ffmpeg: merge multiple MP4 files, it's necessary to pass by .ts files

concatenate-media-files.py

import os
import subprocess
import glob


def main():
    tsFileList = []
    # consider only .mp4 files
    files = glob.glob('*.mp4')
    for file in files:
        # file transcode to MPEG-2 TS
        subprocess.call(['ffmpeg', '-i', file, '-c', 'copy', '-bsf:v', 'h264_mp4toannexb', '-f', 'mpegts', file+'.ts'])
        tsFileList.append(file+'.ts')

    process(tsFileList)


def process(tsFileList):
    input = ''
    for eachfile in tsFileList:
        input += eachfile + '|'
    # concatenation
    subprocess.call(['ffmpeg', '-i', 'concat:' + input, '-c', 'copy', '-bsf:a', 'aac_adtstoasc', 'output.mp4'])
    
    # remove all .ts files 
    for eachfile in tsFileList:
        os.remove(eachfile)
    print("done!")


main()