title: Convert 32 bit png to 8 bit png with ImageMagick by preserving semi transparent pixels
body: <p>I want to convert 32 bit png to 8 bit png with ImageMagick, but semi transparent pixels are lost. How to solve this problem? The command that I am using is the following </p>
  
  <pre><code>convert original.png PNG8:output.png
  </code></pre>