Bug 404173

Summary:	Preview with GPU acceleration
Product:	[Applications] kdenlive	Reporter:	Alcolo47 <Alcolo47>
Component:	User Interface & Miscellaneous	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	CONFIRMED ---
Severity:	wishlist	CC:	agurenko, fritzibaby, kate
Priority:	NOR	Keywords:	triaged
Version First Reported In:	unspecified	Flags:	fritzibaby: Brainstorm+ fritzibaby: MOVIT+
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	project with bug

Description Alcolo47 2019-02-10 11:27:16 UTC

Application: kdenlive (19.03.70)

Qt Version: 5.11.1
Frameworks Version: 5.50.0
Operating System: Linux 4.18.0-13-generic x86_64
Distribution: Ubuntu 18.10

-- Information about the crash:
- What I was doing when the application crashed:
I open kdenlive from a saved project
I select a point in the time bar, 
I launh play (with space)

In the bugged zone some editions was made (but removed):
I made transitions:
- 2 clips separated with ~5seconds in the same time line
- I added a title clip in an upper time line. This clip overlap the 2 first clips pn few seconds
- I added two "composite" transitions

Since those editions, I had more and more crashes, then I tried by removing those transitions and title. Crashes are not gone.

I tried to re-encode clip sources with ffmeg. No change.

The crash can be reproduced every time.

-- Backtrace:
Application: Kdenlive (kdenlive), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
__GI___libc_read (fd=6, buf=0x7ffd0d5ffa38, nbytes=56) at ../sysdeps/unix/sysv/linux/read.c:26
[Current thread is 1 (Thread 0x7f4ead189940 (LWP 11891))]

