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Google Photos backup tool

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Google Photos Sync

Google Photos Sync downloads your Google Photos to the local file system. It will backup all the photos the user uploaded to Google Photos, but also the album information and additional Google Photos ‘Creations’ (animations, panoramas, movies, effects and collages).

After doing a full sync you will have 2 directories off of the specified root:

  • photos - contains all photos and videos from your Google Photos Library organized into folders with the structure ‘photos/YYYY/MM’ where ‘YYYY/MM’ is the date the photo/video was taken. The filenames within a folder will be as per the original upload except that duplicate names will have a suffix ‘ (n)’ where n is the duplicate number of the file (this matches the approach used in the official Google tool for Windows).
  • albums - contains a folder hierarchy representing the set of albums and shared albums in your library. All the files are symlinks to content in one of the other folders. The folder names will be ‘albums/YYYY/MM Original Album Name’.

In addition there will be further folders when using the –compare-folder option. The option is used to make a comparison of the contents of your library with a local folder such as a previous backup. The comparison does not require that the files are arranged in the same folders, it uses meta-data in the files such as create date and exif UID to match pairs of items. The additional folders after a comparison will be:

  • comparison a new folder off of the specified root containing the following:
  • missing_files - contains symlinks to the files in the comparison folder that were not found in the Google Photos Library. The folder structure is the same as that in the comparison folder. These are the files that you would upload to Google Photos via the Web interface to restore from backup.
  • extra_files - contains symlinks into to the files in photos folder which appear in the Library but not in the comparison folder. The folder structure is the same as the photos folder.
  • duplicates - contains symlinks to any duplicate files found in the comparison folder. This is a flat structure and the symlink filenames have a numeric prefix to make them unique and group the duplicates together.

NOTES:

  • the comparison code uses an external tool ‘ffprobe’. It will run without it but will not be able to extract metadata from video files and revert to relying on Google Photos meta data and file modified date (this is a much less reliable way to match video files, but the results should be OK if the backup folder was originally created using gphotos-sync).
  • If the library contains two separate items that have the same exif UID then this will result in seeing one pair of duplicates, plus one of those duplicates will appear in the extra_files list.

Known Issues

A few outstanding limitations of the Google API restrict what can be achieved. All these issues have been reported to Google and this project will be updated once they are resolved.

  • There is no way to discover modified date of library media items. Currently gphotos-sync will refresh your local copy with any new photos added since the last scan but will not update any photos that have been modified in Google Photos. A feature request has been submitted to Google see https://issuetracker.google.com/issues/122737849.
  • Some types of video will not download using the new API. This mostly is restricted to old formats of video file (in my library it is a subset of videos shot before 2010). Google is looking at this problem see https://issuetracker.google.com/issues/116842164
  • The API strips GPS data from images see https://issuetracker.google.com/issues/80379228.
  • Video download transcodes the videos even if you ask for the original file (=vd parameter) see https://issuetracker.google.com/issues/80149160. My experience is that the result is looks similar to the original but the compression is more clearly visible. It is a smaller file with approximately 60% bitrate (same resolution).

Install and configure

To install the latest published version from PyPi, simply:

pipenv install gphotos-sync

Or if you don’t want to use pipenv:

sudo pip install gphotos-sync

To work from the source code, clone the git repository and use pipenv to create a virtual environment and run the code. (if you don’t have pipenv, then I recommend getting it - but you can use ‘sudo python setup.py install’ instead)

git clone https://github.com/gilesknap/gphotos-sync.git
cd gphotos-sync
pipenv install .
pipenv run gphotos-sync

In order to work, gphotos-sync first needs a valid client id linked to a project authorized to use the ‘Photos Library API’. It is not provided in the distribution. Each client id is given a (large) limited number of free API calls to Google Services. If this distribution shared the client id, all users would share this resource limit. This is a little fiddly but only needs to be done once.

To do this:

Also note that for Windows you will need to enable symbolic links permission for the account that gphoto-sync will run under. See Enabling SymLinks on Windows.

How to use it

Once the script is configured, you are now ready to use it using the simple following command line:

gphotos-sync TARGET_DIRECTORY

The first time, it will give you a link to an authorization page in order to authorize the client to access your Google Photos.

For a description of additional command line parameters type:

gphotos-sync --help

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