title: FFMPEG: crop a video without losing the quality
body: <p>I have mp4 video of <code>1920x1080</code>. I would like to crop the video to <code>480x270</code> <strong>without quality loss</strong>.</p>
  
  <p>I am using the following command:</p>
  
  <pre><code>ffmpeg -i input.mp4 -filter:v "crop=480:270:200:200" -crf 23 output.mp4
  </code></pre>
  
  <p>I also tried:</p>
  
  <pre><code>ffmpeg -i input.mp4 -filter:v "crop=480:270:200:100" -c:a copy -qp 0 output.mp4
  </code></pre>
  
  <p>I used <code>-crf 23</code> and <code>-qp 0</code> for loseless video cropping, but after cropping video has lost quality. </p>
  
  <p>Does anyone know how I can crop the video <strong>without losing</strong> the quality?</p>