Python script to batch convert media files with ffmpeg

batchconvert.py

import sys
import os
import subprocess

arguments = sys.argv[1:] # py batchconvert.py [input directory] [output directory] [target file extension] [additional arguments]

if(arguments == []):
    print(
        """    Usage: 
    py batchconvert.py [input directory] [output directory] [target file extension] [additional arguments]"""
    )
    sys.exit()

try:
    input_directory = arguments[0]
except:
    print("Missing input directory, run script without arguments for help")
    sys.exit()

try:
    output_directory = arguments[1]
except:
    print("Missing output directory, run script without arguments for help")
    sys.exit()

try:
    target_extension = arguments[2]
except:
    print("Missing target file extension, run script without arguments for help")
    sys.exit()

try:
    additional_args = arguments[3]
except: 
    additional_args = ""

if(input_directory[-1] != "/"):
    input_directory = input_directory + "/"

if(output_directory[-1] != "/"):
    output_directory = output_directory + "/"

input_files_list = os.listdir(input_directory)
for filename in input_files_list:
    ffmpeg_command = f"ffmpeg -i \"{input_directory + filename}\" \"{output_directory + filename + "." + target_extension}\" {additional_args}"
    subprocess.run(ffmpeg_command)