Horrible banding when applying a LUT

[evertvorster]

Hi there!

I first wanted to complain to the kdenlive crowd, but a little troubleshooting led me here.
When I apply the LUT effect in kdenlive with the latest git version of mlt installed, I get horrible banding, almost as if "nearest" interpolation method was selected. Changing the interpolation method also does not seem to have any effect.

When I changed the installed version of mlt back to the previous one I had used, the banding issues disappeared.

So, the version I built on October 10 from git does not have the banding issue:
mlt-git-r5692.1633467919.d375935f-1-x86_64.pkg.tar.xz

Whereas the version I built from git yesterday (29 November 2021) does have the banding issue.
mlt-git-r5720.1637802987.35d58446-1-x86_64.pkg.tar.xz

Many thanks for building such a great bit of software, it seems a shame that we only communicate when there is an issue.
;)

[ddennedy]

"LUT effect in kdenlive" needs to be converted into MLT terms unless you just want a kdenlive developer to look into it. Basically without melt command line or MLT XML, this bug report is invalid. Sorry

[ddennedy]

Re "it seems a shame that we only communicate when there is an issue."

It nice to hear from you again, Evert. You have been around here a while. Please understand that I have not worked on Kdenlive for years. Also, I am very busy with full time software engineering job and open source projects. So, I tend to do all my socializing (what little there is) away from a computer. :-)

[evertvorster]

How would I go about applying a LUT with just MLT?

Honestly, I don't see how that matters, as with the older version of MLT installed, there is no banding when rendering the project, and with the latest version of MLT installed there is horrible banding for exactly the same project.

Surely there is only one way that a LUT can be applied, and kdenlive is using it?

[ddennedy]

I believe I reproduced the problem when using the avfilter.lut3d filter. There was a major change to avfilter between the dates you supplied. As for how, in the future, you can look for lines with "mlt_service" in the XML.

[evertvorster]

Thank you so much for this very quick fix! Remember to also stop and smell the roses. Ie: don't get too busy to enjoy life. :)

[evertvorster]

Hi there...
OK, so it's not quite fixed, as it is producing a segfault now:

---------------snip------------------
t: Session management error: networkIdsList argument is NULL

Thread 1 "kdenlive" received signal SIGSEGV, Segmentation fault.
0x00007fff7c50b54c in av_opt_find2 () from /usr/lib/libavutil.so.56
(gdb) thread apply all bt

Thread 131 (Thread 0x7ffe417fa640 (LWP 1869) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff29c47296 in () at /usr/lib/mlt-7/libmltsdl2.so
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 122 (Thread 0x7ffef77fe640 (LWP 1860) "SDLAudioP2"):
#0 0x00007ffff4bb8c2e in ppoll () at /usr/lib/libc.so.6
#1 0x00007ffff3f80543 in pa_mainloop_poll () at /usr/lib/libpulse.so.0
#2 0x00007ffff3f8a709 in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#3 0x00007fff2a547f87 in () at /usr/lib/libSDL2-2.0.so.0
#4 0x00007fff2a48bbb6 in () at /usr/lib/libSDL2-2.0.so.0
#5 0x00007fff2a4e0443 in () at /usr/lib/libSDL2-2.0.so.0
#6 0x00007fff2a5852ba in () at /usr/lib/libSDL2-2.0.so.0
#7 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 121 (Thread 0x7ffe8dffb640 (LWP 1859) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bb19fa in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
--Type for more, q to quit, c to continue without paging--
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 120 (Thread 0x7ffe9b230640 (LWP 1858) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff29c46fc8 in () at /usr/lib/mlt-7/libmltsdl2.so
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 119 (Thread 0x7fff10350640 (LWP 1857) "PulseHotplug"):
#0 0x00007ffff4bb8c2e in ppoll () at /usr/lib/libc.so.6
#1 0x00007ffff3f80543 in pa_mainloop_poll () at /usr/lib/libpulse.so.0
#2 0x00007ffff3f8a709 in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#3 0x00007ffff3f8a7c1 in pa_mainloop_run () at /usr/lib/libpulse.so.0
#4 0x00007fff2a548290 in () at /usr/lib/libSDL2-2.0.so.0
#5 0x00007fff2a4e0443 in () at /usr/lib/libSDL2-2.0.so.0
#6 0x00007fff2a5852ba in () at /usr/lib/libSDL2-2.0.so.0
#7 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 118 (Thread 0x7ffe8cc31640 (LWP 1856) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 117 (Thread 0x7ffe98a2b640 (LWP 1855) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 116 (Thread 0x7ffe9922c640 (LWP 1854) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6
--Type for more, q to quit, c to continue without paging--

