use video metadata to rename lecture videos downloaded from echo360

rename_echo360_videos.py

import sys
import os
import re
import subprocess
import textwrap
from dateutil.parser import parse

def rename_all(working_dir='.', video_ext='.mpg'):
    filenames = sorted(os.listdir(working_dir))

    for filename in filenames:
        ext = os.path.splitext(filename)[1]

        if ext == video_ext:
            stdoutdata = subprocess.check_output(['avprobe', filename], stderr=subprocess.STDOUT)
            metadata = stdoutdata.decode('utf-8')

            mtitle = re.search(r"title\s*:\s*([^\s].*)\n", metadata)
            mdate = re.search(r"comment\s*:\s*([^\s]*)[\n\s]", metadata)

            if mtitle and mdate and mtitle.groups() and mdate.groups():
                title = mtitle.group(1)
                date = parse(mdate.group(1))

                fullpath = os.path.abspath(filename)
                dirname = os.path.dirname(fullpath)
                
                newname = "{} - {}{}".format(date.strftime("%m-%d-%y"), title, ext)
                os.rename(fullpath, os.path.join(dirname, newname))
                print(textwrap.dedent('''
                    Date: {}
                    Title: {}
                    {}
                    {}'''.format(date, title, fullpath, os.path.join(dirname, newname))))


if __name__ == "__main__":
    if len(sys.argv) == 2:
        rename_all(sys.argv[1])
    else:
        rename_all()