title: FFMPEG's FLAC Compression Levels & Defaults Settings
body: <p>I have searched for the documentation on this but found no information.</p>
  
  <p>I'm using the latest FFMPEG nightly build in Windows 10 Insider Build (also latest) 64 Bit.</p>
  
  <p>I need to know how to define the compression level of FLAC files.</p>
  
  <p>Also, by default does FFMPEG change anything in the FLAC files.
  Here's an example: Let's say I have an unaltered source FLAC file that I convert to FLAC again inside FFMPEG what will change by default when it processes it? Is there any way to make sure FFMPEG does not alter the original quality? I'm aware that FLAC is lossless but I thought it might change the bit depth or bit rate.</p>