title: Win/Batch | Run all commands in the batch file at same time
body: <p>I have a simple batch file:</p>
  
  <pre><code>@echo off 
  ffmpeg -i source1 -o output
  ffmpeg -i source2 -o output
  ffmpeg -i source3 -o output
  </code></pre>
  
  <p>Problem is that when I launch my .bat file it runs first command only and won't start second one until the first one is finished and so on.</p>
  
  <p>How do I trigger all three at same time when double clicking the .bat file? (which means they would need somehow to open on separate cmd window for each).</p>