Thread 25 (Thread 0x7f4e1a7fc700 (LWP 11929)):
#0  0x00007f4eb81c36a0 in __GI___nanosleep (requested_time=0x7f4e1a7fbc20, remaining=0x7f4e1a7fbc10) at ../sysdeps/unix/sysv/linux/nanosleep.c:28
#1  0x00007f4ea0df3af5 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#2  0x00007f4ea0d327d3 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#3  0x00007f4ea0d795ec in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#4  0x00007f4ea0deef89 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#5  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f4e1affd700 (LWP 11924)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e393bd9c0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e393bda28, cond=0x7f4e393bd998) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e393bd998, mutex=0x7f4e393bda28) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f4e1b7fe700 (LWP 11923)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e393bd810) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e393bd878, cond=0x7f4e393bd7e8) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e393bd7e8, mutex=0x7f4e393bd878) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f4e1bfff700 (LWP 11922)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e393bd660) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e393bd6c8, cond=0x7f4e393bd638) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e393bd638, mutex=0x7f4e393bd6c8) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f4e44a1c700 (LWP 11921)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e393bd4b0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e393bd518, cond=0x7f4e393bd488) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e393bd488, mutex=0x7f4e393bd518) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f4e4521d700 (LWP 11920)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e393bd300) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e393bd368, cond=0x7f4e393bd2d8) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e393bd2d8, mutex=0x7f4e393bd368) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f4e4601e700 (LWP 11919)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5626f9409354) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x5626f9409300, cond=0x5626f9409328) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x5626f9409328, mutex=0x5626f9409300) at pthread_cond_wait.c:655
#3  0x00007f4ea800e98d in  () at /usr/lib/x86_64-linux-gnu/mlt/libmltsdl2.so
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f4e4681f700 (LWP 11918)):
#0  0x00007f4eaf52a7aa in pa_srbchannel_read () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#1  0x00007f4eaf526d20 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#2  0x00007f4eaf529a7b in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#3  0x00007f4eaf529e19 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#4  0x00007f4eaf52a66a in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#5  0x00007f4eb2ca8568 in pa_mainloop_dispatch () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f4eb2ca883c in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f4ea0dd2d17 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#8  0x00007f4ea0d32836 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#9  0x00007f4ea0d795ec in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#10 0x00007f4ea0deef89 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#11 0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f4e5c895700 (LWP 11917)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e38074004) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e38074068, cond=0x7f4e38073fd8) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e38073fd8, mutex=0x7f4e38074068) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f4e5d096700 (LWP 11916)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e38073e54) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e38073eb8, cond=0x7f4e38073e28) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e38073e28, mutex=0x7f4e38073eb8) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f4e5d897700 (LWP 11915)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e38073ca0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e38073d08, cond=0x7f4e38073c78) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e38073c78, mutex=0x7f4e38073d08) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f4e5e098700 (LWP 11914)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e38073af0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e38073b58, cond=0x7f4e38073ac8) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e38073ac8, mutex=0x7f4e38073b58) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f4e5fdfb700 (LWP 11913)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4e38073940) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4e380739a8, cond=0x7f4e38073918) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4e38073918, mutex=0x7f4e380739a8) at pthread_cond_wait.c:655
#3  0x00007f4e9b0bd55e in  () at /usr/lib/x86_64-linux-gnu/libavcodec.so.58
#4  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#5  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f4e5e8f9700 (LWP 11912)):
[KCrash Handler]
#6  0x00007f4ea0ac1364 in MltInput::set_pixel_data(unsigned char const*) () at /usr/lib/x86_64-linux-gnu/mlt/libmltopengl.so
#7  0x00007f4ea0abae68 in  () at /usr/lib/x86_64-linux-gnu/mlt/libmltopengl.so
#8  0x00007f4ea0aba859 in  () at /usr/lib/x86_64-linux-gnu/mlt/libmltopengl.so
#9  0x00007f4ea0abb640 in  () at /usr/lib/x86_64-linux-gnu/mlt/libmltopengl.so
#10 0x00007f4ebacaaf3e in mlt_frame_get_image () at /usr/lib/x86_64-linux-gnu/libmlt.so.6
#11 0x00007f4ebacc0879 in  () at /usr/lib/x86_64-linux-gnu/libmlt.so.6
#12 0x00007f4ebacaaedf in mlt_frame_get_image () at /usr/lib/x86_64-linux-gnu/libmlt.so.6
#13 0x00007f4ebacbdd7f in  () at /usr/lib/x86_64-linux-gnu/libmlt.so.6
#14 0x00005626f536f11d in  ()
#15 0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#17 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f4e5f5fa700 (LWP 11911)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5626f8b13c6c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x5626f8b13c18, cond=0x5626f8b13c40) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x5626f8b13c40, mutex=0x5626f8b13c18) at pthread_cond_wait.c:655
#3  0x00007f4ebacbe0e3 in mlt_consumer_rt_frame () at /usr/lib/x86_64-linux-gnu/libmlt.so.6
#4  0x00007f4ea800ede3 in  () at /usr/lib/x86_64-linux-gnu/mlt/libmltsdl2.so
#5  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f4e7c0e7700 (LWP 11910)):
#0  0x00007f4eb81f37d6 in __GI_ppoll (fds=0x5626f9d63810, nfds=3, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f4eb2ca8261 in pa_mainloop_poll () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f4eb2ca882e in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f4eb2ca88e0 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f4ea0dd2eef in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#5  0x00007f4ea0d795ec in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#6  0x00007f4ea0deef89 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#7  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f4e7dae2700 (LWP 11903)):
#0  0x00007f4eb81eef64 in __GI___libc_read (fd=20, buf=0x7f4e7dae1a40, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f4eb2d88180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eb2d4291f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eb2d42df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4eb2d42f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4eb88a315b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4eb885016b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4eb869f0b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f4e7e2e3700 (LWP 11902)):
#0  0x00007f4eb81eef64 in __GI___libc_read (fd=19, buf=0x7f4e7e2e2a40, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f4eb2d88180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eb2d4291f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eb2d42df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4eb2d42f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4eb88a315b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4eb885016b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4eb869f0b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f4e7ffff700 (LWP 11899)):
#0  0x00007f4eb2d89509 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eb2d41e50 in g_main_context_acquire () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eb2d42d05 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eb2d42f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4eb88a315b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4eb885016b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4eb869f0b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4eb950a1f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f4e8e3a1700 (LWP 11897)):
#0  0x00007f4eb81eef64 in __GI___libc_read (fd=14, buf=0x7f4e8e3a0a20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f4eb2d88180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eb2d4291f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eb2d42df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4eb2d42f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4eb88a315b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4eb885016b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4eb869f0b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4eb950a1f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f4e8eba2700 (LWP 11895)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5626f73ebac8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x5626f73eba78, cond=0x5626f73ebaa0) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x5626f73ebaa0, mutex=0x5626f73eba78) at pthread_cond_wait.c:655
#3  0x00007f4e8f29546b in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f4e8f2951d7 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f4ea9a63700 (LWP 11894)):
#0  0x00007f4eb81eef64 in __GI___libc_read (fd=7, buf=0x7f4ea9a62a10, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f4eb2d88180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eb2d4291f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eb2d42df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4eb2d42f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4eb88a315b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4eb885016b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4eb869f0b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4eba29b545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f4eaaa3c700 (LWP 11893)):
#0  0x00007f4eb81f36d9 in __GI___poll (fds=0x7f4eaaa3bb78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4eb2c5e917 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4eb2c6053a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4eabce6159 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f4eb86a8c87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f4ead185700 (LWP 11892)):
#0  0x00007f4eb79482eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4eb7481090) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4eb79482eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x5626f701fe00, cond=0x7f4eb7481068) at pthread_cond_wait.c:502
#2  0x00007f4eb79482eb in __pthread_cond_wait (cond=0x7f4eb7481068, mutex=0x5626f701fe00) at pthread_cond_wait.c:655
#3  0x00007f4eb851383c in std::condition_variable::wait(std::unique_lock<std::mutex>&) () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007f4eb69af832 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#5  0x00007f4eb69af949 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#6  0x00007f4eb851963f in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7  0x00007f4eb7942164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f4eb81ffdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f4ead189940 (LWP 11891)):
#0  0x00007f4eb81eef64 in __GI___libc_read (fd=6, buf=0x7ffd0d5ffa38, nbytes=56) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f4eab674b88 in  () at /usr/lib/x86_64-linux-gnu/libICE.so.6
#2  0x00007f4eab679388 in _IceRead () at /usr/lib/x86_64-linux-gnu/libICE.so.6
#3  0x00007f4eab6794dc in _IceReadSkip () at /usr/lib/x86_64-linux-gnu/libICE.so.6
#4  0x00007f4eab88c308 in _SmcProcessMessage () at /usr/lib/x86_64-linux-gnu/libSM.so.6
#5  0x00007f4eab67d978 in IceProcessMessages () at /usr/lib/x86_64-linux-gnu/libICE.so.6
#6  0x00007f4eb887a6db in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4eb8885f19 in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4eb8886261 in QSocketNotifier::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4eb9c3f4a1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f4eb9c46ae0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f4eb8851499 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f4eb88a3d6a in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f4eb2d42c3e in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f4eb2d42ed8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007f4eb2d42f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f4eb88a3143 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f4eabd77e51 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x00007f4eb885016b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f4eb88582e2 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00005626f50d3de3 in  ()
#21 0x00007f4eb810909b in __libc_start_main (main=0x5626f50d2c60, argc=2, argv=0x7ffd0d6005b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd0d6005a8) at ../csu/libc-start.c:308
#22 0x00005626f50d463a in _start ()
[Inferior 1 (process 11891) detached]

