处理ffmpeg和进度条的好函数php是什么[重复]答案

【问题标题】：what is the good function php to deal with ffmpeg and progress bar [duplicate]处理ffmpeg和进度条的好函数php是什么[重复]
【发布时间】：2013-10-10 06:39:25
【问题描述】：

我问一下ffmpeg和进度条

我在ffmpeg中使用了exec函数并将结果输出到txt文件

并使用我在这里找到的一些代码

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="es">
<title>AudioXtractor</title>
<body>
<center>



    <?php 

    define('RAPIDLEECH', 'yes');
    define('CONFIG_DIR', 'configs/');
    require_once('configs/config.php');
    define ( 'TEMPLATE_DIR', 'templates/'.$options['template_used'].'/' );
    // Include other useful functions
    require_once('classes/other.php');
    error_reporting(0);

    login_check();

    include(TEMPLATE_DIR.'header.php');

    echo ('<br><br><br><b>AudioXtractor</b>, un complemento <br> que te permite extraer el audio de tus videos.<br><br><br>');

    putenv('GDFONTPATH=' . realpath('.')); ?>

    <br />

    <FORM method="post"><center>
    <TABLE>
      <td>Movie:
    <select name="video">

    <?php
    $exts=array(".ac3", ".avi", ".f4v", ".flv", ".mkv", ".mov", ".mp4", ".mpg", ".mpeg", ".rmvb", ".srt", ".swf", ".wav", ".wmv");
    $ext="";
    function vidlist($dir) 
    {
    $results = array();
    $handler = opendir($dir);
    while ($file = readdir($handler)) 
    {
    if (strrchr($file,'.')!="")
    {
    $ext=strtolower(strrchr($file,'.'));
    }
    if ($file != '.' && $file != '..' && in_array($ext,$GLOBALS["exts"]))
    {
    $results[] = $file;
    }
    }
    closedir($handler);
    sort($results);
    return $results;
    }
    function Output($command) {
    $output = array($command);
    exec($command.' 2>&1', $output);
    return ($output);
    }
    $files = vidlist("./files/");
    foreach($files as $file)
    {
        echo '<option value="'.$file.'">'.$file.'</option>';
    }

    ?>


    </TABLE>

    <br/ >
    New MP3's name: 
    <input type="text" name="nvdo" value="nuevoaudio"> 
    <br/ >
    <br />
    <br />

    <td colspan=2><center><input type=submit style="font-size:16px; font-weight:bold; cursor:pointer;" name="analize" value=Extract /></td>
    <tr>

    </FORM>


    <?php
    if ($_POST['video']!="")

        $video = 'files/';
        $video=array();     
        $video[0] = $_POST['video'];

    if ($_POST['nvdo']!="")

        $nvdo = 'files/';
        $nvdo=array();      
        $nvdo[0] = $_POST['nvdo'];



    foreach ($video as $vdo)
    foreach ($nvdo as $nvd)

    if (isset($_POST["analize"])) {

        exec("ffmpeg -i files/$vdo -ab 192k files/$nvd.mp3 -y 2> files/$nvd.txt");

        $ext=strtolower(strrchr($vdo,'.'));

    /////////////////////////////////////////////////////my code //////////////////////////////////////////

    $content = @file_get_contents("files/$nvd.txt");


        //get duration of source
        preg_match("/Duration: (.*?), start:/", $content, $matches);

        $rawDuration = $matches[1];

        //rawDuration is in 00:00:00.00 format. This converts it to seconds.
        $ar = array_reverse(explode(":", $rawDuration));
        $duration = floatval($ar[0]);
        if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
        if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;

        //get the time in the file that is already encoded
        preg_match_all("/time=(.*?) bitrate/", $content, $matches);

        $rawTime = array_pop($matches);

        //this is needed if there is more than one match
        if (is_array($rawTime)){$rawTime = array_pop($rawTime);}

        //rawTime is in 00:00:00.00 format. This converts it to seconds.
        $ar = array_reverse(explode(":", $rawTime));
        $time = floatval($ar[0]);
        if (!empty($ar[1])) $time += intval($ar[1]) * 60;
        if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;

        //calculate the progress
        $progress = round(($time/$duration) * 100);




        echo '<BR><BR>¡Su video fue convertido correctamente! <BR><BR>Link al archivo:';

        echo ' <a href="files/'.$nvd.'.mp3">'.$nvd.'.mp3</a><BR />' . "<br>";
        echo "Duration: " . $duration . "<br>";
        echo "Current Time: " . $time . "<br>";
        echo "Progress: " . $progress . "%" . "<br>";

    //////////////////////////////////////my coed //////////////////////////////////////////////
    }

    ?>
    <br><br><a href="index.php">Volver al RapidLeech</a>

    <br><br><br>Formatos Aceptados: <br><b>.ac3, .avi, .f4v, .flv, .mkv, .mov, .mp3,<br> .mp4, .mpg, .mpeg, .rmvb, .srt, .swf, .wav, .wmv</b>
    <br><br>
    </center></body></html>

