Hallo I'm using Kdenlive version 15.12.0 with
KDE Frameworks 5.15.0 , Qt 5.4.2 (compiled with 5.4.2) on Ubuntu 15.10

Im'm try to create a simple video with a .MOV trace and 2 title ! Kdenlive crash continuously

I start the program from termina and i've this message

Code: Select all

Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
QCoreApplication::postEvent: Unexpected null receiver
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
Opening a document with version  0.91  /  0.91
 // / processing file validate ok
***********
FOUND GUIDES:  0
**********
"Creating audio thumbnails (1/1)"
"Creating audio thumbnails (2/2)"
"Creating audio thumbnails (3/2)"
Sementation Error (core dump created)


How can I fix this problem ?

I try to open the file /var/crash/_usr_bin_kdenlive.1000.crash but is not easy for me found usefull informations

Thanks

How did you install your version of kdenlive ?

And how are you starting it ?

I use ppa for ubuntu 15.10 wily
http://ppa.launchpad.net/sunab/kdenlive-release/ubuntu

version Kdenlive 15.13.0
KDE Frameworks 5.15.0
Qt 5.4.2 (compilato con 5.4.2)
Il sistema di finestre xcb

from terminal i give the command kdenlive. After some easy commands (like play for exaple) kdenlive krash

Code: Select all

silvio@silvio-pc:~$ kdenlive
Could not find drkonqi at /usr/lib/x86_64-linux-gnu/libexec/drkonqi
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
QCoreApplication::postEvent: Unexpected null receiver
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
Opening a document with version  0.91  /  0.91
 // / processing file validate ok
***********
FOUND GUIDES:  0
**********
"Creating audio thumbnails (1/1)"
QXcbConnection: XCB error: 8 (BadMatch), sequence: 51938, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 51960, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 61217, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 61245, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 61267, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 9595, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 9624, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 9715, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 9750, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 12048, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 12077, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 12168, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 12203, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 14619, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 14675, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 14689, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 14718, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 15208, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 15238, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 15329, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 15364, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 15388, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4067, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4095, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4120, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4148, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4158, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4229, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4260, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4366, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4397, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4483, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4514, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4600, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4631, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4717, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4748, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4834, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4865, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 7000, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 7028, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 7053, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 7081, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 16173, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 16202, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 16293, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 16328, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20225, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20253, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20278, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20306, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20316, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20326, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20377, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20401, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20453, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 20477, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 25737, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 25765, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 25790, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 25818, resource id: 75498064, major code: 130 (Unknown), minor code: 3
"Trying to convert empty KLocalizedString to QString."
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32865, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32893, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32918, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32946, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 39859, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 39888, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 39913, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 39941, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 39951, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 40340, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 40368, resource id: 75498064, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 40393, resource id: 75498064, major code: 130 (Unknown), minor code: 3
Errore di segmentazione (core dump creato)

Same here, also ppa from sunab, Kubuntu 15.10.

You'll need to run Kdenlive from gdb in order to get a stack backtrace. This may shed more light on your issue.