Thread 115 (Thread 0x7ffe99a2d640 (LWP 1853) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 114 (Thread 0x7ffe9a22e640 (LWP 1852) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 113 (Thread 0x7ffe9aa2f640 (LWP 1851) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 112 (Thread 0x7ffe8ffff640 (LWP 1850) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 111 (Thread 0x7ffe8f7fe640 (LWP 1849) "QQuickPixmapRea"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 110 (Thread 0x7ffe8effd640 (LWP 1848) "QQuickPixmapRea"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
--Type for more, q to quit, c to continue without paging--
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff6e6ae7b in () at /usr/lib/libQt5Quick.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 107 (Thread 0x7ffeccff9640 (LWP 1845) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 106 (Thread 0x7ffecd7fa640 (LWP 1844) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 105 (Thread 0x7ffecdffb640 (LWP 1843) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 104 (Thread 0x7ffece7fc640 (LWP 1842) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 103 (Thread 0x7ffeceffd640 (LWP 1841) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
--Type for more, q to quit, c to continue without paging--
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 102 (Thread 0x7ffecf7fe640 (LWP 1840) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 101 (Thread 0x7ffecffff640 (LWP 1839) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 100 (Thread 0x7ffeb4894640 (LWP 1838) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff6bcc694 in () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 96 (Thread 0x7ffe8d432640 (LWP 1834) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 95 (Thread 0x7ffed6ffd640 (LWP 1833) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 94 (Thread 0x7ffed77fe640 (LWP 1832) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
--Type for more, q to quit, c to continue without paging--
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 93 (Thread 0x7ffed7fff640 (LWP 1831) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 92 (Thread 0x7ffed67fc640 (LWP 1830) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 91 (Thread 0x7ffed5ffb640 (LWP 1829) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 90 (Thread 0x7ffed57fa640 (LWP 1828) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 89 (Thread 0x7ffed4ff9640 (LWP 1827) "kdenlive"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fff7c52263c in () at /usr/lib/libavutil.so.56
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

