Bug 374513 - Crash when playing around with bass effect
Summary: Crash when playing around with bass effect
Status: RESOLVED INTENTIONAL
Alias: None
Product: kdenlive
Classification: Applications
Component: Video Effects & Transitions (show other bugs)
Version: 16.12.0
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Vincent PINON
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-01-03 22:33 UTC by Christian Weiske
Modified: 2017-03-13 19:59 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:


Attachments
gdb bt full (8.86 KB, text/plain)
2017-01-03 22:33 UTC, Christian Weiske
Details
gdb thread apply all bt (21.48 KB, text/plain)
2017-01-03 22:33 UTC, Christian Weiske
Details

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Description Christian Weiske 2017-01-03 22:33:04 UTC
Created attachment 103181 [details]
gdb bt full

I was trying to find out how the bass effect works by randomly modifying each of the settable values to random values, and eventually kdenlive crashed.


Version info:
kdenlive Version 16.12.0
Using MLT version 6.3.0

KDE Frameworks 5.18.0
Qt 5.5.1 (kompiliert gegen 5.5.1)
Das xcb Fenstersystem
Comment 1 Christian Weiske 2017-01-03 22:33:16 UTC
Created attachment 103182 [details]
gdb thread apply all bt
Comment 2 farid 2017-02-06 17:24:45 UTC
I confirm using kdenlive-git and mlt 6.4.1 in archlinux.

[filt @ 0x7fff00c2ebe0] Invalid frequency 277000,000000. Frequency must be less than half the sample-rate 48000.
[filt @ 0x7fff00c2ebe0] Failed to configure output pad on filt
[filter avfilter.bass] Cannot configure the filter graph

Thread 39 "RenderThread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff698a7700 (LWP 12791)]
0x0000000000000000 in ?? ()
(gdb) thread apply all bt

