title: FFmpeg avformat_open_input with memory located file
body: <p>I want to decode an internet-audiostream, but I don't want to write the data to disk, so the data is located in the memory only. </p>
  
  <p>But when I want to decode data to raw-data, I must initialise the format-context and so I need to use avformat_open_input. But these function needs a detailed location of the file.</p>
  
  <p>Have anyone a solution, how I can get my memory located data into the format-context to decode this data to a raw data? </p>