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POGenerating random thumbnails with PHP+FFMPEG
 

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  1. POGenerating random thumbnails with PHP+FFMPEG
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    <p>I'm trying to generate thumbnails from random points in a movie using FFMPEG and FFMPEG-PHP extension.</p> <p><strong>My script works OK.. however takes 20 minutes just to generate 5-10 thumbnails!!</strong></p> <p>The script works by generating random numbers which are used as frame numbers later. All numbers generated are within the movies frame count. </p> <p>Can you work out why this script is taking 20 mins to finish? If not, a better solution?</p> <pre><code>&lt;?php //Dont' timeout set_time_limit(0); //Load the file (This can be any file - still takes ages) $mov = new ffmpeg_movie('1486460.mp4'); //Get the total frames within the movie $total_frames = $mov-&gt;getFrameCount(); //Loop 5-10 times to generate random frames 5-10 times for ($i = 1; $i &lt;= 5; ) { // Generate a number within 200 and the total number of frames. $frame = mt_rand(200,$total_frames); $getframe = $mov-&gt;getFrame($frame); // Check if the frame exists within the movie // If it does, place the frame number inside an array and break the current loop if($getframe){ $frames[$frame] = $getframe ; $i++; } } //For each frame found generate a thumbnail foreach ($frames as $key =&gt; $getframe) { $gd_image = $getframe-&gt;toGDImage(); imagejpeg($gd_image, "images/shot_".$key.'.jpeg'); imagedestroy($gd_image); echo $key.'&lt;br/&gt;'; } ?&gt; </code></pre> <p>The script SHOULD be generating frame numbers which are valid? Anything within START - END should be valid frame numbers? Yet the loop takes ages!</p>
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