title: Find all timestamps with empty lines and remove in subtitle/caption file with Regex?
body: <p>I'm looking to remove timestamps (plus the empty lines underneath and number above) for all timestamps that have an empty line beneath them.</p>
  <p>e.g:</p>
  <p>Source</p>
  <pre><code>1
  00:00:00.320 --&gt; 00:00:01.620 align:middle line:-2
  Hello
  
  2
  00:00:01.720 --&gt; 00:00:03.060 align:middle line:-2
  Hey
  
  3
  00:00:03.160 --&gt; 00:00:04.780 align:middle line:-2
  
  
  4
  00:00:04.880 --&gt; 00:00:06.620 align:middle line:-3
  LUKE I AM YOUR FATHER
  
  5
  00:00:06.720 --&gt; 00:00:08.900 align:middle line:-3
  OK
  
  6
  00:00:09.000 --&gt; 00:00:11.020 align:middle line:-3
  
  
  7
  00:00:11.120 --&gt; 00:00:12.980 align:middle line:-3
  COOL
  
  8
  00:00:13.080 --&gt; 00:00:14.460 align:middle line:-2
  OK
  </code></pre>
  <p>Desired output:</p>
  <pre><code>1
  00:00:00.320 --&gt; 00:00:01.620 align:middle line:-2
  Hello
  
  2
  00:00:01.720 --&gt; 00:00:03.060 align:middle line:-2
  Hey
  
  4
  00:00:04.880 --&gt; 00:00:06.620 align:middle line:-3
  LUKE I AM YOUR FATHER
  
  5
  00:00:06.720 --&gt; 00:00:08.900 align:middle line:-3
  OK
  
  7
  00:00:11.120 --&gt; 00:00:12.980 align:middle line:-3
  COOL
  
  8
  00:00:13.080 --&gt; 00:00:14.460 align:middle line:-2
  OK
  </code></pre>
  <p>Is this possible? I've found similar threads but nothing for exactly what I'm after.</p>