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#!/usr/bin/env python
# python-gphoto2 - Python interface to libgphoto2
# http://github.com/jim-easterbrook/python-gphoto2
# Copyright (C) 2015-22 Jim Easterbrook jim@jim-easterbrook.me.uk
#
# This file is part of python-gphoto2.
#
# python-gphoto2 is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# python-gphoto2 is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with python-gphoto2. If not, see
# <https://www.gnu.org/licenses/>.
# read just enough of an image to decode the Exif data
import locale
import logging
import os
import sys
from gi.repository import GObject, GExiv2
import gphoto2 as gp
def list_files(camera, path='/'):
result = []
# get files
for name, value in camera.folder_list_files(path):
result.append(os.path.join(path, name))
# read folders
folders = []
for name, value in camera.folder_list_folders(path):
folders.append(name)
# recurse over subfolders
for name in folders:
result.extend(list_files(camera, os.path.join(path, name)))
return result
def get_file_exif_normal(camera, path):
# a 32k buffer is large enough for my Canon EOS 100D and A1100 IS
# use a bigger buffer if you get "GExiv2: unsupported format" errors
buf = bytearray(32 * 1024)
folder, file_name = os.path.split(path)
camera.file_read(folder, file_name, gp.GP_FILE_TYPE_NORMAL, 0, buf)
md = GExiv2.Metadata()
md.open_buf(buf)
return md
def get_file_exif_metadata(camera, path):
# this doesn't work for me as from_app1_segment wants a pointer to a
# single byte but then tries to read beyond it, causing a segfault
folder, file_name = os.path.split(path)
cam_file = camera.file_get(
folder, file_name, gp.GP_FILE_TYPE_EXIF)
md = GExiv2.Metadata()
file_data = cam_file.get_data_and_size()
data = bytes(file_data)
md.from_app1_segment(data, len(data))
return md
def main():
locale.setlocale(locale.LC_ALL, '')
logging.basicConfig(
format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
callback_obj = gp.check_result(gp.use_python_logging())
camera = gp.Camera()
camera.init()
files = list_files(camera)
if not files:
print('No files found')
return 1
print('File list')
print('=========')
for path in files[:10]:
print(path)
print('...')
for path in files[-10:]:
print(path)
print()
print('Exif data via GP_FILE_TYPE_NORMAL')
print('=================================')
for path in files:
if os.path.splitext(path)[1].lower() != '.jpg':
continue
md = get_file_exif_normal(camera, path)
for key in ('Exif.Photo.DateTimeOriginal', 'Exif.Image.Model', 'Exif.Image.Copyright'):
if key in md.get_exif_tags():
print(key, ':', md.get_tag_string(key))
break
print()
print('Exif data via GP_FILE_TYPE_EXIF')
print('===============================')
for path in files:
if os.path.splitext(path)[1].lower() != '.jpg':
continue
md = get_file_exif_metadata(camera, path)
for key in ('Exif.Photo.DateTimeOriginal', 'Exif.Image.Model', 'Exif.Image.Copyright'):
if key in md.get_exif_tags():
print(key, ':', md.get_tag_string(key))
break
print()
camera.exit()
return 0
if __name__ == "__main__":
sys.exit(main())
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