--Type for more, q to quit, c to continue without paging--
Thread 79 (Thread 0x7ffef6ffd640 (LWP 1817) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 48 (Thread 0x7ffeb5848640 (LWP 1768) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 47 (Thread 0x7ffeb67fc640 (LWP 1767) "FrameRenderer"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#7 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 46 (Thread 0x7ffeb6ffd640 (LWP 1766) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 45 (Thread 0x7ffeb77fe640 (LWP 1765) "QSGRenderThread"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c107c in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
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#3 0x00007ffff6f22f37 in () at /usr/lib/libQt5Quick.so.5
#4 0x00007ffff6f2548b in () at /usr/lib/libQt5Quick.so.5
#5 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#7 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 44 (Thread 0x7ffeb7fff640 (LWP 1764) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 43 (Thread 0x7ffef4ff9640 (LWP 1763) "FrameRenderer"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#7 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 42 (Thread 0x7ffef57fa640 (LWP 1762) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 41 (Thread 0x7ffef5ffb640 (LWP 1761) "QSGRenderThread"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c107c in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff6f22f37 in () at /usr/lib/libQt5Quick.so.5
#4 0x00007ffff6f2548b in () at /usr/lib/libQt5Quick.so.5
#5 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
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#6 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#7 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 40 (Thread 0x7ffef67fc640 (LWP 1760) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 36 (Thread 0x7ffef7fff640 (LWP 1756) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 35 (Thread 0x7fff11054640 (LWP 1755) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 34 (Thread 0x7fff11858640 (LWP 1754) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 33 (Thread 0x7fff120dc640 (LWP 1753) "QQuickPixmapRea"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
--Type for more, q to quit, c to continue without paging--
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff6e6ae7b in () at /usr/lib/libQt5Quick.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 32 (Thread 0x7fff13380640 (LWP 1752) "QQmlThread"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff5a15509 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 31 (Thread 0x7fff13bff640 (LWP 1751) "QQuickPixmapRea"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff6e6ae7b in () at /usr/lib/libQt5Quick.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 30 (Thread 0x7fff20ee8640 (LWP 1750) "QQmlThread"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff5a15509 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
--Type for more, q to quit, c to continue without paging--
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 29 (Thread 0x7fff219e9640 (LWP 1743) "kdenlive"):
#0 0x00007ffff4bbb323 in pselect () at /usr/lib/libc.so.6
#1 0x00007ffff2c49524 in () at /usr/lib/libusbmuxd-2.0.so.6
#2 0x00007ffff2c4a8a9 in () at /usr/lib/libusbmuxd-2.0.so.6
#3 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 28 (Thread 0x7fff22c2a640 (LWP 1742) "QQmlThread"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff5a15509 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 27 (Thread 0x7fff23eae640 (LWP 1741) "QQmlThread"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff5a15509 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 26 (Thread 0x7fff29b76640 (LWP 1740) "QQmlThread"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
--Type for more, q to quit, c to continue without paging--
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff5a15509 in () at /usr/lib/libQt5Qml.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 24 (Thread 0x7fff92ffd640 (LWP 1715) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 23 (Thread 0x7fff937fe640 (LWP 1714) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 22 (Thread 0x7fff93fff640 (LWP 1713) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 21 (Thread 0x7fffc0ff9640 (LWP 1712) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
--Type for more, q to quit, c to continue without paging--
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 20 (Thread 0x7fffc17fa640 (LWP 1711) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 19 (Thread 0x7fffc1ffb640 (LWP 1710) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 18 (Thread 0x7fffc27fc640 (LWP 1709) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 17 (Thread 0x7fffc2ffd640 (LWP 1708) "Thread (pooled)"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a574 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007ffff50c1000 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#3 0x00007ffff50be4a8 in () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7fffc37fe640 (LWP 1707) "QDBusConnection"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
--Type for more, q to quit, c to continue without paging--
