小贝子编程

从php脚本运行dir2ogg



我正在尝试编写一个php脚本，它将接受上传的mp3文件，并自动创建一个ogg格式的副本。我的想法是使用exec()或shell_exec()从php运行dir2ogg。这是我的代码：

$command = 'dir2ogg /var/www/bais-mordechai-laravel/public/uploads/"'.$filename.'"';
$output = shell_exec($command);

我从中得到的输出只是预期输出的第一行：

dir2ogg 0.11.8 (2009-08-04), converts audio files into ogg vorbis.

当我直接从命令行(作为root用户)运行它时，我得到以下内容：

dir2ogg 0.11.8 (2009-08-04), converts audio files into ogg vorbis.
INFO: Converting "/var/www/bais-mordechai-laravel/public/uploads/Track 02.mp3" (using mpg123 as decoder)...
[wav.c:371] warning: Cannot rewind WAV file. File-format isn't fully conform now.
Encoding standard input to 
"/var/www/bais-mordechai-laravel/public/uploads/Track 02.ogg" 
at quality 3.00
Encoding [ 0m15s so far] / [wav.c:371] warning: Cannot rewind WAV file. File-format     isn't fully conform now.

Done encoding file "/var/www/bais-mordechai-laravel/public/uploads/Track 02.ogg"
File length:  3m 50.0s
Elapsed time: 0m 15.7s
Rate:         14.6600
Average bitrate: 91.1 kb/s

因此，在命令执行完成之前，函数似乎正在返回。

我认为这个脚本可能是自己完成的，但没有按照我的意愿创建ogg文件。

所以我的问题是，我该如何让它发挥作用，或者我该如何调试它？

更新：根据Mehran的建议，以下是我的stderr输出：

Array
(
[stdout] => dir2ogg 0.11.8 (2009-08-04), converts audio files into ogg vorbis.

[stderr] => Traceback (most recent call last):
File "/usr/bin/dir2ogg", line 673, in <module>
main()
File "/usr/bin/dir2ogg", line 641, in main
conf = read_opts()
File "/usr/bin/dir2ogg", line 120, in read_opts
in_path = [prefix for prefix in os.environ['PATH'].split(os.pathsep) if os.path.exists(os.path.join(prefix, command))]
File "/usr/lib/python2.7/UserDict.py", line 23, in __getitem__
raise KeyError(key)
KeyError: 'PATH'
[return] => 1
)

问题背后的原因特定于您的系统，因为我可以轻松地运行您的代码并生成.ogg文件。以下是当我运行一个包含您的代码的php文件时得到的结果：

dir2ogg 0.11.8 (2009-08-04), converts audio files into ogg vorbis.
INFO: Converting "/home/mehran/001.mp3" (using mpg123 as decoder)...

正如我在成功创建001.ogg之前所说的。执行过程中发生的任何事情都是特定于您的配置的。调试方法是获取并打印进程的stderr。以下是获取它的方法(shell_exec和exec函数不提供此功能)：

<?php
function _pipeExec($cmd, $input = '')
{
$proc = proc_open($cmd, array(0 => array('pipe', 'r'), 1 => array('pipe', 'w'), 2 => array('pipe', 'w')), $pipes);
fwrite($pipes[0], $input);
fclose($pipes[0]);
$stdout = stream_get_contents($pipes[1]);
fclose($pipes[1]);
$stderr = stream_get_contents($pipes[2]);
fclose($pipes[2]);
$rtn = proc_close($proc);
$result = array(
'stdout' => $stdout
, 'stderr' => $stderr
, 'return' => $rtn
);
return $result;
}
$command = 'dir2ogg /home/mehran/"001.mp3"';
$output = _pipeExec($command);
print_r($output);

