k3b version version is not able to rip any DVD (tried severals) as transcode (v1.1.7) returns error code 1. Running transcode from command line with the same options gives the same result. I am not familiar with the whole process, so I am not sure which tool/library generates the issue. I am willing to help, if needed!

*k3b log below*

Devices
-----------------------
TSSTcorp CDDVDW SH-S223C SB04 (/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]

System
-----------------------
K3b Version: 2.0.2
KDE Version: 4.9.2
QT Version:  4.8.3
Kernel:      3.6.2-gentoo

Used versions
-----------------------
transcode: 1.1.7

transcode
-----------------------
transcode v1.1.7 (C) 2001-2003 Thomas Oestreich, 2003-2010 Transcode Team
libdvdread: Using libdvdcss version 1.2.12 for DVD access
=== last message repeated 2 times. ===
[[34;1mdvd_reader.c[0m] DVD title 1/1: 10 chapter(s), 1 angle(s), title set 1
[[34;1mdvd_reader.c[0m] title playback time: 02:26:55.18  8816 sec
libdvdread: Using libdvdcss version 1.2.12 for DVD access
=== last message repeated 2 times. ===
[[34;1mdvd_reader.c[0m] DVD title 1/1: 10 chapter(s), 1 angle(s), title set 1
[[34;1mdvd_reader.c[0m] title playback time: 02:26:55.18  8816 sec
[transcode] V: auto-probing     | /dev/sr0 (OK)
[transcode] V: import format    | MPEG 2 program stream in DVD PAL (module=dvd)
[transcode] A: auto-probing     | /dev/sr0 (OK)
[transcode] A: import format    | AC3 in DVD PAL (module=dvd)
[transcode] V: AV demux/sync    | (1) sync AV at initial MPEG sequence
[transcode] V: import frame     | 720x576  1.25:1  encoded @ 4:3
[transcode] V: clip frame (<-)  | 720x576
[transcode] V: zoom             | 768x576  1.33:1 (Lanczos3)
[transcode] V: bits/pixel       | 0.046 (low)
[transcode] V: decoding fps,frc | 25.000,3
[transcode] V: multi-pass       | (mode=1) writing data (pass 1) to /tmp/kde-didomax/k3b_0.log
[transcode] V: video format     | YUV420 (4:2:0) aka I420
[transcode] A: import format    | 0x2000  AC3          [48000,16,2]
[transcode] A: export           | disabled
[transcode] V: encoding fps,frc | 25.000,3
[transcode] A: language         | it
[transcode] A: bytes per frame  | 7680 (7680.000000)
[transcode] A: adjustment       | 0@1000
[transcode] V: IA32/AMD64 accel | sse42 sse41 ssse3 sse3 sse2 sse mmx cmove asm 
[transcode] V: video buffer     | 10 @ 768x576 [0x2]
[transcode] A: audio buffer     | 10 @ 48000x2x16
[import_dvd.so] v0.4.1 (2007-07-15) (video) DVD | (audio) MPEG/AC3/PCM
[export_null.so] v0.1.2 (2001-08-17) (video) null | (audio) null
[export_ffmpeg.so] v0.3.18 (2008-11-29) (video) Lavc53.61.100 | (audio) MPEG/AC3/PCM
libdvdread: Using libdvdcss version 1.2.12 for DVD access
[import_dvd.so] tccat -T 1,-1,1 -i "/dev/sr0" -t dvd -d 0 | tcdemux -a 0 -x ac3 -S 0 -M 1 -d 0 | tcextract -t vob -x ac3 -a 0 -d 0 | tcdecode -x ac3 -d 0 -s 1.000000,1.000000,1.000000 -A 0
[import_dvd.so] tccat -T 1,-1,1 -i "/dev/sr0" -t dvd -d 0 | tcdemux -s 0x80 -x mpeg2 -S 0 -M 1 -d 0 | tcextract -t vob -a 0 -x mpeg2 -d 0 | tcdecode -x mpeg2 -d 0 -y yuv420p
[import_dvd.so] delaying DVD access by 3 seconds
[import_dvd.so] waiting...
libdvdread: Using libdvdcss version 1.2.12 for DVD access
No accelerated IMDCT transform found
libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x0000014e
libdvdread: Elapsed time 0
libdvdread: Found 1 VTS's
libdvdread: Elapsed time 0
[import_dvd.so] waiting...
=== last message repeated 2 times. ===
[export_ffmpeg.so] Using FFMPEG codec 'mpeg4' (FourCC 'DIVX', MPEG4 compliant video).
[export_ffmpeg.so] No profile selected
[export_ffmpeg.so] Error opening configuration file ./ffmpeg.cfg: No such file or directory
[export_ffmpeg.so] Starting 1 thread(s)
[export_ffmpeg.so] Set display aspect ratio to input
[export_ffmpeg.so] Parsing ffmpeg preset 'medium'
[export_ffmpeg.so] File for preset 'medium' not found

