K3b appears to be great, nice GUI and seems simple to use. The only snag is I can't get it to work - I got the (below) Error Report which I don't understand, can someone kindly help me?
Devices
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HL-DT-ST DVDRAM GT10N 1.00 (/dev/sr0, CD-R, CD-RW, CD-ROM, DVD-ROM, DVD-R, DVD-RW, DVD-R DL, DVD+R, DVD+RW, DVD+R DL) [DVD-ROM, DVD-R Sequential, DVD-R Dual Layer Sequential, DVD-R Dual Layer Jump, DVD-RAM, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Restricted Overwrite, Layer Jump] [%7]

K3b::IsoImager
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mkisofs print size result: 0 (0 bytes)

System
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K3b Version: 2.0.2
KDE Version: 4.13.3
QT Version: 4.8.6
Kernel: 3.16.0-31-lowlatency

Used versions
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mkisofs: 1.1.11

mkisofs
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/usr/bin/genisoimage: No such file or directory. Failed to open VIDEO_TS.IFO
/usr/bin/genisoimage: Can't open VMG info for '/tmp/kde-ray/k3bVideoDvd0/'.
/usr/bin/genisoimage: Unable to parse DVD-Video structures.
/usr/bin/genisoimage: Could not find correct 'VIDEO_TS' directory.
Possible reasons:
- VIDEO_TS subdirectory was not found on specified location
- VIDEO_TS has invalid contents

mkisofs calculate size command:
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/usr/bin/genisoimage -gui -graft-points -print-size -quiet -volid Eternal Sunshine of the Spotless -volset -appid K3B THE CD KREATOR (C) 1998-2010 SEBASTIAN TRUEG AND MICHAL MALEK -publisher -preparer -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/kde-ray/k3bIf3455.tmp -no-cache-inodes -udf -iso-level 1 -path-list /tmp/kde-ray/k3boN3455.tmp -dvd-video -f /tmp/kde-ray/k3bVideoDvd0

K3b can't rip commercial drm encoded dvds