title: How to resize and save gif file with Magick++ without animation loss
body: <p>I have next code for resizing images:</p>
  
  <pre><code>Image image;
  image.read( imagePath.toStdString() );
  Geometry newSize = Geometry(m_newSize.width(), m_newSize.height());
  newSize.aspect(true);
  image.resize(newSize);
  image.write(newImagePath.toStdString());
  </code></pre>
  
  <p>This code work fine for non-gif files. For gif files I loss animation:
  <img src="https://i.stack.imgur.com/SRhee.gif" alt="Before resizing gif file"></p>
  
  <p><img src="https://i.stack.imgur.com/0bvkF.gif" alt="After resizng"></p>
  
  <p>How to resize gif files without animation loss?</p>