How to determine amount of available storage space on a blank DVD in bash?

Question

I was wondering if there was a way to determine the amount of space available in a blank writable DVD using a bash command.

Answer 1

Maybe use dvd+rw-mediainfo out of dvd+rw-tools and parse its output?

Answer 2

If you mount the DVD and use the df command this will show you the amount of free space for all devices.

If you'd like a more readable format you can also use df -h.