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Autres articles (71)

  • MediaSPIP Core : La Configuration

    9 novembre 2010, par

    MediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
    Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...)

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

Sur d’autres sites (11356)

  • Seam carving

    13 février 2008, par Mikko Koppanen — Imagick, PHP stuff

    Today I was reading trough the ImageMagick ChangeLog and noticed an interesting entry. “Add support for liquid rescaling”. I rushed to check the MagickWand API docs and there it was : MagickLiquidRescaleImage ! After about ten minutes of hacking the Imagick support was done. Needless to say ; I was excited :)

    For those who don’t know what seam carving is check the demo here. More detailed information about the algorithm can be found here : “Seam Carving for Content-Aware Image Resizing” by Shai Avidan and Ariel Shamir

    To use this functionality you need to install at least ImageMagick 6.3.8-2 and liblqr. Remember to pass –with-lqr to ImageMagick configuration line. You can get liblqr here : http://liblqr.wikidot.com/. The Imagick side of the functionality should appear in the CVS today if everything goes as planned.

    Here is a really simple example just to illustrate the results of the operation. The parameters might be far from optimal (didn’t do much testing yet). The original dimensions of image are 500×375 and the resulting size is 500×200.

    Update : the functionality is pending until license issues are solved.

    php

    < view plain text >

    1. < ?php
    2.  
    3. /* Create new object */
    4. $im = new Imagick( ’test.jpg’ ) ;
    5.  
    6. /* Scale down */
    7. $im->liquidRescaleImage( 500, 200, 3, 25 ) ;
    8.  
    9. /* Display */
    10. header( ’Content-Type : image/jpg’ ) ;
    11. echo $im ;
    12.  
    13.  ?>

    The original image by flickr/jennconspiracy

    result

    And the result :

    result

    Update. On kenrick’s request here is an image which is scaled down to 300×300

    result2

  • what is the good function php to deal with ffmpeg and progress bar [duplicate]

    17 mai 2014, par Abed Soliman

    This question already has an answer here :

    I ask about ffmpeg and progressbar

    I used exec function with ffmpeg and output the result to txt file

    and using some of code I found here to

    <center>
    

    

    

    
    &lt;?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>
    

    
    &lt;?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 != '.' &amp;&amp; $file != '..' &amp;&amp; in_array($ext,$GLOBALS["exts"]))
    
    {
    
    $results[] = $file;
    
    }
    
    }
    
    closedir($handler);
    
    sort($results);
    
    return $results;
    
    }
    
    function Output($command) {
    
    $output = array($command);
    
    exec($command.' 2>&amp;1', $output);
    
    return ($output);
    
    }
    
    $files = vidlist("./files/");
    
    foreach($files as $file)
    
    {
    
        echo '<option value="'.$file.'">'.$file.'</option>';
    
    }
    

    
    ?>
    

    

    
    </select></td></table>
    

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

    
    <center><input type="submit" style="font-size:16px; font-weight:bold; cursor:pointer;" value="Extract" />
    
    
    

    
    </center></center></form>
    

    

    
    &lt;?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="http://stackoverflow.com/feeds/tag/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="http://stackoverflow.com/feeds/tag/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>
    

    
    &lt;?php
    

    

    

    
    ?>

    so i ask some one he told me the exec stop php script and never give me

    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

    this is my popen script

    &lt;?php 
    

    
$handle = popen ("ffmpeg.exe -i files/fz.mp4 -ab 192k files/vdf.mp3 2>&amp;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 //////////////////////////////////////////////
    

    
?>

    so i dont under stand what is good for ffmpeg progressbAR

    is exec or popen

    so please give me hints for ffmpeg real time progressbar

    what is good for progressbar

    is html5 progress bar

    or javascript progress bar

  • Encoding error with Sidekiq

    14 mars 2017, par DavidK

    Im following this tutorial https://www.pubnub.com/blog/2015-12-08-building-video-sharing-app-server-messaging-ruby/ on Building a Video Sharing App. Its a bit outdated and Ive already had to fix a view issues to get this far but Im pretty lost now with this latest issue. I believe its something to do with sidekiq. When I try uploading a video it seems to work and shows up on the database, but I get a "Video is still being encoded." message.

    This is the log :

    2017-03-13T22:00:14.729Z 11109 TID-ova30dq94 WebmVideoEncoder JID-540aa74110e63e334a712719 INFO: fail: 0.122 sec
    
2017-03-13T22:00:14.730Z 11109 TID-ova30dq94 WARN: {"context":"Job raised exception","job":{"class":"WebmVideoEncoder","args":[3],"retry":true,"queue":"default","jid":"540aa74110e63e334a712719","created_at":1489441065.533313,"enqueued_at":1489442414.60714,"error_message":"exception class/object expected","error_class":"TypeError","failed_at":1489441065.541595,"retry_count":6,"retried_at":1489442414.7293491},"jobstr":"{\"class\":\"WebmVideoEncoder\",\"args\":[3],\"retry\":true,\"queue\":\"default\",\"jid\":\"540aa74110e63e334a712719\",\"created_at\":1489441065.533313,\"enqueued_at\":1489442414.60714,\"error_message\":\"exception class/object expected\",\"error_class\":\"TypeError\",\"failed_at\":1489441065.541595,\"retry_count\":5,\"retried_at\":1489441667.7081149}"}
    
