title: Video created with ffmpeg does not playing in Windows media player
body: <p>Issue: Video is not playing with Windows Media Player while its successfully playing with VLC player, Google Chrome browser.</p>
  
  <p>Below are the details that I am using:
  1. npm "fluent-ffmpeg" version: "2.1.2" in node application.
  2. node version 8.11.3.
  3. FFmpeg version: 20161230-6993bb4 downloaded from <a href="http://ffmpeg.zeranoe.com/builds" rel="nofollow noreferrer">http://ffmpeg.zeranoe.com/builds</a>.
  4. Set path to ffmpeg.exe to in path on system environment.
  5. Here is the sample code.</p>
  
  <pre><code>let command = new ffmpeg({ source: 'rtsp://192.168.2.198/cam0_1' }), fileName = 'abc.mp4';
  
  // Record video from camera.
  command.inputFPS(20)
    .duration(10)
    .on('start', function () {
      console.log('Recording started.', ('File: ' + fileName));
    })
    .on('end', function () {
      console.log('Recording completed.', ('File: ' + fileName));
    })
    .on('error', function (err, stdout, stderr) {
      console.log('An error occurs while recording.', ('File: ' + fileName), err.message, stdout, stderr);
    })
    .format('mp4')
    .save(fileName);
  </code></pre>