par2create ought to accept absolute amount of redundancy to create, as well as percentage

Currently, one uses -r to specify the % of the original to create; eg

         par2create -r5 foo.mpg

for 5% redundancy. But overhead and imprecise calculating of what exactly percent one wants can mean that one goes overboard and makes too much redundancy to fit on a CD/DVD/backup medium or makes too little (frequently I waste a good 100MB on DVDs because I need to leave a fudge factor; 100MB could've corrected a lot of errors).

Better would be if one could specify how many megabytes or kilobytes to make, so if one has 4 gigs of data to protect, one could do something like

       par2create -r200MB *

and wind up with the exact 4.2 gigs and no wasted space.