2017-03-13T22:00:14.730Z 11109 TID-ova30dq94 WARN: TypeError: exception class/object expected
    
2017-03-13T22:00:14.730Z 11109 TID-ova30dq94 WARN: /Users/David/rubyProjects/videouploader/videouploader/app/workers/webm_video_encoder.rb:14:in `raise'
    
/Users/David/rubyProjects/videouploader/videouploader/app/workers/webm_video_encoder.rb:14:in `perform'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:158:in `execute_job'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:138:in `block (4 levels) in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq.rb:36:in `block in '
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:133:in `block (3 levels) in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:128:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/bundler/gems/sidetiq-7bec4084165f/lib/sidetiq/middleware/history.rb:8:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/logging.rb:32:in `with_context'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:7:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:133:in `invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:132:in `block (2 levels) in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:174:in `stats'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:131:in `block in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:106:in `block in call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:68:in `block in wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:67:in `wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:105:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:126:in `process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:82:in `process_one'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:70:in `run'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:17:in `watchdog'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:26:in `block in safe_thread'
    
2017-03-13T22:00:50.877Z 11109 TID-ova3gyd4k ThumbnailCutter JID-d0c693e39e06c2cccdec7d33 INFO: start
    
sh: -c: line 0: syntax error near unexpected token `('
    
sh: -c: line 0: `ffmpeg -i /Users/David/rubyProjects/videouploader/videouploader/public/system/videos/video_files/000/000/002/original/Heart_of_Gold_-_Neil_Young_cover_with_harmonica.1_(1).mp4 -ss 00:00:01.000 -vframes 1 /tmp/1489442450881632.png'
    
2017-03-13T22:00:50.902Z 11109 TID-ova3gyd4k ThumbnailCutter JID-d0c693e39e06c2cccdec7d33 INFO: fail: 0.025 sec
    
2017-03-13T22:00:50.903Z 11109 TID-ova3gyd4k WARN: {"context":"Job raised exception","job":{"class":"ThumbnailCutter","args":[2],"retry":true,"queue":"default","jid":"d0c693e39e06c2cccdec7d33","created_at":1489437193.246615,"enqueued_at":1489442450.8759801,"error_message":"exception class/object expected","error_class":"TypeError","failed_at":1489437193.254677,"retry_count":7,"retried_at":1489442450.901133},"jobstr":"{\"class\":\"ThumbnailCutter\",\"args\":[2],\"retry\":true,\"queue\":\"default\",\"jid\":\"d0c693e39e06c2cccdec7d33\",\"created_at\":1489437193.246615,\"enqueued_at\":1489442450.8759801,\"error_message\":\"exception class/object expected\",\"error_class\":\"TypeError\",\"failed_at\":1489437193.254677,\"retry_count\":6,\"retried_at\":1489441044.6660218}"}
    
2017-03-13T22:00:50.903Z 11109 TID-ova3gyd4k WARN: TypeError: exception class/object expected
    
2017-03-13T22:00:50.903Z 11109 TID-ova3gyd4k WARN: /Users/David/rubyProjects/videouploader/videouploader/app/workers/thumbnail_cutter.rb:13:in `raise'
    
/Users/David/rubyProjects/videouploader/videouploader/app/workers/thumbnail_cutter.rb:13:in `perform'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:158:in `execute_job'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:138:in `block (4 levels) in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq.rb:36:in `block in '
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:133:in `block (3 levels) in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:128:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/bundler/gems/sidetiq-7bec4084165f/lib/sidetiq/middleware/history.rb:8:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/logging.rb:32:in `with_context'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/server/logging.rb:7:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/middleware/chain.rb:133:in `invoke'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:132:in `block (2 levels) in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:174:in `stats'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:131:in `block in process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:106:in `block in call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:68:in `block in wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/execution_wrapper.rb:85:in `wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/activesupport-5.0.2/lib/active_support/reloader.rb:67:in `wrap'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/rails.rb:105:in `call'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:126:in `process'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:82:in `process_one'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/processor.rb:70:in `run'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:17:in `watchdog'
    
/Users/David/.rvm/gems/ruby-2.3.0/gems/sidekiq-4.2.9/lib/sidekiq/util.rb:26:in `block in safe_thread'

    thumbnail_cutter.rb

    class ThumbnailCutter
    
  include Sidekiq::Worker
    

    
  def perform(video_id)
    
    video = Video.find(video_id)
    
    output = "/tmp/#{Time.now.getutc.to_f.to_s.delete('.')}.png"
    
    _command = `ffmpeg -i #{video.video_file.path} -ss 00:00:01.000 -vframes 1 #{output}`
    
    if $?.to_i == 0
    
      video.thumbnail = File.open(output, 'r')
    
      video.save
    
      FileUtils.rm(output)
    
    else
    
      raise $?
    
    end
    
  end
    
end

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