#1 0x00007ffff325f6d9 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#5 0x00007ffff50b9e12 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6 0x00007ffff696bae8 in () at /usr/lib/libQt5DBus.so.5
#7 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
#8 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#9 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7fffc8ff9640 (LWP 1706) "kdenlive:gdrv0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7fffc97fa640 (LWP 1705) "kdenlive:shlo3"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7fffc9ffb640 (LWP 1704) "kdenlive:shlo2"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7fffca7fc640 (LWP 1703) "kdenlive:shlo1"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
--Type for more, q to quit, c to continue without paging--
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7fffcaffd640 (LWP 1702) "kdenlive:shlo0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7fffcb7fe640 (LWP 1701) "kdenlive:sh5"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fffc3fff640 (LWP 1700) "kdenlive:sh4"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fffcbfff640 (LWP 1699) "kdenlive:sh3"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffe0d52640 (LWP 1698) "kdenlive:sh2"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
--Type for more, q to quit, c to continue without paging--
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fffe1553640 (LWP 1697) "kdenlive:sh1"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fffe1d54640 (LWP 1696) "kdenlive:sh0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fffecf63640 (LWP 1695) "kdenliv:disk$0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fffed8b9640 (LWP 1694) "kdenlive:cs0"):
#0 0x00007ffff3f508ca in __futex_abstimed_wait_common64 () at /usr/lib/libpthread.so.0
#1 0x00007ffff3f4a270 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#2 0x00007fffedd4a97c in () at /usr/lib/dri/radeonsi_dri.so
#3 0x00007fffedd44058 in () at /usr/lib/dri/radeonsi_dri.so
#4 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7ffff0123640 (LWP 1693) "QXcbEventQueue"):
#0 0x00007ffff4bb8b2f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff316963b in () at /usr/lib/libxcb.so.1
#2 0x00007ffff316b37b in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3 0x00007ffff0228f41 in () at /usr/lib/libQt5XcbQpa.so.5
#4 0x00007ffff50bafef in () at /usr/lib/libQt5Core.so.5
--Type for more, q to quit, c to continue without paging--
#5 0x00007ffff3f44259 in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007ffff4bc35e3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7ffff069af40 (LWP 1689) "kdenlive"):
#0 0x00007fff7c50b54c in av_opt_find2 () at /usr/lib/libavutil.so.56
#1 0x00007fffc806fe56 in () at /usr/lib/mlt-7/libmltavformat.so
#2 0x00007ffff6bb40ba in mlt_events_fire () at /usr/lib/libmlt-7.so.7
#3 0x00007ffff6bc375a in () at /usr/lib/libmlt-7.so.7
#4 0x00005555556bf338 in ()
#5 0x00005555556c0dbb in ()
#6 0x00005555556cb8de in ()
#7 0x00007ffff67b0856 in QUndoStack::push(QUndoCommand*) () at /usr/lib/libQt5Widgets.so.5
#8 0x0000555555b860d5 in ()
#9 0x00007ffff52dd76b in () at /usr/lib/libQt5Core.so.5
#10 0x0000555555622a2e in ()
#11 0x00005555556e11d7 in ()
#12 0x00007ffff52dd76b in () at /usr/lib/libQt5Core.so.5
#13 0x00007ffff64f34f3 in QAbstractButton::clicked(bool) () at /usr/lib/libQt5Widgets.so.5
#14 0x00007ffff64f377c in () at /usr/lib/libQt5Widgets.so.5
#15 0x00007ffff64f5384 in () at /usr/lib/libQt5Widgets.so.5
#16 0x00007ffff64f55a5 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () at /usr/lib/libQt5Widgets.so.5
#17 0x00007ffff65f352b in QToolButton::mouseReleaseEvent(QMouseEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007ffff643f0be in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#19 0x00007ffff63fbd62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#20 0x00007ffff6403ac9 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#21 0x00007ffff52a63ba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#22 0x00007ffff640257b in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool, bool) () at /usr/lib/libQt5Widgets.so.5
#23 0x00007ffff6458a84 in () at /usr/lib/libQt5Widgets.so.5
#24 0x00007ffff645bdb5 in () at /usr/lib/libQt5Widgets.so.5
#25 0x00007ffff63fbd62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#26 0x00007ffff52a63ba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#27 0x00007ffff5cff1f0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib/libQt5Gui.so.5
#28 0x00007ffff5cd47d5 in QWindowSystemInterface::sendWindowSystemEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Gui.so.5
#29 0x00007ffff0229fcc in () at /usr/lib/libQt5XcbQpa.so.5
#30 0x00007ffff320b4dc in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#31 0x00007ffff325f749 in () at /usr/lib/libglib-2.0.so.0
#32 0x00007ffff3208bc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#33 0x00007ffff52fefe6 in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
#34 0x00007ffff52a4d2c in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at /usr/lib/libQt5Core.so.5
--Type for more, q to quit, c to continue without paging--
#35 0x00007ffff52ad294 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#36 0x0000555555618aa0 in ()
#37 0x00007ffff4aecb25 in __libc_start_main () at /usr/lib/libc.so.6
#38 0x000055555561a35e in ()
(gdb)

