title: FFMPEG - Batch convert subfolders
body: <p>I am trying to set up a Windows batch file to convert a number of MP4 files using FFMPEG. There are a number of files in multiple subfolders, therefore I need the script to execute on each file in each subfolder. </p>
  
  <p>I'm afraid I don't have much experience of using batch files but from my research I've got the following command text:</p>
  
  <pre><code>FOR %%i in (*.mp4) /R DO (ffmpeg32 -i "%%~ni.mp4" -map 0:0 -map 0:1 -map 0:1    -c:v copy   -c:a:0 aac -b:a 128k -ac 2 -strict -2 -cutoff 15000  -c:a:1 copy "%~ni&amp;(2).mp4")
  </code></pre>
  
  <p>The script basically needs to add an AAC audio stream to an existing MP4 file, therefore I need to change the output name by adding a (2) at the end of the filename.</p>
  
  <p>I've tested the ffmpeg command separately so happy that it works - I just need to get the correct batch commands.</p>
  
  <p>Thanks in advance for any pointers!</p>
  
  <p>Cheers</p>