您可以在此处找到有关proc_open的更多信息。但简短的描述是，它做的正是你想要的，它为你提供了一个过程产生的所有输出。在我的计算机中，上述代码生成：

Array
(
[stdout] => dir2ogg 0.11.8 (2009-08-04), converts audio files into ogg vorbis.
INFO: Converting "/home/mehran/001.mp3" (using mpg123 as decoder)...
[stderr] => [wav.c:371] warning: Cannot rewind WAV file. File-format isn't fully conform now.
Encoding standard input to 
"/home/mehran/001.ogg" 
at quality 3.00
Encoding [ 0m00s so far] | 
Encoding [ 0m00s so far] / 
Encoding [ 0m00s so far] - 
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Encoding [ 0m05s so far] / [wav.c:371] warning: Cannot rewind WAV file. File-format isn't fully conform now.
Encoding [ 0m05s so far] - 
Done encoding file "/home/mehran/001.ogg"
File length:  3m 13.0s
Elapsed time: 0m 05.1s
Rate:         37.8620
Average bitrate: 110.9 kb/s

[return] => 0
)

您可以使用return值来检查流程是否成功，正如您所看到的，甚至还打印了进度指示器。尽管如此，您还是可以查看stderr并发现您的代码有什么问题。

[更新]

很遗憾，我无法复制您的错误。我只是试着做你想做的事，但我自己也遇到了一个问题，我认为这值得分享。以下是我上传和转换音频文件的完整工作代码：

<?php
function _pipeExec($cmd, $input = '')
{
$proc = proc_open($cmd, array(0 => array('pipe', 'r'), 1 => array('pipe', 'w'), 2 => array('pipe', 'w')), $pipes);
fwrite($pipes[0], $input);
fclose($pipes[0]);
$stdout = stream_get_contents($pipes[1]);
fclose($pipes[1]);
$stderr = stream_get_contents($pipes[2]);
fclose($pipes[2]);
$rtn = proc_close($proc);
$result = array(
'stdout' => $stdout
, 'stderr' => $stderr
, 'return' => $rtn
);
return $result;
}
?>
<html>
<body>
<form method="post" action="./ogg.php" enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="music" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
if (isset($_FILES['music'])) {
$des = $_FILES['music']['tmp_name'] .'.'. pathinfo($_FILES['music']['name'], PATHINFO_EXTENSION);
rename($_FILES['music']['tmp_name'], $des);
$command = 'dir2ogg "' . $des . '"';
$output = _pipeExec($command);
echo "<div style='height: 500px; overflow: auto;'><pre>";
print_r($output);
echo "</pre></div>";
}
?>
</body>
</html>

如果你省略会导致问题的部分是：

$des = $_FILES['music']['tmp_name'] .'.'. pathinfo($_FILES['music']['name'], PATHINFO_EXTENSION);
rename($_FILES['music']['tmp_name'], $des);

这将重命名临时上传的文件，使其具有与其原始文件名相同的扩展名，即将.mp3附加到上传的文件中。没有这个，我无法将文件转换为.ogg文件。

关于你的错误，还有一件事，请确保你上传的文件与dir2ogg兼容，因为我在这里和那里的一些帖子中读到，有些格式不兼容，因此dir2ogg会输出类似你的错误。

最后，请确保您的文件大小不超过您的上传大小和/或帖子大小限制。phpinfo()将提示您当前的upload_max_filesize和post_max_size。也许你的文件根本没有上传！您可以通过查看$_FILES['music']['error']来确保文件上传成功。

这就是我的全部！

您可以这样做；

$command = 'dir2ogg /var/www/bais-mordechai-laravel/public/uploads/"'.$filename.'"';
exec ("$command 2>&1", $convert_output, $return_val);
if(preg_match("/Done/i", $convert_output[10])) {
echo "Convert complete";
} else {
echo "Conversion error";
exit;
}

关键点在我的观点；

  1. 2>&1将命令输出重定向到控制台，因此将其分配给$convert_output逐行

  2. 我已经查看了您的输出，结果关键字存在于10行，">完成编码……"。因此，您可以使用关键字">Done进行regex查找。"在线10

  3. 最后，在转换完成之前，您不会得到输出

您还可以通过检查结果输出；

var_dump(array($convert_output, $return_val));

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