用PHP在服务器上用ffmpeg进行视频转换，本地测试OK后，服务器出现错误

Warning: proc_open() [function.proc-open]: CreateProcess failed in E:\showq\includes\class.movie2flv.php on line 46
success!
Warning: proc_open() [function.proc-open]: CreateProcess failed in E:\showq\includes\class.movie2flv.php on line 46
success错误如上，估计是服务器配置问题相关代码如下require_once('class.movie2flv.php');$arg = array(
'ffmpeg' => 'D:\ffmpeg\Libs\ffmpeg.exe',
'moviesrc' => 'E:\showq\upload\video\172.avi',
'flv' => 'E:\showq\upload\video\172.flv',
'logfile' => 'E:\showq\log.log',
'pic' => 'E:\showq\upload\video\172.jpg',
'flvwidth'=>'500',
'flvheight'=>'400',
'picheight'=>'110',
'picwidth'=>'150'
);$m2f = new movie2flv($arg);$cmd = $m2f->getmoviecmd();
$m2f->run($cmd);if($m2f->code){
echo 'failed!';
}else{
echo 'success!';
}$piccmd = $m2f->getpiccmd();
$m2f->run($piccmd);
if($m2f->code){
echo 'failed';
}else{
echo 'success';
}