title: Handling large files with Azure search blob extractor
body: <p>Receiving errors from the Blob extractor that files are too large for the current tier, which is basic.  I will be upgrading to a higher tier, but I notice that the max size is currently 256MB.</p>
  
  <p>When I have PPTX files that are mostly video and audio, but have text I'm interested in, is there a way to index those?   What does the blob extractor max file size actually mean?</p>
  
  <p>Can I tell the extractor to only take the first X MB or chars and just stop?</p>