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我有一个写入用于在Ubuntu gstreamer的应用（管道）经由网络摄像头和帧捕获器捕捉到2个视频流，并把它们放进一个容器中的脚本：执行的Gstreamer管道脚本
gst-launch -e mpegtsmux name="muxer" ! filesink location=TestHDMainCamera.ts \
v4l2src device="/dev/video1" ! video/x-raw-yuv, width=1280 ,height=720, \
framerate=30/1 ! videorate ! ffmpegcolorspace ! x264enc ! muxer. \
v4l2src device="/dev/video0" ! video/x-raw-yuv, width=1024 ,height=768, \
framerate=30/1 ! x264enc ! muxer. pulsesrc \
device="alsa_input.usb-046d_Logitech_Webcam_C930e_AAF8A63E-02-C930e.analog-stereo" \
! audioconvert ! lamemp3enc target=1 cbr=true ! muxer.
我只需将其放入.sh文件并通过终端执行即可。使生活更轻松我写了一个简单的PHP代码来创建一个简单的（！）网站界面（在本地主机上运行）来控制捕获过程（开始：运行.sh文件并停止：Ctrl + c）
包括两个额外的按钮，只是测试的图像采集卡和单独的摄像头传来的数据流，看看它们连接与否：
摄像头的测试预览：
gst-launch v4l2src device=/dev/video1 ! ffmpegcolorspace ! xvimagesink
采集卡的测试预览：
gst-launch v4l2src device=/dev/video0 ! ffmpegcolorspace ! xvimagesink
这里是问题：
每次我加载页面，我按开始按钮似乎PHP执行.sh管道并立即终止（我得到这个消息在屏幕上：释放管道...... ）因此，即使我尝试使用测试按钮只是为了使实时流结果相同，我也没有捕获到流（！）...
请问您可以帮助我，告诉我如何运行管道gstreamer使用这个php代码捕获的代码？ （需要GStreamer的管道被终止只有当我按下“停止”按钮，应该执行按Ctrl + C函数）
更多信息：
下面是接口main.php代码（这是一个有点凌乱，关于对不起）：
<html>
<head>
<title>PHP Test</title>
</head>
<body>
<?php
echo '<p>Hello</p>';
print_r($_GET);
if (isset($_GET['action'])) {
switch ($_GET['action']) {
case 'Test Webcam':
testWebcam();
break;
case 'Test Framegrabber':
testFramegrabber();
break;
}
}
function testFramegrabber() {
echo "The Test Framegrabber function is called.";
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
}
function testWebcam() {
echo "The Test Webcam function is called.";
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
}
//$output = shell_exec('ls -lart');
//echo "<pre>$output</pre>";
?>
<form action="main.php">
<input type="submit" class="button" name="action" value="Test Webcam" />
<input type="submit" class="button" name="action" value="Test Framegrabber" />
</form>
</body>
</html>
，这里是为按钮和其他细节record.php：
<html>
<head>
<title>Recording page</title>
<link rel="stylesheet" type="text/css" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script type="text/javascript">
var w = null; // initialize variable
//function to start the timer
function startTimer()
{
// First check whether Web Workers are supported
if (typeof(Worker)!=="undefined"){
// Check whether Web Worker has been created. If not, create a new Web Worker based on the Javascript file simple-timer.js
if (w==null){
w = new Worker("simple-timer.js");
}
// Update timer div with output from Web Worker
w.onmessage = function (event) {
document.getElementById("timer").innerHTML = event.data;
};
} else {
// Web workers are not supported by your browser
document.getElementById("timer").innerHTML = "Sorry, your browser does not support Web Workers ...";
}
}
//function to stop the timer
function stopTimer()
{
w.terminate();
timerStart = true;
w = null;
}
function handleTimer() {
document.getElementById("timerp").innerHTML = "start timer";
}
</script>
</head>
<body>
<?php
echo '<p>Hello</p>';
print_r($_GET);
if (isset($_GET['action'])) {
switch ($_GET['action']) {
case 'Test Webcam':
testWebcam();
break;
case 'Test Framegrabber':
testFramegrabber();
break;
case 'Record':
record();
break;
}
}
function testFramegrabber() {
echo "The Test Framegrabber function is called.";
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
}
function testWebcam() {
echo "The Test Webcam function is called.";
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
