How to resize and save an animated GIF with ImageMagick?

Question

PHP

This example doesn't work GIF is not animated

$imagick = new Imagick($_FILES['file']['tmp_name']);

$format = $imagick->getImageFormat();
if ($format == 'GIF') {
  $imagick = $imagick->coalesceImages();
  do {
     $imagick->resizeImage(500, 500, Imagick::FILTER_BOX, 1);
  } while ($imagick->nextImage());
  $imagick = $imagick->deconstructImages();
  $imagick->writeImages($name, true);

}

$imagick->clear();
$imagick->destroy();

Answer 1

If this is an animated gif, you will have to split it into frames, resize them, and then peck a new gif. Another option is to exec system tools with which such shamanism is not necessary.