i follow
https://userbase.kde.org/Kdenlive/Manual/BugReporting

the program krash with this result

Code: Select all

(gdb) run
Starting program: /usr/bin/kdenlive
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe32b0700 (LWP 10712)]
[New Thread 0x7fffd9a72700 (LWP 10713)]
[New Thread 0x7fffd9271700 (LWP 10714)]
[New Thread 0x7fffd8a70700 (LWP 10715)]
Could not find drkonqi at /usr/lib/x86_64-linux-gnu/libexec/drkonqi
[New Thread 0x7fffc7dd9700 (LWP 10717)]
[New Thread 0x7fffc75d8700 (LWP 10718)]
[Thread 0x7fffc7dd9700 (LWP 10717) exited]
[New Thread 0x7fffc7dd9700 (LWP 10719)]
[New Thread 0x7fffa3271700 (LWP 10720)]
[New Thread 0x7fffa2270700 (LWP 10721)]
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
[New Thread 0x7fff9bfff700 (LWP 10724)]
[New Thread 0x7fff937fe700 (LWP 10725)]
[New Thread 0x7fff9b7fe700 (LWP 10726)]
[New Thread 0x7fff9a867700 (LWP 10727)]
[New Thread 0x7fff9a066700 (LWP 10728)]
QCoreApplication::postEvent: Unexpected null receiver
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
Opening a document with version  0.91  /  0.91
 // / processing file validate ok
***********
FOUND GUIDES:  0
**********
"Creating audio thumbnails (1/1)"
[New Thread 0x7fff99865700 (LWP 10732)]
[Thread 0x7fff99865700 (LWP 10732) exited]
[New Thread 0x7fff99865700 (LWP 10733)]
[New Thread 0x7fff99064700 (LWP 10734)]
[New Thread 0x7fff98863700 (LWP 10735)]
[New Thread 0x7fff93fff700 (LWP 10736)]
[New Thread 0x7fff92ffd700 (LWP 10737)]
[New Thread 0x7fff927fc700 (LWP 10738)]
[New Thread 0x7fff91ffb700 (LWP 10739)]
[New Thread 0x7fff917fa700 (LWP 10740)]
[New Thread 0x7fff90ff9700 (LWP 10741)]
[New Thread 0x7fff7bfff700 (LWP 10742)]
[New Thread 0x7fff7b7fe700 (LWP 10743)]
[New Thread 0x7fff7affd700 (LWP 10744)]
[New Thread 0x7fff7a7fc700 (LWP 10745)]
[Thread 0x7fffc75d8700 (LWP 10718) exited]
[Thread 0x7fff7a7fc700 (LWP 10745) exited]
[Thread 0x7fff99865700 (LWP 10733) exited]
[Thread 0x7fff7affd700 (LWP 10744) exited]
[New Thread 0x7fff7affd700 (LWP 10746)]
[Thread 0x7fff99064700 (LWP 10734) exited]
[Thread 0x7fff7affd700 (LWP 10746) exited]
[New Thread 0x7fff7affd700 (LWP 10747)]
[New Thread 0x7fff99064700 (LWP 10748)]
[New Thread 0x7fff99865700 (LWP 10749)]
[New Thread 0x7fff7a7fc700 (LWP 10750)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff99064700 (LWP 10748)]
0x00007fffe585894c in QFontEngineFT::shouldUseDesignMetrics(QFlags<QFontEngine::ShaperFlag>) const () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
(gdb)

Does this help?

