Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xaaef8b90 (LWP 10431)]
composite_line_yuv (
    dest=0xa4c0e076 "QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�"..., 
    src=0xa27a2e00 '�' <repeats 200 times>..., width=341, 
    alpha_b=0x9bfaf40 "", alpha_a=0xa4cfd853 '�' <repeats 200 times>..., 
    weight=65534, luma=0x0, soft=0, step=65534) at transition_composite.c:391
391			mix = calculate_mix( luma, j, soft, weight, *alpha_b ++, step );
(gdb) thread apply all bt

Thread 28 (Thread 0xa47ffb90 (LWP 10434)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb66577b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb5dbfca7 in ?? () from /usr/lib/libxcb.so.1
#3  0xb5dc1a12 in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#4  0xb6371cae in _XReply () from /usr/lib/libX11.so.6
#5  0xb634f8e6 in _XGetWindowAttributes () from /usr/lib/libX11.so.6
#6  0xb634fa62 in XGetWindowAttributes () from /usr/lib/libX11.so.6
#7  0xb26e38a4 in consumer_get_dimensions (width=0x992c0e0, height=0x8edc450)
    at consumer_sdl.c:815
#8  0xb26e3f2c in video_thread (arg=0x8ed22b8) at consumer_sdl.c:450
#9  0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#10 0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 27 (Thread 0xa5bf2b90 (LWP 10433)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb6654ae7 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb3976f4d in ?? () from /usr/lib/libasound.so.2
#3  0xb39770c4 in snd_pcm_wait () from /usr/lib/libasound.so.2
#4  0xb39772a5 in ?? () from /usr/lib/libasound.so.2
#5  0xb39bbbe5 in ?? () from /usr/lib/libasound.so.2
#6  0xb3971b34 in snd_pcm_writei () from /usr/lib/libasound.so.2
---Type <return> to continue, or q <return> to quit---
#7  0xb26623c6 in ?? () from /usr/lib/libSDL-1.2.so.0
#8  0xb262fa05 in ?? () from /usr/lib/libSDL-1.2.so.0
#9  0xb263782b in ?? () from /usr/lib/libSDL-1.2.so.0
#10 0xb26897bd in ?? () from /usr/lib/libSDL-1.2.so.0
#11 0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 26 (Thread 0xa66f6b90 (LWP 10432)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb6654ae7 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb2e19912 in ?? () from /usr/lib/libpulse.so.0
#3  0xb2e093c0 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb2e0ad43 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb2e0ae14 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb2e196c3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb2e43ef2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 25 (Thread 0xaaef8b90 (LWP 10431)):
#0  composite_line_yuv (
    dest=0xa4c0e076 "QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ---Type <return> to continue, or q <return> to quit---
�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�"..., 
    src=0xa27a2e00 '�' <repeats 200 times>..., width=341, 
    alpha_b=0x9bfaf40 "", alpha_a=0xa4cfd853 '�' <repeats 200 times>..., 
    weight=65534, luma=0x0, soft=0, step=65534) at transition_composite.c:391
#1  0xb2837eec in composite_yuv (
    p_dest=0xa4c0e076 "QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�QZQ�"..., 
    width_dest=683, height_dest=384, 
    p_src=0xa27a2e00 '�' <repeats 200 times>..., width_src=341, 
    height_src=192, alpha_b=0x9bfaf40 "", 
    alpha_a=0xa4cfd853 '�' <repeats 200 times>..., geometry=
      {item = {key = 0, frame = 79, 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=0xb283a2d0 <composite_line_yuv>) at transition_composite.c:571
#2  0xb283901f in transition_get_image (a_frame=0xa0ba55e0, image=0xaaef7eb0, 
    format=0xaaef7cb4, width=0xaaef7eac, height=0xaaef7ea8, writable=1)
    at transition_composite.c:1285
#3  0xb7f6933e in mlt_frame_get_image (this=0xa0ba55e0, buffer=0xaaef7eb0, 
    format=0xaaef7cb4, width=0xaaef7eac, height=0xaaef7ea8, writable=1)
    at mlt_frame.c:276
#4  0xb2836c43 in get_b_frame_image (this=0x9936678, b_frame=0xa0ba55e0, 
---Type <return> to continue, or q <return> to quit---
    image=0xaaef7eb0, width=0xaaef7eac, height=0xaaef7ea8, geometry=0xaaef7e3c)
    at transition_composite.c:860
