code: def main(argv):
      if len(argv) == 4:
          files = getVideoFilesFromFolder(argv[1])
          samplingRate = int(argv[2])
          channels = int(argv[3])
  
          for f in files:
              ffmpegString = (
                  "ffmpeg -i "
                  + '"'
                  + f
                  + '"'
                  + " -ar "
                  + str(samplingRate)
                  + " -ac "
                  + str(channels)
                  + " "
                  + '"'
                  + os.path.splitext(f)[0]
                  + '"'
                  + ".wav"
              )
              os.system(ffmpegString)
  
label_desc: Use image node_id 2 for calling a global function with example usage: main(argv) without return types