title: How to use filtering and stream copy together with ffmpeg?
body: <pre><code>ffmpeg -ss 0 -t 8  -i  input.mp4  -acodec copy -vcodec copy output.mp4
  </code></pre>
  
  <p>can set codec. However, to filter: </p>
  
  <pre><code>ffmpeg  -i  input.mp4  -vf  crop=100:100:0:0 output.mp4
  </code></pre>
  
  <p>if combined:</p>
  
  <pre><code>Filtergraph 'crop=100:100:0:0' was defined for video output stream 0:0 but codec copy was selected.
  Filtering and streamcopy cannot be used together.
  </code></pre>
  
  <p>how to set codec like time clip?</p>