Even if you have only one bar code, it is read by zbar multiple times (line by line). After a given number of repetitions a code is considered valid. So there's no way to tell, how many bar codes are actually on the picture. At least no easy way.
45.01 change auditory icons to play, because native mode stops emacspeak, playing icons in foreground
uploading picture for the icon (gimp)
tagged release 45.00