title: crf is not recognized in loops with find
body: <p>if i use &quot;find&quot; to encode all files in subdirectories the option crf is not recognized at all. If i use &quot;find&quot;, the picture quality is poor because, i think, he uses a predefined  worse option. If i use ffmpeg without &quot;find&quot;, the option works.
  for example
  works:
  <code>ffmpeg -i 1.mkv -c:v libx265 -tune grain -x265-params crf=20 -map 0:v -map 0:a -c:a copy -map 0:s? -c:s copy -disposition:s:0 0 out.mkv</code></p>
  <p>works not:
  <code>find ./ -name '*.mkv' -exec bash -c 'ffmpeg -i &quot;$0&quot; -c:v libx265 -tune grain -x265-params -crf=20 -map 0:v -map 0:a -c:a copy -map 0:s? -c:s copy -disposition:s:0 0 &quot;${0%%.mkv}.MKV&quot;' {} \;</code></p>
  <p>What's the problem with the line in find? Everything in find works, only the crf option does not work.</p>
  <p>Greetings
  Hondo</p>