Thread 53 (Thread 0x7ffef7ff7700 (LWP 12935)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 52 (Thread 0x7ffef87f8700 (LWP 12934)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 51 (Thread 0x7ffef8ff9700 (LWP 12933)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 50 (Thread 0x7ffef97fa700 (LWP 12932)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 49 (Thread 0x7ffef9ffb700 (LWP 12931)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 48 (Thread 0x7ffefa7fc700 (LWP 12930)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 47 (Thread 0x7ffefaffd700 (LWP 12929)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 46 (Thread 0x7ffefb7fe700 (LWP 12928)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 45 (Thread 0x7ffefbfff700 (LWP 12927)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffb68aa62b in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 44 (Thread 0x7fff10fe1700 (LWP 12923)):
#0  0x00007fffede5b4b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff080f4c6 in QWaitCondition::wait(QMutex*, unsigned long) ()
    at /usr/lib/libQt5Core.so.5
#2  0x00007ffff080abc4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 43 (Thread 0x7fff117e2700 (LWP 12922)):
#0  0x00007fffede5b4b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff080f4c6 in QWaitCondition::wait(QMutex*, unsigned long) ()
    at /usr/lib/libQt5Core.so.5
#2  0x00007ffff080abc4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
---Type <return> to continue, or q <return> to quit---
#4  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 42 (Thread 0x7fff9cad4700 (LWP 12796)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff0809a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 41 (Thread 0x7fff1f7fe700 (LWP 12793)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fffa61a26dd in  () at /usr/lib/mlt/libmltsdl.so
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 40 (Thread 0x7fff9489e700 (LWP 12792)):
#0  0x00007fffefe16551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fffe79cb79d in pa_mainloop_poll () at /usr/lib/libpulse.so.0
#2  0x00007fffe79cbd8e in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#3  0x00007fffa59d3eed in  () at /usr/lib/libSDL-1.2.so.0
#4  0x00007fffa59a7800 in  () at /usr/lib/libSDL-1.2.so.0
#5  0x00007fffa59affe8 in  () at /usr/lib/libSDL-1.2.so.0
#6  0x00007fffa59f18a9 in  () at /usr/lib/libSDL-1.2.so.0
#7  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 39 (Thread 0x7fff698a7700 (LWP 12791)):
#0  0x0000000000000000 in  ()
---Type <return> to continue, or q <return> to quit---
#1  0x00007fffb685dd8c in  () at /usr/lib/libavfilter.so.6
#2  0x00007fffb68870de in  () at /usr/lib/libavfilter.so.6
#3  0x00007fffb68881df in  () at /usr/lib/libavfilter.so.6
#4  0x00007fffb68550c3 in  () at /usr/lib/libavfilter.so.6
#5  0x00007fffb68870de in  () at /usr/lib/libavfilter.so.6
#6  0x00007fffb68881df in  () at /usr/lib/libavfilter.so.6
#7  0x00007fffb688c76f in  () at /usr/lib/libavfilter.so.6
#8  0x00007fffb6887302 in  () at /usr/lib/libavfilter.so.6
#9  0x00007fffb688b435 in  () at /usr/lib/libavfilter.so.6
#10 0x00007fffb688bda3 in av_buffersink_get_frame_flags () at /usr/lib/libavfilter.so.6
#11 0x00007fffb8d3021d in  () at /usr/lib/mlt/libmltavformat.so
#12 0x00007ffff6fe98b9 in mlt_frame_get_audio () at /usr/lib/libmlt.so.6
#13 0x00007fffa79a20db in  () at /usr/lib/mlt/libmltcore.so
#14 0x00007ffff6fe98b9 in mlt_frame_get_audio () at /usr/lib/libmlt.so.6
#15 0x00007ffff6fff3f6 in  () at /usr/lib/libmlt.so.6
#16 0x00007ffff6fe98b9 in mlt_frame_get_audio () at /usr/lib/libmlt.so.6
#17 0x00007ffff6ffc807 in  () at /usr/lib/libmlt.so.6
#18 0x00005555558e2980 in  ()
#19 0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#20 0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#21 0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 38 (Thread 0x7fff6e0a8700 (LWP 12790)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff6ffcbeb in mlt_consumer_rt_frame () at /usr/lib/libmlt.so.6
#2  0x00007fffa61a2b10 in  () at /usr/lib/mlt/libmltsdl.so
#3  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 27 (Thread 0x7fff690a6700 (LWP 12769)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fff3d5034bd in  () at /usr/lib/gio/modules/libdconfsettings.so
#4  0x00007fffe7c690d5 in  () at /usr/lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 21 (Thread 0x7fff3f0fe700 (LWP 12638)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff0809a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 20 (Thread 0x7fff3f9ff700 (LWP 12637)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff080f58b in QWaitCondition::wait(QMutex*, unsigned long) ()
    at /usr/lib/libQt5Core.so.5
#2  0x00007ffff6254665 in  () at /usr/lib/libQt5Quick.so.5
#3  0x00007ffff6254f72 in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7fff6e8a9700 (LWP 12633)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff0809a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
---Type <return> to continue, or q <return> to quit---
#6  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7fff6f1aa700 (LWP 12632)):
#0  0x00007fffede5b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff080f58b in QWaitCondition::wait(QMutex*, unsigned long) ()
    at /usr/lib/libQt5Core.so.5
#2  0x00007ffff6254665 in  () at /usr/lib/libQt5Quick.so.5
#3  0x00007ffff6254f72 in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7fff95f5d700 (LWP 12621)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe79d9ee1 in  () at /usr/lib/libpulse.so.0
#2  0x00007fffe79cb6f1 in pa_mainloop_poll () at /usr/lib/libpulse.so.0
#3  0x00007fffe79cbd8e in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#4  0x00007fffe79cbe40 in pa_mainloop_run () at /usr/lib/libpulse.so.0
#5  0x00007fffe79d9e29 in  () at /usr/lib/libpulse.so.0
#6  0x00007fffe110dfe8 in  () at /usr/lib/pulseaudio/libpulsecommon-10.0.so
#7  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7fff96be0700 (LWP 12614)):
#0  0x00007fffefe124ed in read () at /usr/lib/libc.so.6
#1  0x00007fffefdaaa90 in __GI__IO_file_underflow () at /usr/lib/libc.so.6
#2  0x00007fffefd9f448 in getdelim () at /usr/lib/libc.so.6
#3  0x00007fffa1cd3104 in  () at /usr/lib/libspeechd.so.2
#4  0x00007fffa1cd3350 in  () at /usr/lib/libspeechd.so.2
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fff97fff700 (LWP 12597)):
---Type <return> to continue, or q <return> to quit---
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff0809a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffff243a025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffa4330700 (LWP 12595)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff0809a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffff243a025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fffa0d76700 (LWP 12572)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffa0f9ed51 in  () at /usr/lib/libusb-1.0.so.0
#2  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fffcbfff700 (LWP 12570)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
---Type <return> to continue, or q <return> to quit---
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff0809a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffff2ecd125 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fffd2606700 (LWP 12569)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c41b12 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007fffd8fb0316 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007fffe7c690d5 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fffd2e07700 (LWP 12568)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fffe7c418e1 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fffe7c690d5 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fffdc624700 (LWP 12567)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe75848e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fffe7586679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fffdefaa239 in  () at /usr/lib/libQt5XcbQpa.so.5
---Type <return> to continue, or q <return> to quit---
#4  0x00007ffff080e6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fffede55454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffefe1f7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7ffff7ec9800 (LWP 12398)):
#0  0x00007fffefe1648d in poll () at /usr/lib/libc.so.6
#1  0x00007fffe7c41786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fffe7c4189c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff0a3e44f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffff09e7c9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#5  0x00007ffff09f01e4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#6  0x0000555555605002 in  ()
#7  0x00007fffefd57291 in __libc_start_main () at /usr/lib/libc.so.6
#8  0x00005555556058fa in _start ()
Comment 3 Wegwerf 2017-02-12 14:35:44 UTC
Erm, attaching only the thread that crash is sufficient; this is thread 39  as indicated above where the SIGSEGV happened. All other threads sit idly and their stack traces just add confusion and make it difficult to see the thread in question.
Comment 4 Wegwerf 2017-02-19 16:08:28 UTC
Okay, from looking at the crash details it's a crash in an libav filter. While some of them are enabled, this one looks like it needs to be blacklisted: it's a terribly plugin that doesn't work when it doesn't like its parameters, instead of simply falling back to a basic function, such as pass-through. With a parameter range being dependent on the samle rate this is a usability nightmare. So blacklisting it is probably the best way here, as working around these implicit parameter constraints is a lot of effort for nothing really gained. However, if you want to supply a patch this would change the situation, I think.
Comment 5 Wegwerf 2017-03-13 19:59:38 UTC
libav filters not fully supported yet.