title: FFmpeg ignores quantity parameter
body: <p>this is how I use FFmpeg</p>
  
  <pre class="lang-sh prettyprint-override"><code>ffmpeg -f dshow -i video="UScreenCapture" -vcodec libx264 -q 26 -f flv output.flv
  </code></pre>
  
  <p>the thing is, the quantity is always 28, ffmpeg ignores that. How to fix this? I need a "flash" codec anyway, to stream to twitch tv</p>