video-length.py: sums the duration of all video files passed as arguments using ffmpeg

video-length.py

#!/usr/bin/env python3
# video-length.py: sums the duration of all video files passed as arguments using ffmpeg

import subprocess
import sys
import datetime

files = sys.argv[1:]

CMD = "ffmpeg -i file:\"%s\" 2>&1 | grep Duration | cut -d ' ' -f 4 | sed s/,//"

times = []
for f in files:
    r = subprocess.run(CMD % f, shell=True, stdout=subprocess.PIPE)
    times.append(r.stdout.decode().strip())

def sumTimes(timeList):
    delta = datetime.timedelta(seconds=0)
    for t in timeList:
        h, m, s = t.split(":")
        delta += datetime.timedelta(hours=float(h))
        delta += datetime.timedelta(minutes=float(m))
        delta += datetime.timedelta(seconds=float(s))
    return str(delta)


print(sumTimes(times))