上传从网络摄像头拍摄的照片 [英] Uploading a picture taken from a webcam

问题描述

如何上传我从网络摄像头拍摄的照片，我发现了一个代码，工作（仅限Chrome）

How do i upload a picture that i took from a webcam, i've found a code that worked (only on Chrome)

我已经使用了代码，当我拍照时，我得到了图片，但我没看到它来源？

i've used the code, and when clic on Take picture, i got the picture but i dont see it on the source?

<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

How do i add it to a form that have a picture element

<input name="avatar" class="avatar" type="file" required>

如您所见，该字段是必填字段，因此如果将字段添加到该字段，表单将看到它是非空的？

as you can see, the field is required, so if it is added to that field the form will see it as a non-empty?

为什么它不能用于Opera？我使用Opera 12.15

Why it dont work on Opera? i use Opera 12.15

更新：我找到了如何将画布转换为图片，但不知道如何在图片中填充它：

Update: i found how to convert to canvas to image, but dont know how to fill it in the image:

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。

if i use the javascript console, i get the source, but if i validate the form, the form thinks that the image is still missing and it is blank.

任何想法？

推荐答案

使用snapshot（）运行构建SetInterval 300毫秒。

Build the SetInterval with snapshot() runing in 300ms.

该按钮仅停止间隔，;）

The button only stop the interval, ;)

<button onclick="clearInterval(ivl)">Take Picture</button>

var ivl = setInterval(function(){  snapshot(); },300);

这篇关于上传从网络摄像头拍摄的照片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！