yar

# Usage: ffmpeg $(( echo input1.mp4; echo input2.mp4 ) | python3 concat_overlapping_video_framemd5_demuxer.py concat_file.txt) -y -an output.mp4

import os
import sys
import subprocess

ffmpeg_concat_file, md5_last_frame = open(sys.argv[1], 'w'), None
for video_path in map(os.path.abspath, list(map(str.strip, sys.stdin))):
        framemd5 = subprocess.check_output(['ffmpeg', '-nostats', '-hide_banner', '-i', video_path, '-an', '-f', 'framemd5', '-c', 'copy', '-'], stderr = open(os.devnull, 'w'))
        inpoint, tb_num, tb_den = 0, 1, 1