Code: Select all

Starting program: /usr/bin/kdenlive kdenlive
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe396b700 (LWP 10104)]
[New Thread 0x7fffc216b700 (LWP 10105)]
[New Thread 0x7fffbd911700 (LWP 10106)]
[New Thread 0x7fffbc910700 (LWP 10107)]
Removing cache at "/home/keast/.cache/kdenlive-thumbs.kcache"
[New Thread 0x7fffb5511700 (LWP 10108)]
[Thread 0x7fffb5511700 (LWP 10108) exited]
[New Thread 0x7fffb5511700 (LWP 10109)]
[Thread 0x7fffb5511700 (LWP 10109) exited]
[New Thread 0x7fffb5511700 (LWP 10110)]
[New Thread 0x7fffab989700 (LWP 10111)]
[New Thread 0x7fffaa2ef700 (LWP 10112)]
[New Thread 0x7fffa9aee700 (LWP 10114)]
[New Thread 0x7fffa90e0700 (LWP 10115)]
[New Thread 0x7fffa88df700 (LWP 10116)]
[New Thread 0x7fff9fffe700 (LWP 10118)]
[New Thread 0x7fff9f7fd700 (LWP 10119)]
[New Thread 0x7fff9effc700 (LWP 10120)]
[New Thread 0x7fff9e7fb700 (LWP 10121)]
[New Thread 0x7fff9d889700 (LWP 10122)]
[New Thread 0x7fff9d088700 (LWP 10124)]
[New Thread 0x7fff9c887700 (LWP 10128)]
[Thread 0x7fffb5511700 (LWP 10110) exited]
***********
FOUND GUIDES:  0
**********
[Thread 0x7fff9f7fd700 (LWP 10119) exited]
[Thread 0x7fff9effc700 (LWP 10120) exited]
[Thread 0x7fff9e7fb700 (LWP 10121) exited]
[Thread 0x7fffa9aee700 (LWP 10114) exited]
[Thread 0x7fffab989700 (LWP 10111) exited]
[Thread 0x7fffaa2ef700 (LWP 10112) exited]
[New Thread 0x7fffaa2ef700 (LWP 10130)]
[New Thread 0x7fffab989700 (LWP 10131)]
[New Thread 0x7fffa9aee700 (LWP 10132)]
[New Thread 0x7fff9e7fb700 (LWP 10133)]
[New Thread 0x7fffb5511700 (LWP 10134)]
[New Thread 0x7fffa3cc2700 (LWP 10135)]
[New Thread 0x7fffa34c1700 (LWP 10136)]
[Thread 0x7fffaa2ef700 (LWP 10130) exited]
QCoreApplication::postEvent: Unexpected null receiver
Removing cache at "/home/keast/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
Opening a document with version  0.91  /  0.91
 // / processing file validate ok
***********
FOUND GUIDES:  0
**********
"Creating audio thumbnails (1/1)"
"Creating audio thumbnails (2/9)"
"Creating audio thumbnails (3/9)"
"Creating audio thumbnails (4/9)"
"Creating audio thumbnails (5/9)"
"Creating audio thumbnails (6/9)"
"Creating audio thumbnails (7/9)"
"Creating audio thumbnails (8/9)"
"Creating audio thumbnails (9/9)"
"Creating audio thumbnails (10/9)"
[Thread 0x7fff9e7fb700 (LWP 10133) exited]
[Thread 0x7fffb5511700 (LWP 10134) exited]
[Thread 0x7fffa3cc2700 (LWP 10135) exited]
[Thread 0x7fffa9aee700 (LWP 10132) exited]
[Thread 0x7fff9d889700 (LWP 10122) exited]
[Thread 0x7fffab989700 (LWP 10131) exited]
[New Thread 0x7fffab989700 (LWP 10137)]
[New Thread 0x7fff9d889700 (LWP 10138)]
[New Thread 0x7fffa9aee700 (LWP 10139)]
[New Thread 0x7fffa3cc2700 (LWP 10140)]
[New Thread 0x7fffb5511700 (LWP 10141)]
[New Thread 0x7fffaa2ef700 (LWP 10142)]
[New Thread 0x7fffa2aba700 (LWP 10143)]
[New Thread 0x7fffa22b9700 (LWP 10144)]
[New Thread 0x7fffa1ab8700 (LWP 10145)]
[New Thread 0x7fffa12b7700 (LWP 10146)]
[Thread 0x7fffa12b7700 (LWP 10146) exited]
[New Thread 0x7fffa12b7700 (LWP 10147)]
[New Thread 0x7fffa0ab6700 (LWP 10148)]
[New Thread 0x7fff9f7fd700 (LWP 10149)]
[New Thread 0x7fff9effc700 (LWP 10150)]
[New Thread 0x7fff9e7fb700 (LWP 10151)]
[New Thread 0x7fff5ffff700 (LWP 10152)]
[New Thread 0x7fff5f7fe700 (LWP 10153)]
[New Thread 0x7fff5effd700 (LWP 10154)]
[New Thread 0x7fff5e7fc700 (LWP 10155)]
[New Thread 0x7fff5dffb700 (LWP 10156)]
[New Thread 0x7fff5d7fa700 (LWP 10157)]
[New Thread 0x7fff5cff9700 (LWP 10158)]
[New Thread 0x7fff2fffe700 (LWP 10159)]
[New Thread 0x7fff2f7fd700 (LWP 10160)]
[New Thread 0x7fff2effc700 (LWP 10161)]
[New Thread 0x7fff2e7fb700 (LWP 10162)]
[New Thread 0x7fff2dffa700 (LWP 10163)]
[New Thread 0x7fff2d7f9700 (LWP 10164)]
[New Thread 0x7fff2cff8700 (LWP 10165)]
[New Thread 0x7fff17fff700 (LWP 10166)]
[New Thread 0x7fff177fe700 (LWP 10167)]
[New Thread 0x7fff16ffd700 (LWP 10168)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffa0ab6700 (LWP 10148)]
0x00007fffc4f13a88 in ?? () from /usr/lib/mlt/libmltcore.so


