ImageMagick bottom copyright bar

Adding a copyright bar to any image is very simple with ImageMagick. Taken this example image:


And if you want something like this (with a copyright and an added timestamp):


You can use this oneliner for bash:

$ convert [input.jpg] -gravity north -background black -extent +0+20 +repage -box black -fill white -pointsize 12 -gravity southwest -annotate +3+3 '(c)Unicorns and magic sparkledust inc.' -gravity southeast -annotate +3+3 "`date +%H:%I`" -quality 99% output.jpg