transcode and tccat are hanging

Hello list members

I am trying to rip an ISO which I have mounted using:

$ mount -t udf -o ro,loop /home/my_user/my_dvd.iso /home/my_user/Temp

Both transcode and tccat are hanging when trying to transcode or
trying to scan for the volume rescale value. They are consuming 100%
of cpu. I have tried to run the corresponding command from the
commandline but that shows no useful information as well.

$ tccat  -T 1,-1,1 -i \/home\/my_user\/Temp| dvdrip-splitpipe -f
/dev/null 0 - - | tcextract -a 1 -x ac3 -t vob | tcdecode -x ac3 |
tcscan -x pcm && echo EXECFLOW_OK
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
No accelerated IMDCT transform found
--splitpipe-started--
 0      0     0     0      0   0
[...]
 1    109     9     9     75   3
 1

$ execflow -n 19 transcode -H 10 -a 0 -T 1,-1,1 -x dvd,null -i
\/home\/my_user\/Temp -w 5047,50 -b 128,0,2 --a52_drc_off -f 25.000
--export_par 142,100 -R 1 -y xvid,null -o /dev/null --progress_meter 2
--progress_rate 25 --avi_limit 9999 && echo EXECFLOW_OK
EXEC_FLOW_JOB_PID=19643
transcode v1.1.7 (C) 2001-2003 Thomas Oestreich, 2003-2010 Transcode Team
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
[dvd_reader.c] DVD title 1/11: 21 chapter(s), 1 angle(s), title set 1
[dvd_reader.c] title playback time: 02:03:25.02  7406 sec
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
[dvd_reader.c] DVD title 1/11: 21 chapter(s), 1 angle(s), title set 1
[dvd_reader.c] title playback time: 02:03:25.02  7406 sec
[transcode] V: auto-probing     | /home/my_user/Temp (OK)
[transcode] V: import format    | MPEG 2 program stream in DVD PAL (module=dvd)
[transcode] A: auto-probing     | /home/my_user/Temp (OK)
[transcode] A: import format    | AC3 in DVD PAL (module=null)
[transcode] V: AV demux/sync    | (1) sync AV at initial MPEG sequence
[transcode] V: import frame     | 720x576  1.25:1  encoded @ 16:9
[transcode] V: bits/pixel       | 0.487
[transcode] V: decoding fps,frc | 25.000,0
[transcode] V: multi-pass       | (mode=1) writing data (pass 1) to divx4.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         | en
[transcode] A: bytes per frame  | 7680 (7680.000000)
[transcode] A: adjustment       | 0@1000
[transcode] V: IA32/AMD64 accel | sse41 ssse3 sse3 sse2 sse mmx cmove asm
[transcode] V: video buffer     | 10 @ 720x576 [0x2]
[transcode] A: audio buffer     | 10 @ 48000x2x16
[import_null.so] v0.2.0 (2002-01-19) (video) null | (audio) null
[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_xvid4.so] v0.0.6 (2007-08-11) (video) XviD 1.0.x series (aka
API 4.0) | (audio) MPEG/AC3/PCM
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
[import_dvd.so] tccat -T 1,-1,1 -i "/home/my_user/Temp" -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...
[import_dvd.so] waiting...
[import_dvd.so] waiting...
[export_xvid4.so] warning: Error opening configuration file
./xvid4.cfg: No such file or directory
libdvdread: Using libdvdcss version 1.2.11 for DVD access
libdvdread: Attempting to use device /dev/loop0 mounted on
/home/my_user/Temp for CSS authentication
libdvdread: Could not open /dev/loop0 with libdvdcss.
libdvdread: Can't open /dev/loop0 for reading
libdvdread: Device /dev/loop0 inaccessible, CSS authentication not available.
[decode_mpeg2.c] libmpeg2 acceleration: mmxext
[encoder.c] Delaying audio
encoding=1 frame=25 first=0 last=-1 fps=345.356 done=-1.000000
timestamp=1.000 timeleft=-1 decodebuf=0 filterbuf=0 encodebuf=20
[...]
encoding=1 frame=150 first=0 last=-1 fps=385.133 done=-1.000000
timestamp=6.000 timeleft=-1 decodebuf=7 filterbuf=0 encodebuf=13

My system is running Fedora 16 x68_64 with the following CPU

$ cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Quad  CPU   Q9450  @ 2.66GHz
stepping	: 7
cpu MHz		: 2666.000
cache size	: 6144 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni
dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1
lahf_lm dts tpr_shadow vnmi flexpriority
bogomips	: 5333.39
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

* dvdrip 0.98.11
* transcode v1.1.7

$ uname -va
Linux myhost.mydomain.org 3.1.6-1.fc16.x86_64 #1 SMP Wed Dec 21
22:41:17 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

Any help on this? Thanks in advance!

Regards
Matthias