ffmpeg_output_concatlist.py

import glob
import os

const_filename_out = "out.mp4"
const_filename_list = "mylist.txt"


def print_mylist():
    with open(const_filename_list, "wt") as flist:
        for f in [flist, None]:
            for i in sum((glob.glob("./*.{}".format(j)) for j in ["avi", "mp4"]), start=[]):
                if not (const_filename_out in i):
                    print("file", "'{}'".format(os.path.abspath(i)), file=f)
            print("# ./ffmpeg -y -f concat -safe 0 -i {l} -af volume=20dB {o}".format(l=const_filename_list, o=const_filename_out))


if __name__ == '__main__':
    print_mylist()