[ddennedy]

Sorry but I am not able to figure out why the crash is occurring as I am not setup to build and debug within kdenlive. Maybe you can convince a kdenlive developer to take a look into it.

[evertvorster]

No worries, I'll take a few pokes at it. At least if you also get crashes from other users of mlt then you know a good place to start looking. :)

[frdbr]

I can help debug this further, so far I found the issue might be here:

0x00007fffae122642 in av_opt_next () from /usr/lib/libavutil.so.56

I wonder if this is an MLT issue or Kdenlive wrongly implementing LUTs in MLT7?

Thread 1 (Thread 0x7ffff0492a80 (LWP 8803) "kdenlive"):
#0  0x00007fffae122642 in av_opt_next () at /usr/lib/libavutil.so.56
#1  0x00007fffae12283c in av_opt_find2 () at /usr/lib/libavutil.so.56
#2  0x00007fffb4035e56 in property_changed (owner=<optimized out>, filter=0x5555645baba0, event_data=...) at /usr/src/debug/mlt/src/modules/avformat/filter_avfilter.c:74
        opt = <optimized out>
        pdata = 0x55556327dfc0
        name = 0x555561081288 "av.file"
#3  0x00007ffff683f0ba in mlt_events_fire (self=self@entry=0x5555645baba0, id=id@entry=0x7ffff685a50b "property-changed", event_data=...) at /usr/src/debug/mlt/src/framework/mlt_events.c:203
        event = <optimized out>
        i = 0
        list = <optimized out>
        listeners = 0x5555646967b0
        temp = "list:property-changed\000\000\000\000\361\034\354\030\305nT\030\353hdUU\000\000\370\376\377\377\377\377\377\377\021\000\000\000\000\000\000\000\270^xdUU\000\000\210\022\baUU\000\000\340\267\034aUU\000\000\220\311\377\377\377\177\000\000\350\071z\364\377\177\000\000p^xdUU\000\000\270\024\baUU\000\000i\000\000\000\000\000\000\000Osz\364\377\177\000"
        result = 0
        events = <optimized out>
#4  0x00007ffff684e88a in fire_property_changed (name=0x555561081288 "av.file", self=0x5555645baba0) at /usr/src/debug/mlt/src/framework/mlt_properties.c:619
        error = 0
        property = 0x555564785e70
#5  mlt_properties_set (self=0x5555645baba0, name=0x555561081288 "av.file", value=<optimized out>) at /usr/src/debug/mlt/src/framework/mlt_properties.c:811
        error = 0
        property = 0x555564785e70
#6  0x000055555572250a in AssetParameterModel::internalSetParameter(QString const&, QString const&, QModelIndex const&) (this=0x555561c1df28, name=..., paramValue=..., paramIndex=...) at /home/farid/kdenlive/src/assets/model/assetparametermodel.cpp:343
        conversionSuccess = false
        doubleValue = 0
#7  0x00005555557253b6 in AssetParameterModel::setParameter(QString const&, QString const&, bool, QModelIndex const&) (this=0x555561c1df28, name=..., paramValue=..., update=false, paramIndex=...) at /home/farid/kdenlive/src/assets/model/assetparametermodel.cpp:385
        updateChildRequired = 255
#8  0x0000555555738ecd in AssetCommand::redo() (this=0x555565c451b0) at /home/farid/kdenlive/src/assets/model/assetcommand.cpp:66
#9  0x00007ffff642e946 in QUndoStack::push(QUndoCommand*) () at /usr/lib/libQt5Widgets.so.5
#10 0x00005555559ccbc7 in DocUndoStack::push(QUndoCommand*) (this=0x555556c16ce0, cmd=0x555565c451b0) at /home/farid/kdenlive/src/doc/docundostack.cpp:21
#11 0x0000555555df50f3 in Core::pushUndo(QUndoCommand*) (this=0x555556c965a0, command=0x555565c451b0) at /home/farid/kdenlive/src/core.cpp:783
#12 0x000055555573bd18 in AssetParameterView::commitChanges(QModelIndex const&, QString const&, bool) (this=0x555560fa0880, index=..., value=..., storeUndo=true) at /home/farid/kdenlive/src/assets/view/assetparameterview.cpp:163
