabled = true;
recordVideo.disabled = false;
if (recorder)
recorder.stopRecording(function(url) {
video.src = url;
video.play();
document.getElementById('video-url-preview').innerHTML = '<a href="' + url + '" target="_blank">Recorded Video URL</a>';
});
};
</script>
<script>
document.getElementById('fit-to-screen').onclick = function() {
this.disabled = true;
video.width = canvasWidth_input.value = innerWidth;
video.height = canvasHeight_input.value = innerHeight;
};
</script>
您必须使用recorder.getBlob()方法来获取视频文件的实际blob，然后将其发送到服务器，然后将其保存到文件:
stopRecordingVideo.onclick = function() {
this.disabled = true;
recordVideo.disabled = false;
if (recorder)
recorder.stopRecording(function(url) {
video.src = url;
video.play();
var recordedBlob = recorder.getBlob();
var formData = new FormData();
formData.append("videofile", recordedBlob);
var xhr = new XMLHttpRequest();
xhr.open("POST", "savevideofile.php");
xhr.send(formData);
document.getElementById('video-url-preview').innerHTML = '<a href="' + url + '>Recorded Video URL</a>';
});
};
savevideofile.php:
<?php
if($_FILES['videofile']){
$my_file = $_FILES['videofile'];
$my_blob = file_get_contents($my_file['tmp_name']);
file_put_contents('/path/to/your/file.webm', $my_blob);
}
?>
查看您链接的网页的源代码后，从stopRecording回调的'url'应该是一个可下载的url。
你所要做的就是把这个URL用在HTML5 download属性的锚中，就像这样:
recorder.stopRecording(function(url) {
video.src = url;
video.play();
document.getElementById('video-url-preview').innerHTML = '<a href="' + url + '" target="_blank" download="myVideo.mp4">Recorded Video URL</a>';
});