Join mp4 files with ffmpeg

join.py

# join.py
# CC-0
# usage: python3 join.py filename
# all files that start with filename in the current dir will be found, sorted, and joined together with ffmpeg
# mp4 assumed

import os, glob, sys, subprocess
name = sys.argv[1]
print(name)
fileList = glob.glob(name+"*")
fileList.sort()
writeFile = open("tmpffmpeg.tmp","w")
for item in fileList:
  writeFile.write("file '%s'\n" % item)
writeFile.close()

return_code = subprocess.call(["ffmpeg -f concat -safe 0 -i tmpffmpeg.tmp -c copy "+name+".mp4"],shell=True)