title: Chroma key software (script)
body: <p>I have thousands of small videos in HDTV quality. All with green chroma key.
  I need to change green colour for a static image (company logos).</p>
  
  <p>There are several softwares that can change chroma key, but they are only one by one file.
  This will take years to be completed.</p>
  
  <p>Is there a software (script) that I can make this automatic?</p>