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#!/usr/bin/env python | |
# Author: Justin Lintz | |
# usage: ./focal_length dir | |
# Requiresments: dcraw http://www.cybercom.net/~dcoffin/dcraw/ | |
import os | |
import sys | |
from subprocess import Popen, PIPE | |
from operator import itemgetter | |
DCRAW='dcraw' # or /path/to/dcraw | |
def count(it): | |
d={} | |
for x in it: | |
d[x]=d.get(x,0)+1 | |
l = d.items() | |
l.sort(key=itemgetter(1),reverse=True) | |
return l | |
def get_focal_length(filename): | |
p = Popen([DCRAW,'-i','-v',filename],stdout=PIPE) | |
for line in p.stdout: | |
if line.startswith('Focal'): | |
length = line.split(':')[1].strip() | |
focal = length[:-2] | |
return focal | |
def get_raw_files(path): | |
file_list = [] | |
for root,dirs,files in os.walk(path): | |
for filename in files: | |
if filename.endswith('CR2'): | |
file_list.append(os.path.join(root,filename)) | |
return file_list | |
def main(path): | |
files = get_raw_files(path) | |
print 'Total pics to process: %d' % len(files) | |
focal_lengths = (get_focal_length(filename) for filename in files) | |
focal_counts = count(focal_lengths) | |
for length,num in focal_counts: | |
print 'Length: %s , Count: %d' % (length,num) | |
return 0 | |
if __name__ == "__main__": | |
path = sys.argv[1] | |
main(path) |
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