Make a thumbnail screenshot of the video

Make a thumbnail screenshot of the video

$source_path = $_SERVER['DOCUMENT_ROOT'] . 'content/videos/my_video.mp4';
$dest_path = $_SERVER['DOCUMENT_ROOT'] . 'content/videos/my_video.jpg';

//"-10" means offset of 10 seconds from start
exec("ffmpeg  -itsoffset -10  -i $source_path -s 320x240 $dest_path");