}
function record(){
echo "The Record function is called.";
echo "<script> startTimer(); </script>";
}
function stop(){
echo "The Stop function is called.";
echo "<script> stopTimer(); </script>";
}
//$output = shell_exec('ls -lart');
//echo "<pre>$output</pre>";
?>
<div class="header">A simple timer:</div>
<div class="timer" id="timer">00:00</div>
<div class="buttons">
<button onclick="startTimer()" id="button1">Start</button>
<button onclick="stopTimer()" id = "button2">Stop</button>
</div>
<form class="form-horizontal" action="record.php">
<fieldset>
<!-- Form Name -->
<legend>Sreen recorder</legend>
<table class="tg" width="100%">
<tr>
<th class="tg-031e"></th>
<th class="tg-031e">fdsfs</th>
</tr>
<tr>
<td class="tg-031e"></td>
<td class="tg-031e"></td>
<td class="tg-031e"></td>
</tr>
<tr>
<td class="tg-031e"></td>
<td class="tg-031e"></td>
<td class="tg-031e"></td>
</tr>
<tr>
<td class="tg-031e">
<!-- Button -->
<div class="control-group">
<label class="control-label" for="recordbtn"></label>
<div class="controls">
<button id="recordbtn" name="action" class="btn btn-danger" value="Record" onclick="startTimer()">Record</button>
</div>
</div>
</td>
<td class="tg-031e">
<!-- Button -->
<div class="control-group">
<label class="control-label" for="stopbtn"></label>
<div class="controls">
<button id="stopbtn" name="action" class="btn btn-inverse" value="Stop" onclick="stopTimer()">Stop</button>
</div>
</div>
</td>
<td class="tg-031e">
<!-- Button -->
<div class="control-group">
<label class="control-label" for="nextbtn"></label>
<div class="controls">
<button id="nextbtn" name="action" class="btn btn-inverse">Next recording</button>
</div>
</div>
</td>
</tr>
</table>
<!-- Button -->
<div class="control-group">
<label class="control-label" for="webcamTest"></label>
<div class="controls">
<button id="webcamTest" name="action" value="Test Webcam" class="btn btn-info">Test Webcam</button>
</div>
</div>
<!-- Button -->
<div class="control-group">
<label class="control-label" for="testFramegrabber"></label>
<div class="controls">
<button id="testFramegrabber" name="action" value="Test Framegrabber" class="btn btn-info">Test Framegrabber</button>
</div>
</div>
<!-- Select Basic -->
<div class="control-group">
<label class="control-label" for="recordPath">Path to record</label>
<div class="controls">
<select id="recordPath" name="recordPath" class="input-xlarge">
<option>/desktop</option>
<option>/home/var</option>
</select>
</div>
</div>
</fieldset>
</form>
</body>
</html>
，只是一个简单的定时器而C被示出为在页面上适合：
var timerStart = true;
function myTimer(d0)
{
// get current time
var d=(new Date()).valueOf();
// calculate time difference between now and initial time
var diff = d-d0;
// calculate number of minutes
var minutes = Math.floor(diff/1000/60);
// calculate number of seconds
var seconds = Math.floor(diff/1000)-minutes*60;
var myVar = null;
// if number of minutes less than 10, add a leading "0"
minutes = minutes.toString();
if (minutes.length == 1){
minutes = "0"+minutes;
}
// if number of seconds less than 10, add a leading "0"
seconds = seconds.toString();
if (seconds.length == 1){
seconds = "0"+seconds;
}
// return output to Web Worker
postMessage(minutes+":"+seconds);
}
if (timerStart){
// get current time
var d0=(new Date()).valueOf();
// repeat myTimer(d0) every 100 ms
myVar=setInterval(function(){myTimer(d0)},100);
// timer should not start anymore since it has been started
timerStart = false;
}