#5  0xb28386a0 in transition_get_image (a_frame=0xad6a24b8, image=0xaaef8348, 
    format=0x8ed22fc, width=0xaaef8364, height=0xaaef8360, writable=0)
    at transition_composite.c:1211
#6  0xb7f6933e in mlt_frame_get_image (this=0xad6a24b8, buffer=0xaaef8348, 
    format=0x8ed22fc, width=0xaaef8364, height=0xaaef8360, writable=0)
    at mlt_frame.c:276
#7  0xb7f7ac7e in producer_get_image (this=0xad603300, buffer=0xaaef8348, 
    format=0x8ed22fc, width=0xaaef8364, height=0xaaef8360, writable=0)
    at mlt_tractor.c:274
#8  0xb7f6933e in mlt_frame_get_image (this=0xad603300, buffer=0xaaef8348, 
    format=0x8ed22fc, width=0xaaef8364, height=0xaaef8360, writable=0)
    at mlt_frame.c:276
#9  0xb7f780ed in consumer_read_ahead_thread (arg=0x8ed22b8)
    at mlt_consumer.c:701
#10 0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#11 0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 24 (Thread 0xadf8eb90 (LWP 10430)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb65670e5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#2  0xb666e2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb26e4dc8 in consumer_thread (arg=0x8ed22b8) at consumer_sdl.c:401
#4  0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 22 (Thread 0xab6f9b90 (LWP 10420)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb66577b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb73480c0 in QProcessManager::run (this=0x89af370)
    at io/qprocess_unix.cpp:305
#3  0xb727625e in QThreadPrivate::start (arg=0x89af370)
    at thread/qthread_unix.cpp:189
#4  0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 21 (Thread 0xae78fb90 (LWP 10419)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb6569cf9 in __lll_lock_wait () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb6565129 in _L_lock_89 () from /lib/tls/i686/cmov/libpthread.so.0
#3  0xb6564a32 in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
#4  0xb666e4b6 in pthread_mutex_lock () from /lib/tls/i686/cmov/libc.so.6
#5  0xb7f71425 in mlt_service_lock (this=0x9925dd0) at mlt_service.c:137
#6  0xb7f7145e in mlt_service_get_frame (this=0x9925dd0, frame=0xae78f308, 
---Type <return> to continue, or q <return> to quit---
    index=0) at mlt_service.c:444
#7  0xb7f715dd in service_get_frame (this=0x80, frame=0xae78f308, index=0)
    at mlt_service.c:372
#8  0xb7f714be in mlt_service_get_frame (this=0x8ed0350, frame=0xae78f308, 
    index=0) at mlt_service.c:456
#9  0xb7f774c6 in mlt_consumer_get_frame (this=0x8ed0350) at mlt_consumer.c:509
#10 0xb26e6d24 in consumer_thread (arg=0x8ed0350) at consumer_sdl_preview.c:288
#11 0xb65634ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0xb665f49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5bcc920 (LWP 10136)):
#0  0xb7f83430 in __kernel_vsyscall ()
#1  0xb6654ae7 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb5f4374b in IA__g_poll (fds=0x97178e0, nfds=14, timeout=16241)
    at /build/buildd/glib2.0-2.20.1/glib/gpoll.c:127
#3  0xb5f35f82 in g_main_context_iterate (context=0x89ae490, block=1, 
    dispatch=1, self=0x89ac218)
    at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2761
#4  0xb5f36268 in IA__g_main_context_iteration (context=0x89ae490, may_block=1)
    at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#5  0xb7395ec8 in QEventDispatcherGlib::processEvents (this=0x8999f90, flags=
      {i = -1079999448}) at kernel/qeventdispatcher_glib.cpp:324
#6  0xb69c5765 in QGuiEventDispatcherGlib::processEvents (this=0x8999f90, 
---Type <return> to continue, or q <return> to quit---
    flags={i = -1079999400}) at kernel/qguieventdispatcher_glib.cpp:202
#7  0xb7368aca in QEventLoop::processEvents (this=0xbfa084d0, flags=
      {i = -1079999336}) at kernel/qeventloop.cpp:149
#8  0xb7368f0a in QEventLoop::exec (this=0xbfa084d0, flags={i = -1079999272})
    at kernel/qeventloop.cpp:200
#9  0xb736b3b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#10 0xb6923a47 in QApplication::exec () at kernel/qapplication.cpp:3526
#11 0x080806a5 in main (argc=1, argv=0xbfa08714)
    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)