Using a procedure like (where the source is im_src, target is im_target, both saved at 150 dpi):

$im_src = imagecreatefromjpeg($foto_defunto);
$im_target = imagecreatefromjpeg($foto_template);


ImageCopy ($im_target, $im_src, $foto_hpos, 10, 0, 0, $width, $height);

$black = imagecolorclosest ($im_target,0,0,0);

ImageTTFText ($im_target, 16, 0, CANVAS_TEXT_HPOS, CANVAS_TEXT_VPOS, -$black, "Verdana.ttf","Impresa: " . $of_name);
ImageTTFText ($im_target, 16, 0, CANVAS_TEXT_HPOS, CANVAS_TEXT_VPOS+30, -$black, "Verdana.ttf","Nome: " . $nome_defunto);

Imagejpeg($im_target,'',100);
ImageDestroy($im_src);
ImageDestroy($im_target);

------- the problem --------

The output (through the function 'Imagejpeg') to the video (in the example above) or in a file will be only set to 72 dpi.