title: How to compress output file using FFmpeg - Apple ProRes 422
body: <p>I am new to video encoding and trying to encode a music video for the apple itunes video store.</p>
  
  <p>I am currently using FFmpeg for encoding.</p>
  
  <p>My source file is mp4 file type and  file size=650MB</p>
  
  <p>I encode the file using the Apple ProRes 422 (HQ) codec and output a mov file.</p>
  
  <pre><code>ffmpeg -y -i busy1.mp4  -vcodec prores -profile:v 3 -r "29.97" -c:a mp2   busy2.mov
  </code></pre>
  
  <p>I am trying to encode the video according to the following specs:</p>
  
  <p>● Apple ProRes 422 (HQ)
  ● VBR expected at ~220 Mbps</p>
  
  <p>Encoded PASP    Converted to ProRes From
  1920 x 1080 1:1 HDCAM SR, D5, ATSC
  1280 x 720  1:1 ATSC progressive</p>
  
  <p>29.97 interlaced frames per second for video sourced</p>
  
  <p>Music Video Audio Source Profile</p>
  
  <p>● MPEG-2 layer II stereo
  ● 384 kpbs
  ● 48Khz</p>
  
  <p>The file is encoded perfectly fine however the output is 6Gb in size.</p>
  
  <p>Why would the file be so large after encoding?</p>
  
  <p>Am I doing something wrong here?</p>