        command = 0x555565c451b0
#13 0x000055555573ff7e in QtPrivate::FunctorCall<QtPrivate::IndexesList<0, 1, 2>, QtPrivate::List<QModelIndex, QString, bool>, void, void (AssetParameterView::*)(QModelIndex const&, QString const&, bool)>::call(void (AssetParameterView::*)(QModelIndex const&, QString const&, bool), AssetParameterView*, void**) (f=(void (AssetParameterView::*)(AssetParameterView * const, const QModelIndex &, const QString &, bool)) 0x55555573bc30 <AssetParameterView::commitChanges(QModelIndex const&, QString const&, bool)>, o=0x555560fa0880, arg=0x7fffffffca20) at /usr/include/qt/QtCore/qobjectdefs_impl.h:152
#14 0x000055555573fecd in QtPrivate::FunctionPointer<void (AssetParameterView::*)(QModelIndex const&, QString const&, bool)>::call<QtPrivate::List<QModelIndex, QString, bool>, void>(void (AssetParameterView::*)(QModelIndex const&, QString const&, bool), AssetParameterView*, void**) (f=(void (AssetParameterView::*)(AssetParameterView * const, const QModelIndex &, const QString &, bool)) 0x55555573bc30 <AssetParameterView::commitChanges(QModelIndex const&, QString const&, bool)>, o=0x555560fa0880, arg=0x7fffffffca20) at /usr/include/qt/QtCore/qobjectdefs_impl.h:185
#15 0x000055555573fe12 in QtPrivate::QSlotObject<void (AssetParameterView::*)(QModelIndex const&, QString const&, bool), QtPrivate::List<QModelIndex, QString, bool>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, this_=0x5555611cb7e0, r=0x555560fa0880, a=0x7fffffffca20, ret=0x0) at /usr/include/qt/QtCore/qobjectdefs_impl.h:418
#16 0x00007ffff4f5b7cb in  () at /usr/lib/libQt5Core.so.5
#17 0x0000555555635c14 in AbstractParamWidget::valueChanged(QModelIndex, QString, bool) (this=0x5555646a2740, _t1=..., _t2=..., _t3=true) at kdenliveLib_autogen/KZ6M6CAXTA/moc_abstractparamwidget.cpp:195
        _a = {0x0, 0x7fffffffca60, 0x7fffffffcaa0, 0x7fffffffca1f}
#18 0x0000555555755826 in UrlListParamWidget::openFile() (this=0x5555646a2740) at /home/farid/kdenlive/src/assets/view/widgets/urllistparamwidget.cpp:188
        path = {static null = {<No data fields>}, d = 0x555560f34e10}
        filter = {static null = {<No data fields>}, d = 0x5555608b71e0}
        urlString = {static null = {<No data fields>}, d = 0x555556c7d820}
#19 0x0000555555758e88 in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (UrlListParamWidget::*)()>::call(void (UrlListParamWidget::*)(), UrlListParamWidget*, void**) (f=(void (UrlListParamWidget::*)(UrlListParamWidget * const)) 0x5555557555d0 <UrlListParamWidget::openFile()>, o=0x5555646a2740, arg=0x7fffffffcd60) at /usr/include/qt/QtCore/qobjectdefs_impl.h:152
#20 0x0000555555758ded in QtPrivate::FunctionPointer<void (UrlListParamWidget::*)()>::call<QtPrivate::List<>, void>(void (UrlListParamWidget::*)(), UrlListParamWidget*, void**) (f=(void (UrlListParamWidget::*)(UrlListParamWidget * const)) 0x5555557555d0 <UrlListParamWidget::openFile()>, o=0x5555646a2740, arg=0x7fffffffcd60) at /usr/include/qt/QtCore/qobjectdefs_impl.h:185
#21 0x0000555555758d32 in QtPrivate::QSlotObject<void (UrlListParamWidget::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, this_=0x555560f5dcb0, r=0x5555646a2740, a=0x7fffffffcd60, ret=0x0) at /usr/include/qt/QtCore/qobjectdefs_impl.h:418
#22 0x00007ffff4f5b7cb in  () at /usr/lib/libQt5Core.so.5