Reported using DrKonqi

Comment 1 Alcolo47 2019-02-10 11:33:31 UTC

Version 19.03.70 from ppa:kdenlive/kdenlive-master

Comment 2 emohr 2019-02-11 18:37:53 UTC

19.03.70 is the refactoring branch.
Do you use GPU acceleration? If yes please switch off as it is not stable.

Comment 3 Alcolo47 2019-02-18 20:59:59 UTC

Created attachment 118189 [details]
project with bug

I have changed sources files with smaller one. The crash seems identical.
mpeg files were generated with ffmpeg -f lavfi -i color=c=red:s=640x480 -t 1 red.mp4

Tested on commit d884e9477c11f45cb74057ee4c9d50bc5f3b93b8 (v18.08.3)

Comment 4 Alcolo47 2019-02-18 21:09:17 UTC

(In reply to emohr from comment #2)
> 19.03.70 is the refactoring branch.
> Do you use GPU acceleration? If yes please switch off as it is not stable.


Without GPU, preview and rendering work fine.

Comment 5 emohr 2021-03-06 10:15:23 UTC

Thank you for the feedback and contribution. Glad to hear it works without GPU. 

GPU for preview will come but depends on the MLT framework on which Kdenlive relay on.

I change it to wishlist and update the title.

Comment 6 emohr 2021-03-06 10:32:42 UTC

*** Bug 423115 has been marked as a duplicate of this bug. ***