pete@pete-System-Product-Name:~$ apt-cache search kdenlive | grep dbg
kdenlive-dbg - a non-linear video editor (debugging symbols)
pete@pete-System-Product-Name:~$ gdb kdenlive
GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /usr/bin/kdenlive...Reading symbols from /usr/lib/debug/usr/bin/kdenlive...done.
done.
(gdb) run
Starting program: /usr/bin/kdenlive 
[Thread debugging using libthread_db enabled]
[New Thread 0xb26e3b70 (LWP 4503)]
[New Thread 0xb1cffb70 (LWP 4504)]
project monitor connected 
clip monitor connected 
QWidget::insertAction: Attempt to insert null action
QWidget::insertAction: Attempt to insert null action
[New Thread 0xad0edb70 (LWP 4505)]
[New Thread 0xac8ecb70 (LWP 4506)]
[Thread 0xb26e3b70 (LWP 4503) exited]
[New Thread 0xb26e3b70 (LWP 4508)]
[New Thread 0xab0e9b70 (LWP 4512)]
[New Thread 0xaa8e8b70 (LWP 4515)]
[Thread 0xad0edb70 (LWP 4505) exited]
[Thread 0xac8ecb70 (LWP 4506) exited]
[New Thread 0xac8ecb70 (LWP 4516)]
[New Thread 0xad0edb70 (LWP 4517)]
[Thread 0xac8ecb70 (LWP 4516) exited]
[Thread 0xad0edb70 (LWP 4517) exited]
[New Thread 0xad0edb70 (LWP 4518)]
[New Thread 0xac8ecb70 (LWP 4519)]
[Thread 0xaa8e8b70 (LWP 4515) exited]
[New Thread 0xaa8e8b70 (LWP 4521)]
//STARTING RENDERING:  true , false , "/usr/bin/melt" , "hdv_1080_50i" , "avformat" , "vlc %U" , "/tmp/kde-pete/kdenliveck4490.mlt" , "/home/pete/29new.mpg" , () , ("f=mpeg", "acodec=mp2", "ab=384k", "ar=48000", "vcodec=mpeg2video", "minrate=0", "vb=12000k", "bf=2", "b_strategy=1", "trellis=1", "aspect=@16/9", "threads=1", "real_time=-1") , -1 , -1 
Started render process:  "/usr/bin/melt"   "/tmp/kde-pete/kdenliveck4490.mlt -profile hdv_1080_50i -consumer avformat:/home/pete/29new.mpg progress=1 f=mpeg acodec=mp2 ab=384k ar=48000 vcodec=mpeg2video minrate=0 vb=12000k bf=2 b_strategy=1 trellis=1 aspect=@16/9 threads=1 real_time=-1" 
"Rendering of /home/pete/29new.mpg aborted, resulting video will probably be corrupted." 
^C
Program received signal SIGINT, Interrupt.
0xb7fdf424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fdf424 in __kernel_vsyscall ()
#1  0xb5d0e40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb575934b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb574a896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb574ac2a in g_main_context_iteration ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb672eada in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#6  0xb6b05e3a in ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
#7  0xb66ff1dd in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#8  0xb66ff421 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/i386-linux-gnu/libQtCore.so.4
#9  0xb670419d in QCoreApplication::exec() ()
   from /usr/lib/i386-linux-gnu/libQtCore.so.4
#10 0xb6a4b8f4 in QApplication::exec() ()
   from /usr/lib/i386-linux-gnu/libQtGui.so.4
#11 0x08086add in main (argc=Cannot access memory at address 0xd
)
    at /build/buildd/kdenlive-0.8.3+git20120115.5146194b/src/main.cpp:89
(gdb) ^CQuit
(gdb) thread apply all bt

Thread 13 (Thread 0xaa8e8b70 (LWP 4521)):
#0  0xb7fdf424 in __kernel_vsyscall ()
#1  0xb653fa5c in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb75869a9 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#3  0xb75869ef in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb653bd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#5  0xb5d1d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 12 (Thread 0xac8ecb70 (LWP 4519)):
#0  0xb7fdf424 in __kernel_vsyscall ()
#1  0xb653fa5c in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/i386-linux-gnu/libpthread.so.0
#2  0xaf0f6f4a in ?? () from /usr/lib/mlt/libmltsdl.so
#3  0xb653bd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#4  0xb5d1d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 11 (Thread 0xad0edb70 (LWP 4518)):
---Type <return> to continue, or q <return> to quit---
#0  0xb7fdf424 in __kernel_vsyscall ()
#1  0xb653fe04 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb6587cbf in mlt_consumer_get_frame () from /usr/lib/libmlt.so.4
#3  0xb65887a1 in mlt_consumer_rt_frame () from /usr/lib/libmlt.so.4
#4  0xaf0f785e in ?? () from /usr/lib/mlt/libmltsdl.so
#5  0xb653bd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0xb5d1d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 7 (Thread 0xab0e9b70 (LWP 4512)):
#0  0xb7fdf424 in __kernel_vsyscall ()
#1  0xb5d15ed1 in select () from /lib/i386-linux-gnu/libc.so.6
#2  0xb66df714 in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#3  0xb66057b3 in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#4  0xb653bd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#5  0xb5d1d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 6 (Thread 0xb26e3b70 (LWP 4508)):
#0  0xb7fdf424 in __kernel_vsyscall ()
---Type <return> to continue, or q <return> to quit---
#1  0xb5d0e40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb575934b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb574a896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb574ac2a in g_main_context_iteration ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb672eada in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#6  0xb66ff1dd in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#7  0xb66ff421 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/i386-linux-gnu/libQtCore.so.4
#8  0xb660290b in QThread::exec() ()
   from /usr/lib/i386-linux-gnu/libQtCore.so.4
#9  0xb66dfe2d in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#10 0xb66057b3 in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#11 0xb653bd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0xb5d1d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xb1cffb70 (LWP 4504)):
#0  0xb7fdf424 in __kernel_vsyscall ()
---Type <return> to continue, or q <return> to quit---
#1  0xb5d0e40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb575934b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb574a896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb574af9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb31d7cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb57715f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb653bd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0xb5d1d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb3589720 (LWP 4490)):
#0  0xb7fdf424 in __kernel_vsyscall ()
#1  0xb5d0e40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb575934b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb574a896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb574ac2a in g_main_context_iteration ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb672eada in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#6  0xb6b05e3a in ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
#7  0xb66ff1dd in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag---Type <return> to continue, or q <return> to quit---
>) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#8  0xb66ff421 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/i386-linux-gnu/libQtCore.so.4
#9  0xb670419d in QCoreApplication::exec() ()
   from /usr/lib/i386-linux-gnu/libQtCore.so.4
#10 0xb6a4b8f4 in QApplication::exec() ()
   from /usr/lib/i386-linux-gnu/libQtGui.so.4
#11 0x08086add in main (argc=Cannot access memory at address 0xd
)
    at /build/buildd/kdenlive-0.8.3+git20120115.5146194b/src/main.cpp:89
(gdb) 
(gdb)