code: def transcribe(decoder, audio_file, libdir=None):
      
      decoder = get_decoder()
  
      decoder.start_utt()
      stream = open(audio_file, 'rb')
      while True:
          buf = stream.read(1024)
          if buf:
              decoder.process_raw(buf, False, False)
          else:
              break
      decoder.end_utt()
      return evaluate_results(decoder)
docs: Decode streaming audio data from raw binary file on disk.