add_exif_datetime.py

#!/usr/bin/env python

import sys
import os
import stat
import datetime
import pyexiv2

argvs = sys.argv
argc = len(argvs)

if (argc < 3):
	print 'Usage: python %s filename YYYY:MM:DD HH:II:SS' % argvs[0]
	quit()

filename = argvs[1]
yyyymmdd = argvs[2]

if (argc == 3):
	hhiiss = '00:00:00'
else:
	hhiiss = argvs[3]

date = yyyymmdd.split(':')
time = hhiiss.split(':')

image_date = datetime.datetime(int(date[0]), int(date[1]), int(date[2]), int(time[0]), int(time[1]), int(time[2]))

img = pyexiv2.ImageMetadata(filename)
img.read()
img['Exif.Photo.DateTimeOriginal'] = image_date
img.write()

print img['Exif.Photo.DateTimeOriginal']