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