Concurrent conversion of video files with ffmpeg

gistfile1.txt

#!/usr/bin/env python3
import os
import sys
import subprocess
import datetime
import time
from multiprocessing import Pool


def convert_to_iso_mp4(params):
    srcfile, outfile, destdir = params
    outpath = os.path.join(destdir, outfile)
    if os.path.exists(outpath):
        print(f"The file {outpath} is already processed")
        return

    cmd = f"ffmpeg -i {srcfile} -vcodec libx264 -profile:v main -level 3.1 -preset slower -crf 18 -x264-params ref=4 -acodec copy -movflags +faststart {outpath}"
    subprocess.check_call(cmd.split())

    d = srcfile.split("_")[1]
    do = datetime.datetime.strptime(d, "%Y%m%d%H%M%S")
    dt = time.mktime(do.timetuple())
    os.utime(outpath, (dt, dt))


def main():
    filelist = sys.argv[1]
    destdir = sys.argv[2]
    print("Working on", filelist)
    print("Will save to", destdir)
    jobs = []
    for l in open(filelist, "r"):
        # Ignore commented lines
        if not l.startswith("#"):
            infile = l.strip()
            outfile = f"ios_{infile}"
            jobs.append(
                (
                    infile,
                    outfile,
                    destdir,
                )
            )
    with Pool(6) as p:
        p.map(convert_to_iso_mp4, jobs)


if __name__ == "__main__":
    main()