我正在使用webcam.js,但在移动设备上,默认情况下是打开前置摄像头。我想将默认设置更改为后置摄像头。是否有方法可以更改摄像头设备?
我正在使用webcam.js,但在移动设备上,默认情况下是打开前置摄像头。我想将默认设置更改为后置摄像头。是否有方法可以更改摄像头设备?
<script src="/js/webcamjs/webcam.js"></script>
<div id="my_camera" style="width:320px; height:240px;"></div>
<div id="my_result"></div>
<script language="JavaScript">
Webcam.set('constraints',{
facingMode: "environment"
});
Webcam.attach( '#my_camera' );
function take_snapshot() {
Webcam.snap( function(data_uri) {
document.getElementById('my_result').innerHTML = '<img src="'+data_uri+'"/>';
} );
}
</script>
<a href="javascript:void(take_snapshot())">Take Snapshot</a>
var constraints = {
video: true,
facingMode: "environment"
};
Webcam.set({
width: 250,
height: 200,
image_format: 'jpeg',
jpeg_quality: 90,
// I add this object constraints
constraints: {
facingMode: 'environment'
}
});