Rename pictures according to their exif information, taking sequence number into account

pict-exif-rename

#!/usr/bin/env python
# encoding: utf-8

"""
pict-exif-rename: Rename pictures according to their exif information, taking
sequence number into account.

This relies on the presence of the Exif.Panasonic.SequenceNumber tag, so may
not work with all cameras.

Author: Aurélien Gâteau <aurelien.gateau@free.fr>
License: GPLv3+
"""
import os
import sys
from optparse import OptionParser

import pyexiv2

USAGE = "%prog [options] <pict1> [<pict2>...]"

def name_from_metadata(image_name):
    adir = os.path.dirname(image_name)
    metadata = pyexiv2.ImageMetadata(image_name)
    metadata.read()

    date_tag = metadata['Exif.Photo.DateTimeOriginal']
    sequence_tag = metadata['Exif.Panasonic.SequenceNumber']

    new_name = date_tag.value.strftime("%Y-%m-%d_%H-%M-%S")
    sequence = sequence_tag.value
    if sequence > 0:
        new_name += "-n%03d" % sequence
    new_name += ".jpg"

    return os.path.join(adir, new_name)

def main():
    parser = OptionParser(usage=USAGE)
    parser.add_option("--dry-run",
                      action="store_true", dest="dry_run", default=False,
                      help="Dry run, print what would be done")

    (options, args) = parser.parse_args()
    if len(args) < 1:
        parser.error("Missing args")

    for name in args:
        new_name = name_from_metadata(name)
        if new_name == name:
            print "%s: no change" % name
        else:
            print "%s: -> %s" % (name, new_name)
            if not options.dry_run:
                assert not os.path.exists(new_name)
                os.rename(name, new_name)

    return 0

if __name__ == "__main__":
    sys.exit(main())
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