Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xae92cb90 (LWP 24309)]
composite_line_yuv (
    dest=0xaea62230 "\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200"..., src=0xab1349b0 "", width=320, 
    alpha_b=0xab1440e0 "", alpha_a=0xaead2930 "", weight=65534, luma=0x0, 
    soft=0, step=65534) at transition_composite.c:391
391			mix = calculate_mix( luma, j, soft, weight, *alpha_b ++, step );
Current language:  auto; currently c
(gdb) thread apply all bt

Thread 25 (Thread 0xabfd7b90 (LWP 24311)):
#0  0xb8034430 in __kernel_vsyscall ()
#1  0xb6618412 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb671f344 in pthread_cond_timedwait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb732827c in QWaitCondition::wait (this=0xa0e8a98, mutex=0xa0e8a94, 
    time=30000) at thread/qwaitcondition_unix.cpp:85
#4  0xb731caf6 in QThreadPoolThread::run (this=0x9eafd30)
    at concurrent/qthreadpool.cpp:140
#5  0xb732725e in QThreadPrivate::start (arg=0x9eafd30)
    at thread/qthread_unix.cpp:189
#6  0xb66144ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb671049e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 24 (Thread 0xae12bb90 (LWP 24310)):
#0  0xb8034430 in __kernel_vsyscall ()
#1  0xb66180e5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb671f2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb2a8629c in consumer_thread (arg=0x94ef640) at consumer_sdl_preview.c:385
#4  0xb66144ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb671049e in clone () from /lib/tls/i686/cmov/libc.so.6
---Type <return> to continue, or q <return> to quit---

Thread 23 (Thread 0xae92cb90 (LWP 24309)):
#0  composite_line_yuv (
    dest=0xaea62230 "\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200"..., src=0xab1349b0 "", width=320, 
    alpha_b=0xab1440e0 "", alpha_a=0xaead2930 "", weight=65534, luma=0x0, 
    soft=0, step=65534) at transition_composite.c:391
#1  0xb3aceeec in composite_yuv (
    p_dest=0xaea62230 "\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\---Type <return> to continue, or q <return> to quit---
020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200"..., width_dest=640, height_dest=360, 
    p_src=0xab1349b0 "", width_src=320, height_src=180, alpha_b=0xab1440e0 "", 
    alpha_a=0xaead2930 "", geometry=
      {item = {key = 0, frame = 133, distort = 0, x = 0, y = 0, w = 640, h = 360, mix = 100, f = {0, 0, 0, 0, 0}}, nw = 1280, nh = 720, sw = 640, sh = 360, halign = 0, valign = 0, x_src = 0, y_src = 0}, field=-1, p_luma=0x0, softness=0, 
    line_fn=0xb3ad12d0 <composite_line_yuv>) at transition_composite.c:571
#2  0xb3ad001f in transition_get_image (a_frame=0xad8407c8, image=0xae92b880, 
    format=0xae92b684, width=0xae92b87c, height=0xae92b878, writable=1)
    at transition_composite.c:1285
#3  0xb801a33e in mlt_frame_get_image (this=0xad8407c8, buffer=0xae92b880, 
    format=0xae92b684, width=0xae92b87c, height=0xae92b878, writable=1)
    at mlt_frame.c:276
#4  0xb3acf544 in transition_get_image (a_frame=0xad8407c8, image=0xab1440e0, 
    format=0xae92b684, width=0xae92b87c, height=0xae92b878, writable=1)
    at transition_composite.c:1181
#5  0xb801a33e in mlt_frame_get_image (this=0xad8407c8, buffer=0xae92b880, 
    format=0xae92b684, width=0xae92b87c, height=0xae92b878, writable=1)
    at mlt_frame.c:276
---Type <return> to continue, or q <return> to quit---
