title: How to calculate size of a GIF image?
body: <p>I want to convert my video 9 seconds to GIF. I choose the following parameters:</p>
  
  <p>FPS: 7 , Scale: original (720x1152).
  In the result I get a gif with size 4.67MB.</p>
  
  <p>Can anybody show me how to guess size of gif depending on input parameters?</p>