nice message when there is no movie file

napi

@@ -35,7 +35,12 @@ if(len(sys.argv)==1):
 
 d = md5.new()
 movie_filename = sys.argv[1]
-d.update(open(movie_filename).read(10485760))
+try:
+	with open(movie_filename, "r") as movie_file:
+		d.update(movie_file.read(10485760))
+except IOError:
+	print "%s: No such file" % movie_filename
+	sys.exit(2)
 
 def download_subtitles(digest):
 	request_data = {