使用闪光灯捕捉摄像头图像？

问题描述

是否有任何开源的Flash工具，我可以嵌入在网页上，并用它来捕捉用户的摄像头图像或短期的剪辑，并做POST到我的服务器servlet？我不寻找流媒体视频，所以我不需要red5或闪存服务器。你可以详细说一下...？

解决方案

这听起来像是一个很好的候选人。
大约两年前我在大学使用了一个项目。你可以查看。
在我看来，你会有3个步骤：

$ $ $ $ code $ //创建一个Camera对象

//这段代码来自LiveDocs
var camera：Camera = Camera.getCamera（）;
var video：Video;
if（camera！= null）{
video = new Video（camera.width * 2，camera.height * 2）;
video.attachCamera（camera）;
addChild（video）;
} else {
trace（你需要一个摄像头）;
}

// 2。采取一个或多个截图使用BitmapData

var截图：BitmapData =新的BitmapData（video.width，video.height，false，0x009900）;
screenshot.draw（video）;
//你可能会把更多的这些保存在一个名为screenshots的数组中，比如

// 3。创建一个GIFEncoder并将其发送到服务器：



//假设屏幕截图是以前保存的BitmapData对象的数组$ b $ var动画编码器：GIF编码器=新GIF编码器）;
animationEncoder.setRepeat（0）;
animationEncoder.setDelay（150）;
animationEncoder.start（）;
for（var i：int = 1; i< screenshots.length; i ++）{
animationEncoder.addFrame（screenshots [i]）;
}
animationEncoder.finish（）;
//将其保存在服务器上
var header：URLRequestHeader = new URLRequestHeader（Content-type，application / octet-stream）; //二进制头文件
var gifRequest：URLRequest = new URLRequest（'http：//yourServer/writeGIF.php？name = myFile.gif& method = download'）;
gifRequest.requestHeaders.push（header）;
gifRequest.method = URLRequestMethod.POST;
gifRequest.data = animationEncoder.stream;
sendToURL（gifRequest）;



//很显然你会让侦听器检查一切是否正常，以及何时该操作完成。

// PHP代码将会是这样简单的



$ method = $ _GET ['method'];
$ name = $ _GET ['name'];

if（isset（$ GLOBALS [HTTP_RAW_POST_DATA]））{

// get bytearray
$ gif = $ GLOBALS [HTTP_RAW_POST_DATA];

//添加下载对话框标题
header（'Content-Type：image / gif'）;
header（'Content-Length：'.strlen（$ gif））;
header（'Content-disposition：'。$ method。'; filename =''。$ name。'。gif'）;

echo $ gif;

} else echo'发生错误。

？>

应该是这样。

制作请确保您查看和好玩的应用:)
也值得一看。

b $ b

Is there any open source flash utility that i can embed on a webpage and use it to capture user webcam image or short duration clips and do "POST" to my server servlet ? i do not looking for streaming video and so i do not need red5 or flash server. can you folks elaborate ...?

解决方案

This sounds like a good candidate for Thibault Imbert's AS3 GIF Animation Encoding Class.I've used it about 2 years ago for a project at University. You can check it out here.In my opinion you would have 3 steps:

//1.Create a Camera object

//this code comes from the LiveDocs
var camera:Camera = Camera.getCamera();
var video:Video;
if (camera != null) {
    video = new Video(camera.width * 2, camera.height * 2);
    video.attachCamera(camera);
    addChild(video);
} else {
    trace("You need a camera.");
}

//2. Take one or more 'screenshots' using BitmapData

    var screenshot:BitmapData = new BitmapData(video.width,video.height,false,0x009900);
    screenshot.draw(video);
    //you would probably save more of these in an array called screenshots maybe

//3. Create a GIFEncoder and send it to the server:



//assuming screenshots is an array of BitmapData objects previously saved
var animationEncoder:GIFEncoder = new GIFEncoder();
animationEncoder.setRepeat(0);
animationEncoder.setDelay (150);
animationEncoder.start();
for(var i:int = 1 ; i < screenshots.length ; i++){
    animationEncoder.addFrame(screenshots[i]);
}
animationEncoder.finish();
//save it on the server
var header:URLRequestHeader = new URLRequestHeader ("Content-type", "application/octet-stream");//binary header
var gifRequest:URLRequest = new URLRequest ('http://yourServer/writeGIF.php?name=myFile.gif&method=download');
gifRequest.requestHeaders.push (header);
gifRequest.method = URLRequestMethod.POST;
gifRequest.data = animationEncoder.stream;
sendToURL(gifRequest);



//Obviously you would have listeners to check if everything was ok, and when the operation //is complete.

//The PHP code would be something simple as this

    <?php

    $method = $_GET['method'];
    $name = $_GET['name'];

    if ( isset ( $GLOBALS["HTTP_RAW_POST_DATA"] )) {

        // get bytearray
        $gif = $GLOBALS["HTTP_RAW_POST_DATA"];

        // add headers for download dialog-box
        header('Content-Type: image/gif');
        header('Content-Length: '.strlen($gif ));
        header('Content-disposition:'.$method.'; filename="'.$name.'".gif');

        echo $gif ;

    }  else echo 'An error occured.';

    ?>

That should be it.

Make sure you check out Thibault Imbert's AS3 GIF Animation Encoding Class and this Web-Cam-Stop-Motion fun app :)Lee Felarca's SimpleFlvWriter is worth looking at as well, depending on your needs.

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