transcode command:
-----------------------
/usr/bin/transcode --nice 19 --log_no_color --progress_meter 2 --progress_rate 1469 -i /dev/sr0 -x dvd -T 1,-1,1 -a 0 -j 0,0,0,0 -R 1,/tmp/kde-didomax/k3b_0.log -y ffmpeg,null -o /dev/null -F mpeg4 -w 512 -Z 768x576

Reproducible: Always

Steps to Reproduce:
1. put a dvd into your dvd reader
2. select the option "Rip Video DVD" from the Tools menu
3. error appears in the log window
Actual Results:  
DVD is not ripped


*Gento specific information (emerge --info)*


Portage 2.1.11.31 (default/linux/amd64/10.0/desktop/kde, gcc-4.6.3, glibc-2.15-r3, 3.6.2-gentoo x86_64)
=================================================================
System uname: Linux-3.6.2-gentoo-x86_64-Intel-R-_Core-TM-_i7_CPU_950_@_3.07GHz-with-gentoo-2.2
Timestamp of tree: Sun, 28 Oct 2012 10:45:01 +0000
ld GNU ld (GNU Binutils) 2.23
app-shells/bash:          4.2_p37
dev-java/java-config:     2.1.12
dev-lang/python:          2.7.3-r2, 3.2.3-r1
dev-util/cmake:           2.8.9-r1
dev-util/pkgconfig:       0.27.1
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.11.2
sys-apps/sandbox:         2.6
sys-devel/autoconf:       2.13, 2.69
sys-devel/automake:       1.9.6-r3, 1.11.6, 1.12.4
sys-devel/binutils:       2.23
sys-devel/gcc:            4.6.3
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4.2
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.6 (virtual/os-headers)
sys-libs/glibc:           2.15-r3
Repositories: gentoo
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA skype-eula dlj-1.1 AdobeFlash-10.3 PUEL Oracle-BCLA-JavaSE skype-4.0.0.7-copyright"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -fomit-frame-pointer -march=native "
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -pipe -fomit-frame-pointer -march=native "
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=4 --load-average=8.1 --keep-going"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs candy config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://mirrors.linuxant.fr/distfiles.gentoo.org/ ftp://mirrors.linuxant.fr/distfiles.gentoo.org/ http://mirror.ovh.net/gentoo-distfiles/"
LANG="en_US.UTF8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j4"
PKGDIR="/mnt/auto/capsuleDisk/portageBinPkg"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.de.gentoo.org/gentoo-portage"
USE="X a52 aac acl acpi alsa amd64 berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus declarative dri dts dvd dvdr emboss encode exif fam ffmpeg firefox flac fortran gdbm gif gpm iconv imagemagick ipv6 jpeg kde kipi laptop lcms ldap lm_sensors mad mmx mng modules mp3 mp4 mpeg mpi mudflap multilib ncurses netcdf networkmanager nls nptl nsplugin nvidia ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds pppd qt3support qt4 readline samba sasl sdl semantic-desktop session spell sse sse2 sse3 ssl ssse3 startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vdpau vorbis wifi wxwidgets x264 xcb xcomposite xinerama xml xscreensaver xv xvid xvmc zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="samsung" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" GRUB_PLATFORMS="pc" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON