[Dvdrtools-users] DVD media different?

[Bob Stia]

Hello,

Trying to burn a movie that I ripped and rebuilt with dvdauthor to a DVD +R 
disk. The file size is reported to be 4.5 gig which should easily fit.  
growisofs complains with the following:

INFO:   UTF-8 character encoding detected by locale settings.
        Assuming UTF-8 encoded filenames on source filesystem,
        use -input-charset to override.
:-( /dev/dvdrecorder: 2295104 blocks are free, 2383008 to be written
:-( write failed: No space left on device
address@hidden:/datastorage> 

How does one determine gigs to blocks??  Are some media manufacturers 
incorrect with the stated capacity?

Bob S