This is the main index.php file where I run my code to generate a video thumbnail with ffmpeg but it has no lucks at all I have been searching online for a lot of solution but nothing comes out i will be very appreciate if you guys can help me out. The shell_exec() keep giving me error
<html>
<head>
</head>
<body>
<form action="index.php" method="POST" enctype="multipart/form-data">
<input type="file" name="file"><input type="submit" name="submit" value="upload">
</form>
<?php
if(isset($_POST['submit'])){
$ffmpeg = "/Users/mac/Documents/ffmpeg/3.1.4/bin/ffmpeg";
$videoFile = $_FILES["file"]["tmp_name"];
$imageFile = "1.jpg";
$size = "320x240";
$getFromSecond = 5;
$cmd = "$ffmpeg -i $videoFile -an -ss $getFromSecond -s $size $imageFile 2>&1";
echo shell_exec($cmd);
echo shell_exec('whoami');
if(!shell_exec($cmd)){
echo "thumbnail created";
}else{
echo "error creating thumbnail";
}
}
?>
</body>
</html>