如何上传我从网络摄像头拍摄的照片i've found a code that worked (only on Chrome)
我已经使用过这段代码,当我拍摄照片时,我得到了照片,但我没有在源头上看到它?
<video autoplay id="vid" style="display:none;"></video>
<canvas id="canvas" width="640" height="480" style="border:1px solid #d3d3d3;"></canvas><br>
<button onclick="snapshot()">Take Picture</button>
<script type="text/javascript">
var video = document.querySelector("#vid");
var canvas = document.querySelector('#canvas');
var ctx = canvas.getContext('2d');
var localMediaStream = null;
var onCameraFail = function (e) {
console.log('Camera did not work.', e);
};
function snapshot() {
if (localMediaStream) {
ctx.drawImage(video, 0, 0);
}
}
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
window.URL = window.URL || window.webkitURL;
navigator.getUserMedia({video:true}, function (stream) {
video.src = window.URL.createObjectURL(stream);
localMediaStream = stream;
}, onCameraFail);
</script>
如何将其添加到具有图片元素的表单
<input name="avatar" class="avatar" type="file" required>
如您所见,该字段是必填字段,因此如果将其添加到该字段,表单会将其视为非空字段?
为什么它不能用于Opera?我使用Opera 12.15
更新:i found how to convert to canvas to image,但不知道如何填写图片:
a = canvas.toDataURL("image/jpeg")
document.getElementById("avatar").src = a
如果我使用javascript控制台,我会获得源代码,但如果我验证表单,则表单认为图像仍然缺失且为空白。
任何想法?
答案 0 :(得分:0)
使用在300毫秒内运行的snapshot()构建SetInterval。
该按钮仅停止间隔,;)
<button onclick="clearInterval(ivl)">Take Picture</button>
var ivl = setInterval(function(){ snapshot(); },300);