renameMediaFilesToDate.py

import os, time
from stat import * # ST_SIZE etc
from os import walk
import datetime

extensions = [".jpeg", ".jpg", ".png", ".mov", ".aae", ".mp4"]

files = []
for (dirpath, dirnames, filenames) in walk("./"):
    files.extend(filenames)
    break

for filename in files:
	try:
	    st = os.stat(filename)
	except IOError:
	    print "failed to get information about", file
	else:
	    # print "file size:", st[ST_SIZE]
	    # modified = time.asctime(time.localtime(st[ST_MTIME]))

	    name, extension = os.path.splitext(filename)
	    extension = extension.lower()
	    if extension not in extensions:
	    	continue

	    # print "file: " + name + extension
	    lastModified = st[ST_MTIME]
	    date = datetime.datetime.fromtimestamp(lastModified)
	    # format = '%Y-%m-%d %H.%M.%S.%f'
	    format = '%Y-%m-%d %H.%M.%S'
	    dateString = date.strftime(format)#[:-3]

	    if filename.startswith(dateString):
	    	continue

	    newName = dateString + extension
	    counter = 1
	    while os.path.isfile(newName):
	    	newName = dateString + "_" + str(counter) + extension
	    	counter = counter+1
	    os.rename(filename, newName)