Volume ID using mkisofs and cdrecord

Question

I'm trying to specify the volume id of a cd/dvd when using mkisofs and cdrecord afterwards. I figured out that there's an option -V volumeid of mkisofs. The manpage says that 32 characters can be given here. Unfortunately, it seems that those 32 characters are padded, even though my given volume id has less than 32 characters (padded with spaces). IMHO this is really ugly.

Is there any way to prevent mkisofs or cdrecord, respectively, from padding the volume id?

My call to mkisofs is mkisofs -V "MyDVD" -J -R -o foo.iso

My call to cdrecord is cdrecord -dao dev=/dev/dvd foo.iso

Any suggestions welcome and appreciated.

Kind regards.