Javascript Clmtrackr无法处理响应性强的html5摄像头视频
我使用clmtrackr跟踪我的脸,但当我将视频标签的宽度设置为100%时,它无法跟踪脸。我尝试将canvas标签的宽度设置为与video标签的宽度相同,但仍然无法工作Javascript Clmtrackr无法处理响应性强的html5摄像头视频,javascript,html,mobile,Javascript,Html,Mobile,我使用clmtrackr跟踪我的脸,但当我将视频标签的宽度设置为100%时,它无法跟踪脸。我尝试将canvas标签的宽度设置为与video标签的宽度相同,但仍然无法工作 <div style="text-align:center;"> <div style="border: 1px solid #ccc; display:inline-block; position:relative;"> <video id="inputVideo" wid
<div style="text-align:center;">
<div style="border: 1px solid #ccc; display:inline-block; position:relative;">
<video id="inputVideo" width="100%" height="auto" autoplay></video>
<canvas id="canvas" width="100%" height="auto" style="position:absolute; top:0; left:0;"></canvas>
</div>
</div>
<script src="clmtrackr.min.js"></script>
<script type="text/javascript">
// Put event listeners into place
window.addEventListener("DOMContentLoaded", function() {
// Grab elements, create settings, etc.
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
video = document.getElementById("inputVideo"),
videoObj = { "video": true },
videoFace = document.getElementById("video-face"),
errBack = function(error) {
console.log("Video capture error: ", error.code);
};
if(navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
// Not adding `{ audio: true }` since we only want video now
navigator.mediaDevices.getUserMedia({ video: true }).then(function(stream) {
video.src = window.URL.createObjectURL(stream);
video.play();
});
} else if(navigator.getUserMedia) { // Standard
navigator.getUserMedia(videoObj, function(stream) {
video.src = stream;
video.play();
}, errBack);
} else if(navigator.webkitGetUserMedia) { // WebKit-prefixed
navigator.webkitGetUserMedia(videoObj, function(stream){
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
}
var ctracker = new clm.tracker();
ctracker.init();
ctracker.start(video);
function positionLoop() {
requestAnimationFrame(positionLoop);
var positions = ctracker.getCurrentPosition();
}
positionLoop();
function drawLoop() {
requestAnimationFrame(drawLoop);
context.clearRect(0, 0, canvas.width, canvas.height);
ctracker.draw(canvas);
}
drawLoop();
});
</script>
//将事件侦听器放置到位
addEventListener(“DOMContentLoaded”,function()){
//抓取元素、创建设置等。
var canvas=document.getElementById(“canvas”),
context=canvas.getContext(“2d”),
video=document.getElementById(“inputVideo”),
videoObj={“video”:true},
videoFace=document.getElementById(“视频面”),
errBack=函数(错误){
日志(“视频捕获错误:”,错误代码);
};
if(navigator.mediaDevices&&navigator.mediaDevices.getUserMedia){
//不添加“{audio:true}”,因为我们现在只需要视频
navigator.mediaDevices.getUserMedia({video:true})。然后(函数(流){
video.src=window.URL.createObjectURL(流);
video.play();
});
}else if(navigator.getUserMedia){//Standard
getUserMedia(videoObj,函数(流){
video.src=流;
video.play();
},errBack);
}else if(navigator.webkitGetUserMedia){//WebKit前缀
webkitGetUserMedia(videoObj,函数(流){
video.src=window.webkitURL.createObjectURL(流);
video.play();
},errBack);
}
var ctracker=new clm.tracker();
ctracker.init();
ctracker.start(视频);
函数positionLoop(){
requestAnimationFrame(positionLoop);
var positions=ctracker.getCurrentPosition();
}
positionLoop();
函数drawLoop(){
requestAnimationFrame(drawLoop);
clearRect(0,0,canvas.width,canvas.height);
ctracker.draw(画布);
}
drawLoop();
});
为什么除非将视频的宽度设置为640,视频的高度设置为480,否则无法跟踪人脸?
如何使用响应式width='100%'和height='auto'修复它?您的网络摄像头分辨率应为640x480,并且您正在尝试使用更高分辨率(width='100%')的帧。我也遇到了同样的问题,并通过减少视频元素的宽度-高度属性来修复它。您的网络摄像头分辨率应为640x480,并且您正在尝试拍摄分辨率更高的帧(宽度为100%)。我也有同样的问题,并通过减少视频元素的宽度-高度属性来修复它