    <?php



    ?>

所以我问了一些人，他告诉我 exec stop php 脚本，从不给我

You can't get the progress directly if you are using exec, because the php script is stopped until ffmpeg closes. (Because exec returns the whole execution output)

You should use popen, for being able to get the output from the process in real time (without reading any file) for parse and show the progressbar

Here is a example for get the output: 

When you get the progress info from ffmpeg, you can use your code for parse it and show your progressbar

这是我打开的脚本

<?php 

$handle = popen ("ffmpeg.exe -i files/fz.mp4 -ab 192k files/vdf.mp3 2>&1 ", 'r');
$handles = (string)$handle;
$line = "";

while (false !== ($char = fgetc($handle)))
{
  if ($char == "\r")
  {
    // You could now parse the $line for status information.
    echo "$line\n";
    $line = "";
  } else {
    $line .= $char;
  }
  ob_flush();
  flush();
}
pclose ($handle);


    //get duration of source
    preg_match("/Duration: (.*?), start:/", $handles, $matches);

    $rawDuration = $matches[1];

    //rawDuration is in 00:00:00.00 format. This converts it to seconds.
    $ar = array_reverse(explode(":", $rawDuration));
    $duration = floatval($ar[0]);
    if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
    if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;

    //get the time in the file that is already encoded
    preg_match_all("/time=(.*?) bitrate/", $handles, $matches);

    $rawTime = array_pop($matches);

    //this is needed if there is more than one match
    if (is_array($rawTime)){$rawTime = array_pop($rawTime);}

    //rawTime is in 00:00:00.00 format. This converts it to seconds.
    $ar = array_reverse(explode(":", $rawTime));
    $time = floatval($ar[0]);
    if (!empty($ar[1])) $time += intval($ar[1]) * 60;
    if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;

    //calculate the progress
    $progress = round(($time/$duration) * 100);




    echo '<BR><BR>¡Su video fue convertido correctamente! <BR><BR>Link al archivo:';


    echo "Duration: " . $duration . "<br>";
    echo "Current Time: " . $time . "<br>";
    echo "Progress: " . $progress . "%" . "<br>";

//////////////////////////////////////my coed //////////////////////////////////////////////

?>

所以我不明白什么对 ffmpeg progressbAR 有好处

是执行还是弹出

所以请给我关于 ffmpeg 实时进度条的提示

进度条有什么好处

是html5进度条

或javascript进度条

【问题讨论】：

查看我的一个项目（php 中的 ffmpeg 转换器）：github.com/jmalinens/wap4 我会尽量记住并找到相关部分

标签： php ffmpeg progress-bar exec popen

【解决方案1】：

我的方法是这样的

$sCmd = "ffmpeg -i infile.mp4 ... -report outfile.mp4 > /var/log/ffmpeg.log";
$proc = popen($sCmd." 2>&1", "r");
$read = fread($proc, 2096);
pclose($proc);

这是我的一个旧项目中的一些修改代码。希望能给你一些启发：

<?php
//get so far encoded time
public function getEncodedTime(){

    $FFMPEGLog = file_get_contents('ffmpeg.log');
    $times     = explode('time=', $FFMPEGLog);
    $ctime     = count($times)-1;
    $timed     = explode(' bitrate=', $times[$ctime]);
    //print_r($timed);
    $nEncTime  = $timed[0];
    list($h, $m, $s) = explode(":", $nEncTime);
    $s = ceil($s); // 21.40 seconds => 22 seconds
    $nEncTime = hms2sec($h, $m, $s);

    return $nEncTime;

}

//covert H:i:s time to seconds
public function hms2sec ($h, $m, $s) {

    //list($h, $m, $s) = explode (":", $hms);
    $seconds = 0;
    $seconds += (intval((string)$h) * 3600);
    $seconds += (intval((string)$m) * 60);
    $seconds += (intval((string)$s));
    return $seconds;

}


//get total length of file
public function getTotalTime()
{
    $play_time_sec = 0;

    $lines = file('ffmpeg.log');
    foreach ($lines as $line_num => $line) {
        if(strpos($line, 'Duration') !== false) {
            $line = explode("Duration: ", $line);
            $line = explode(",", $line[1]);
            $line = explode(":", $line[0]);

            $play_time_sec = 0;
            $play_time_sec += intval((string)$line[0]) * 60 * 60; // hour
            $play_time_sec += intval((string)$line[1]) * 60; // minute
            $play_time_sec += intval((string)round($line[2])); // second
            break;
        }
    }

    return $play_time_sec;
}


//get percents completed:
public function getPercentsComplete()
{

    $sFileContents = file_get_contents('ffmpeg.log');
    if(stripos($sFileContents, 'No more inputs to read from, finishing') !== false) {
        return 100;
    }

    $nTotalTime = getTotalTime();
    $nEncodedTime = getEncodedTime();

    if($nEncodedTime <= 0)
        return 0;

    if($nEncodedTime >= $nTotalTime)
        return 100;

    $nPercentsComplete = round(($nEncodedTime/$nTotalTime)*100);

    return $nPercentsComplete;
}

【讨论】：