title: How to add an image or text (Watermark) on a video/image - Flutter/Dart
body: <p>I'm building a <code>Flutter</code> application which needs to add waermark on videos and images.
  Is there any way to achieve this with <code>firebase</code> (or any other service)? I could do this on <code>client-side</code> but also there i can't find any flutter/Dart package related to video/image processing.</p>
  
  <p>Kindly guide me how to do it.</p>
  
  <p>Thanks</p>