当我执行此代码时，收到此错误消息：
$(document).ready(function () {
window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
var Video = $('#CaptureImage');
var Canvas = $('#Canvas');
var Image = $('.Photo_BDD');
var Take = $('.Take');
var ImageContext = Canvas[0].getContext('2d');
var Width = Video.width() - 2;
var Height = Video.height() - 2;
Canvas.width = Width;
Canvas.height = Height;
var MediaSizeConstraints = {
mandatory: {
minWidth: Width,
minHeight: Height,
maxWidth: Width,
maxHeight: Height
}
};
var LocalStream = null;
var VideoConstraints = {
audio: false,
video: true,
video: MediaSizeConstraints
};
$('.Capture').click(function () {
Start();
Take.click(function () {
if (LocalStream) {
ImageContext.drawImage(Video, 0, 0, Canvas.width, Canvas.height);
Image.attr('src', Canvas.toDataURL('image/png'));
}
});
});
function Start() {
try {
navigator.getUserMedia(VideoConstraints, successCallback, errorCallback);
} catch (e) {
throw new Exception('Error:GetUserMedia not execute');
}
}
function Stop() {
Video.trigger("pause");
Video.attr('Src', '');
LocalStream.stop();
}
function successCallback(Stream) {
LocalStream = Stream;
if (window.URL) {
Video.attr('Src', URL.createObjectURL(Stream));
} else {
Video.attr('Src', Stream);
}
Video.attr('autoplay', true);
}
function errorCallback() {
console.error('An error occurred: [CODE ' + error.code + ']');
}
});
<projects>
<project pid="p123">
<leader>
<name>Amanda</name>
</leader>
<analyst>
<name>Bob</name>
</analyst>
</project>
<project pid="p456">
<leader>
<name>John</name>
</leader>
</project>
<project pid="p789">
<leader>
<name>David</name>
</leader>
<analyst>
<name>Amanda</name>
</analyst>
</project>
</projects>