wallb is wallpaper background slideshow maker for Ubuntu and derivatives
install wallb and use it to make wallpaper slideshows
use wallb --help for options
$ python wallb --help
usage: wallb [-h] [-d DIRECTORY] [-s STATIC] [-t TRANSITION] [-v] name
Make background wallpaper slideshow
positional arguments:
name name of slideshow
optional arguments:
-h, --help show this help message and exit
-d DIRECTORY, --directory DIRECTORY
directory containing images
-s STATIC, --static STATIC
static time intevral in seconds
-t TRANSITION, --transition TRANSITION
transition time intevral in seconds
-v, --verbose verbose
sudo permissions might be needed to create directory and files
wallb creates /usr/share/backgrounds/{name} directory,
/usr/share/backgrounds/contest/{name}.xml and
/usr/share/gnome-background-properties/{name}-wallpapers.xml