title: get frame from binary data with python
body: <p>I have <strong>Binary string</strong> of mp4 file (from database).</p>
  
  <p>I'd Like to get frame (thumbnail) of video from this string and save as binary string (in database).</p>
  
  <p>Is there library, that would have method that takes <strong>binary data</strong> as an input, <strong>not file name</strong> </p>
  
  <p>Or maybe there is a way to save binary data as buffer or something and work with that as file, without saving it on hard drive or server..</p>