#23 0x00007ffff61715e3 in QAbstractButton::clicked(bool) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007ffff617186c in  () at /usr/lib/libQt5Widgets.so.5
#25 0x00007ffff6173474 in  () at /usr/lib/libQt5Widgets.so.5
#26 0x00007ffff6173695 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () at /usr/lib/libQt5Widgets.so.5
#27 0x00007ffff627161b in QToolButton::mouseReleaseEvent(QMouseEvent*) () at /usr/lib/libQt5Widgets.so.5
#28 0x00007ffff60bd0be in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#29 0x00007ffff6079d62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#30 0x00007ffff6081ac9 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#31 0x00007ffff4f2441a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#32 0x00007ffff608057b in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () at /usr/lib/libQt5Widgets.so.5
#33 0x00007ffff60d6a84 in  () at /usr/lib/libQt5Widgets.so.5
#34 0x00007ffff60d9db5 in  () at /usr/lib/libQt5Widgets.so.5
#35 0x00007ffff6079d62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#36 0x00007ffff4f2441a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#37 0x00007ffff597d1f0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib/libQt5Gui.so.5
#38 0x00007ffff59527d5 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#39 0x00007ffff0089fcc in  () at /usr/lib/libQt5XcbQpa.so.5
#40 0x00007ffff31ff4dc in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#41 0x00007ffff3253799 in  () at /usr/lib/libglib-2.0.so.0
#42 0x00007ffff31fcbc1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#43 0x00007ffff4f7d046 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#44 0x00007ffff4f22d8c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#45 0x00007ffff4f2b2f4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#46 0x000055555562d279 in main(int, char**) (argc=1, argv=0x7fffffffe568) at /home/farid/kdenlive/src/main.cpp:283
        app = <incomplete type>
        pixmap = <incomplete type>
        splash = {<QSplashScreen> = {<No data fields>}, static staticMetaObject = {d = {superdata = {direct = 0x7ffff65b4a00 <QSplashScreen::staticMetaObject>}, stringdata = 0x555555feddc0 <qt_meta_stringdata_Splash>, data = 0x555555fd5340 <qt_meta_data_Splash>, static_metacall = 0x555555647cf0 <Splash::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, m_progress = 0, m_pbStyle = <incomplete type>}
        config = {d = 0x55555647d6e0}
        grp = <incomplete type>
        programDBusService = <incomplete type>
        forceBreeze = false
        aboutData = <incomplete type>
        parser = <incomplete type>
        clipsToLoad = {static null = {<No data fields>}, d = 0x7ffff500daa0 <QArrayData::shared_null>}
        url = {d = 0x0}
        result = 0

[ddennedy]

That stack trace does help pin-point the previous one, but the thing is I am not reproducing it in Shotcut for the lut3d filter, and a review of the code in that area is not revealing anything to me unless the state of the filter is invalid somehow. It has been a long time since I have built kdenlive, and I am struggling to get it going. I am not so interested in a build script because then I would need to figure out how to ensure a debug build and how to use my changes to MLT. So, at this point, I do need a developer affected by the problem to dig deeper since I am not reproducing it otherwise.

[frdbr]

Will ping the Kdenlive devs. Which version of ffmpeg are you using btw? 4.4?

[ddennedy]

Yes to v4.4 of FFmpeg