title: what exactly mean 2160p, 1440p, 1080p, ... 144p?
body: <p>I need to tag each video i receive with either 2160p, 1440p, 1080p, ... 144p. But what is the exact definition of it ?</p>
  
  <p>I know the definition of wikipedia :</p>
  
  <pre><code>2160p=3840x2160
  1440p=2560×1440
  1080p=1920×1080 
  720p=1280×720   
  480p=640×480    
  360p=480×360    
  240p=426×240    
  144p=256×144    
  </code></pre>
  
  <p>ok, but with tag to assign to a video of for example <code>1200x700</code> ? <code>720p</code> or <code>480p</code> ?
  Same for a resolution of <code>1920x480</code>, did i need to assign a resolution of <code>480p</code> or <code>720p</code> or <code>1080p</code> ?</p>