title: Reverse video and loop 2 times ffmpeg
body: <p>I need to reverse the input video and concat it then the loop the output video twice. 
  I was able to achieve reversing and concat it with original video using </p>
  
  <p><code>ffmpeg -i input.mkv -filter_complex "[0:v]reverse,fifo[r];[0:v][r] concat=n=2:v=1 [v]" -map "[v]" output.mkv</code> </p>
  
  <p>But i want to stream_loop it 3 times. And also i like to know, if there's any better ways to do it. The video will be a small one(4 seconds max.) and without audio.</p>