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Google provides free/unlimited storage for both Picasa Web Albums and Google+ users under certain conditions. If you're a Google+ user, you can upload unlimited photos that fit into 2048x2048 pixels and videos not longer than 15 minutes. If you're a Picasa Web Album user without a Google+ registration, you can upload unlimited photos up to 800x800 resolution and videos with a length up to 15 minutes (but obviously these conditions may be subject to change at any time).

However if you upload high resolution photos (or longer than 15m videos) from time-to-time, then these will sooner or later hit the limit which is 1 GB for Picasa Web Albums users at the moment (and optionally you can buy extra storage from Google for a yearly fee). Unfortunately Google does not provide an easy method for users to tell which albums/photos/videos consume that 1 GB (or 80 GB or whatever your quota is).

The attached Python script helps you with this. It should be run from the commandline with a Picasa Web Ablums or Google+ username (or userid) as its first parameter and it'll list all (public) photos and videos that are over the limit for the unlimited storage pool. At the time of writing the limit is 2048 pixels for photographs and 15 minutes (900 seconds) for videos for Google+ users and these are the defaults for the script as well (but you can specify your own limits on the commandline as second and third arguments).

Actually you can use the optional 2nd and 3rd arguments (with a value of zero) to list all photos and videos (it'll print their dimensions and sizes too) in a Picasa Web Albums or Google+ account. Might come handy if you want a full listing of all your (public) uploads.

The username (which is pretty much the same as the mailbox name) of a Google account is not trivial to find out. Recently you'll not find it on Google+ profiles. However you'll find the numeric user ID. If you go into the photos section of a Google+ profile, you'll find the user ID in every link to every album.
Eg. let's take a look on National Geographic's profile. If you go into their photos, you'll find album links like this one: https://plus.google.com/photos/109600806421917664383/albums/5673171928649745297. Here the 109600806421917664383 number is their Google user ID.
And running my script like this:

will list all photos and videos from National Geographic that are over the script's default photo size and video length limits.

P.S.: I've tested this script using Python 2.6.1 (and Mac OS X 10.6.8). But I guess it should run on anything with python 2.6+ (not sure about Python 3.* though).

Attachment	Size
google_photos_over_limit.py	5.44 KB