import time
import logging
import os
import stat

ext = ['mpg', 'avi', 'mp4', 'nuv', 'mpeg', 'mov']

def now():
    return time.strftime("%Y-%m-%d %H:%M:%S");

def log(msg):
    logging.log(logging.DEBUG, msg)
    new_msg = "[%s] %s" % (now(), msg)
    return new_msg


bin_path_list = os.environ["PATH"].split(os.pathsep)
def which(prg):
    for d in bin_path_list:
        path = os.path.join(d, prg)
        if os.path.exists(path):
            st = os.stat(path)
            if st[stat.ST_MODE] & 0111:
                return path
    return ""

def list_media_files(directory, file_list):
    for root, dirs, files in os.walk(directory):
        for name in files:
            if os.path.splitext(name)[1].strip(".") in ext:
                media = os.path.join(root,name)
                if media not in file_list:
                    file_list.append(os.path.join(root,name))

    return True