Code: Select all

(gdb) bt
#0  0x00007fffc4f13a88 in ?? () from /usr/lib/mlt/libmltcore.so
#1  0x00007ffff6fdeee9 in mlt_frame_get_audio () from /usr/lib/libmlt.so.6
#2  0x00007ffff6ff48f6 in ?? () from /usr/lib/libmlt.so.6 
#3  0x00007ffff6fdeee9 in mlt_frame_get_audio () from /usr/lib/libmlt.so.6
#4  0x00007ffff6ff1cf2 in ?? () from /usr/lib/libmlt.so.6
#5  0x000000000088a97f in RenderThread::run() ()   
#6  0x00007ffff25222be in ?? () from /usr/lib/x86_64-linux-u/libQt5Core.so.5 
#7  0x00007ffff0a4b6aa in start_thread (arg=0x7fffa0ab6700) at pthread_create.c:333
#8  0x00007ffff1b32eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109   
(gdb)                                                                                                                                                                                                                                         

Thank you for posting the stack traces! What makes we wonder: Kdenlive seems to crash in different places, each run differently?

My step
1) gdb kdenlive
2) (gdb) run
3) in kdenlive open recent > my video in MOV format with 2 titles.
Any titles have a simple animation and a blur filter at the end
4) start play the movie ant kdenlive krask