#6  0xb802bc7e in producer_get_image (this=0xad81ad88, buffer=0xae92b880, 
    format=0xae92b684, width=0xae92b87c, height=0xae92b878, writable=1)
    at mlt_tractor.c:274
#7  0xb801a33e in mlt_frame_get_image (this=0xad81ad88, buffer=0xae92b880, 
    format=0xae92b684, width=0xae92b87c, height=0xae92b878, writable=1)
    at mlt_frame.c:276
#8  0xb3acdc43 in get_b_frame_image (this=0x9d68f78, b_frame=0xad81ad88, 
    image=0xae92b880, width=0xae92b87c, height=0xae92b878, geometry=0xae92b80c)
    at transition_composite.c:860
#9  0xb3acf6a0 in transition_get_image (a_frame=0xad821918, image=0xae92c34c, 
    format=0xae92c358, width=0xae92c350, height=0xae92c354, writable=1)
    at transition_composite.c:1211
#10 0xb801a33e in mlt_frame_get_image (this=0xad821918, buffer=0xae92c34c, 
    format=0xae92c358, width=0xae92c350, height=0xae92c354, writable=1)
    at mlt_frame.c:276
#11 0xb3acf544 in transition_get_image (a_frame=0xad821918, image=0xab1440e0, 
    format=0xae92c358, width=0xae92c350, height=0xae92c354, writable=0)
    at transition_composite.c:1181
#12 0xb801a33e in mlt_frame_get_image (this=0xad821918, buffer=0xae92c34c, 
    format=0xae92c358, width=0xae92c350, height=0xae92c354, writable=0)
    at mlt_frame.c:276
#13 0xb802bc7e in producer_get_image (this=0xad818f00, buffer=0xae92c34c, 
    format=0xae92c358, width=0xae92c350, height=0xae92c354, writable=0)
---Type <return> to continue, or q <return> to quit---
    at mlt_tractor.c:274
#14 0xb801a33e in mlt_frame_get_image (this=0xad818f00, buffer=0xae92c34c, 
    format=0xae92c358, width=0xae92c350, height=0xae92c354, writable=0)
    at mlt_frame.c:276
#15 0xb2a86f77 in consumer_thread (arg=0x94fe360) at consumer_sdl_still.c:466
#16 0xb66144ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#17 0xb671049e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5c7d920 (LWP 24284)):
#0  0xb8034430 in __kernel_vsyscall ()
#1  0xb6705ae7 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb5ff474b in IA__g_poll (fds=0x9fb7798, nfds=15, timeout=882)
    at /build/buildd/glib2.0-2.20.1/glib/gpoll.c:127
#3  0xb5fe6f82 in g_main_context_iterate (context=0x8fcc490, block=1, 
    dispatch=1, self=0x8fca218)
    at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2761
#4  0xb5fe7268 in IA__g_main_context_iteration (context=0x8fcc490, may_block=1)
    at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#5  0xb7446ec8 in QEventDispatcherGlib::processEvents (this=0x8fb7f90, flags=
      {i = -1074399432}) at kernel/qeventdispatcher_glib.cpp:324
#6  0xb6a76765 in QGuiEventDispatcherGlib::processEvents (this=0x8fb7f90, 
    flags={i = -1074399384}) at kernel/qguieventdispatcher_glib.cpp:202
#7  0xb7419aca in QEventLoop::processEvents (this=0xbff5f7e0, flags=
---Type <return> to continue, or q <return> to quit---
      {i = -1074399320}) at kernel/qeventloop.cpp:149
#8  0xb7419f0a in QEventLoop::exec (this=0xbff5f7e0, flags={i = -1074399256})
    at kernel/qeventloop.cpp:200
#9  0xb741c3b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#10 0xb69d4a47 in QApplication::exec () at kernel/qapplication.cpp:3526
#11 0x08080655 in main (argc=1, argv=0xbff5fa24)
    at /home/tidris/private/Documents/Projects-Software/linux-kdenlive/kdenlive/src/main.cpp:86
391			mix = calculate_mix( luma, j, soft, weight, *alpha_b ++, step );
(gdb)