title: How to add audio to video with node fluent-ffmpeg?
body: <p>I am trying to add audio on top video using ffmpeg </p>
  
  <pre><code>ffmpeg -i sample.mp4 -i sample.mp3 -c copy -map 0:v:0 -map 1:a:0 output.mp4
  </code></pre>
  
  <p>Above code works in my terminal but I would like to use this via ffmpeg node wrapper <code>fluent-ffmpeg</code></p>
  
  <p>This code is not working and it also not throwing any error</p>
  
  <pre><code>ffmpeg()
      .input('DATA/sample.mp4')
      .input('DATA/sample.mp3')
      .videoCodec('copy')
      .outputOptions(['-map 0:v:0', '-map 1:a:0'])
      // .outputOption('-map 1:a:0')
      .save('node.mp4') 
  </code></pre>