probe redimencionandola, pero no me funciona :(
Código PHP:
$filename = $url;
header("Content-type: image/jpeg");
list($width, $height) = getimagesize($filename);
$width2 = 120;
$height2 = 120;
$thumb = imagecreate($width2, $height2);
$source = imagecreatefromjpeg($filename);
imagecopyresized($thumb, $source, 0, 0, 0, 0, $width2, $height2, $width, $height);
imagejpeg($thumb);