title: FFMpegCore C# custom args
body: <p>I am evaluating using FFMpegCore C# to do some video manipulations.  I am not seeing a way of passing in a custom argument string.  I fear the answer is staring right at me but I definitely read all documentation and cannot find a way to do it.</p>
  <p>Below my signature is the string I would like to pass in, though it should not matter.  Anyone know how to pass a custom string arguments to FFMpegCore C#?</p>
  <p>Thanks, Dan</p>
  <pre><code>public static string GetFlipBookArgs(string convertedVideoFilePath, int frameCountCalc, string flipbookFilePath)
  {
      return $&quot;-y -i \&quot;{convertedVideoFilePath}\&quot; -vf \&quot;select = not(mod(n\\, {frameCountCalc})),scale = 128:128,tile = 4x4\&quot; -frames:v 1 -q:v 10 \&quot;{flipbookFilePath}\&quot;&quot;;
  }
  </code></pre>