Generating random thumbnails with PHP+FFMPEG
- by MrGhost
I am trying to generate thumbnails from movies using FFMPEG and the FFMPEG-PHP extension.
My script works OK however takes 20 minutes just to generate 5-10 thumbnails!
The script works by generating random numbers which are used as frame numbers later. All numbers generated are within the movies frame count.
Can you work out why this script is taking 20 mins to finish?
<?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 = $mov->getFrameCount();
//Loop 5 times to generate random frame times
for ($i = 1; $i <= 5; ) {
// Generate a number within 200 and the total number of frames.
$frame = mt_rand(200,$total_frames);
$getframe = $mov->getFrame($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 => $getframe) {
$gd_image = $getframe->toGDImage();
imagejpeg($gd_image, "images/shot_".$key.'.jpeg');
imagedestroy($gd_image);
echo $key.'<br/>';
}
?>
The script SHOULD be generating frame numbers which are valid? Anything within START - END should be valid frame numbers? Yet the loop takes ages!
