Very simple python script which helps with the renaming and merging process of video parts with the same codec by using ffmpeg

renamer.py

import os # input/output library
import re # regular expressions library
import time # Terminator library

output_file_name = input('Enter output file name FXX_VXX_DD_MM_AAAA: ')

if output_file_name:
    print(f'output file will be named {output_file_name}.MP4')
    shortened_file_names = []

    files_extension = "MTS"
    file_name_regex = r"(\d\.)+MTS"

    output_list_name = f'{str(int(time.time()))}_input.txt'
    f = open(output_list_name, 'w')

    for file_in_folder in os.listdir():
        match = re.search(file_name_regex, file_in_folder)
        if match:
            renamed = match.group(0)
            numeric_value = re.sub(f".{files_extension}", "", renamed)
            double_to_sort = float(numeric_value)
            shortened_file_names.append(double_to_sort)
            os.rename(file_in_folder, f'{str(double_to_sort)}.{files_extension}')
    shortened_file_names.sort()
    for renamed_file in shortened_file_names:
        f.write(f'file \'{str(renamed_file)}.{files_extension}\'\n')
    f.close()

    # Here I went lazy as fuck and created the merger in the renamer
    merge_files = f'ffmpeg -f concat -i {output_list_name} -codec copy {output_file_name}.mp4'
    os.system(merge_files)
else:
    print('please provide a filename')