ERROR REPORT

Code: Select all

run
Starting program: /usr/bin/kdenlive
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe32b0700 (LWP 12932)]
[New Thread 0x7fffd9a72700 (LWP 12933)]
[New Thread 0x7fffd9271700 (LWP 12934)]
[New Thread 0x7fffd8a70700 (LWP 12935)]
Could not find drkonqi at /usr/lib/x86_64-linux-gnu/libexec/drkonqi
[New Thread 0x7fffc7dd9700 (LWP 12937)]
[New Thread 0x7fffc75d8700 (LWP 12938)]
[Thread 0x7fffc7dd9700 (LWP 12937) exited]
[New Thread 0x7fffc7dd9700 (LWP 12939)]
[New Thread 0x7fffa3271700 (LWP 12975)]
[New Thread 0x7fffa2270700 (LWP 12976)]
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
[New Thread 0x7fff9bfff700 (LWP 12979)]
[New Thread 0x7fff9b7fe700 (LWP 12980)]
[New Thread 0x7fff9affd700 (LWP 12981)]
[New Thread 0x7fff9a066700 (LWP 12982)]
[New Thread 0x7fff99865700 (LWP 12983)]
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4657, resource id: 75497734, major code: 154 (Unknown), minor code: 11
[Thread 0x7fffc75d8700 (LWP 12938) exited]
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32339, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32361, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32389, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 32399, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 33701, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 33746, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 33783, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 33817, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 33903, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 33934, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 34020, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 34051, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 34137, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 34168, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 34254, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 34285, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57111, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57139, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57164, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57544, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57572, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57600, resource id: 75497798, major code: 130 (Unknown), minor code: 3
[Thread 0x7fff9affd700 (LWP 12981) exited]
[Thread 0x7fff9bfff700 (LWP 12979) exited]
[Thread 0x7fff9b7fe700 (LWP 12980) exited]
QCoreApplication::postEvent: Unexpected null receiver
Could not lock file: "/home/silvio/.local/share/stalefiles/kdenlive/principi-reiki-01.kdenlives77file_%2Fmnt%2Ff4fbfaaf-e55a-44fc-ab2d-a13a68186a06%2Fkdenlive%2Fprincipi-reikijLCSfs77"
Removing cache at "/home/silvio/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
Opening a document with version  0.91  /  0.91
 // / processing file validate ok
[New Thread 0x7fff9b7fe700 (LWP 12985)]
***********
FOUND GUIDES:  0
**********
"Creating audio thumbnails (1/1)"
QXcbConnection: XCB error: 8 (BadMatch), sequence: 36817, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 36846, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 36871, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 36899, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37004, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37115, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37139, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37152, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37223, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37254, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37281, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37355, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37386, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37410, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37423, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37494, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37525, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37552, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37626, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37657, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37746, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 37777, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53281, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53335, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53349, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53384, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53452, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53491, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53525, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53564, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53605, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53644, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53678, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53717, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53751, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53790, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53831, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53870, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53904, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53943, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 53977, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54016, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54408, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54462, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54476, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54505, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55199, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55262, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55290, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55541, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55627, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55747, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55861, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 55975, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 56045, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 56159, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 56321, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 56873, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57526, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 57640, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58105, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58219, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58691, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58818, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59343, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59468, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60042, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60236, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60923, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 61450, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 61979, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 62539, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 63068, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 63627, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 64158, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 64690, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 65219, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 243, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 696, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 1190, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 1384, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 1915, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 2397, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 2591, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 3160, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 3686, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4217, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 4748, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 5285, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 5816, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 6338, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 6782, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 7239, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 7340, resource id: 75497798, major code: 130 (Unknown), minor code: 3
[Thread 0x7fff9b7fe700 (LWP 12985) exited]
[New Thread 0x7fff9b7fe700 (LWP 12992)]
[Thread 0x7fff9b7fe700 (LWP 12992) exited]
[New Thread 0x7fff9b7fe700 (LWP 12993)]
[New Thread 0x7fff9bfff700 (LWP 12994)]
[New Thread 0x7fff9affd700 (LWP 12995)]
[New Thread 0x7fffc75d8700 (LWP 12996)]
[New Thread 0x7fff99064700 (LWP 12997)]
[New Thread 0x7fff98863700 (LWP 12998)]
[New Thread 0x7fff83fff700 (LWP 12999)]
[New Thread 0x7fff837fe700 (LWP 13000)]
[New Thread 0x7fff82ffd700 (LWP 13001)]
[New Thread 0x7fff827fc700 (LWP 13002)]
[New Thread 0x7fff81ffb700 (LWP 13003)]
[New Thread 0x7fff817fa700 (LWP 13004)]
[New Thread 0x7fff80eb9700 (LWP 13005)]
[New Thread 0x7fff5fffe700 (LWP 13006)]
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54373, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54427, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54441, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 54476, resource id: 75497798, major code: 130 (Unknown), minor code: 3
[Thread 0x7fff80eb9700 (LWP 13005) exited]
[Thread 0x7fff9b7fe700 (LWP 12993) exited]
[Thread 0x7fff817fa700 (LWP 13004) exited]
[Thread 0x7fff9bfff700 (LWP 12994) exited]
[New Thread 0x7fff9bfff700 (LWP 13007)]
[Thread 0x7fff9bfff700 (LWP 13007) exited]
[New Thread 0x7fff9bfff700 (LWP 13008)]
[New Thread 0x7fff817fa700 (LWP 13009)]
[New Thread 0x7fff9b7fe700 (LWP 13010)]
[New Thread 0x7fff80eb9700 (LWP 13011)]
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58782, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58811, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58836, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58864, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 58966, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59080, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59104, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59200, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59336, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59372, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59455, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59569, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59593, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59689, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59729, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59818, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 59929, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60043, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60154, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60178, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60274, resource id: 75497798, major code: 130 (Unknown), minor code: 3
QXcbConnection: XCB error: 8 (BadMatch), sequence: 60388, resource id: 75497798, major code: 130 (Unknown), minor code: 3
[Thread 0x7fff5fffe700 (LWP 13006) exited]
[Thread 0x7fff80eb9700 (LWP 13011) exited]
[Thread 0x7fff9bfff700 (LWP 13008) exited]
[Thread 0x7fff9b7fe700 (LWP 13010) exited]
[Thread 0x7fff817fa700 (LWP 13009) exited]
[New Thread 0x7fff817fa700 (LWP 13013)]
[Thread 0x7fff817fa700 (LWP 13013) exited]
[New Thread 0x7fff817fa700 (LWP 13014)]
[New Thread 0x7fff9b7fe700 (LWP 13015)]
[New Thread 0x7fff9bfff700 (LWP 13016)]
[New Thread 0x7fff80eb9700 (LWP 13017)]
[New Thread 0x7fff5fffe700 (LWP 13018)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff9b7fe700 (LWP 13015)]
0x00007fffe585894c in QFontEngineFT::shouldUseDesignMetrics(QFlags<QFontEngine::ShaperFlag>) const () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so


By "2 titles" do you refer to title clips made in Kdenlive?
If yes, do you have set the number of Kdenlive MLT threads (not number of render threads) to something higher than 1?
If also yes, can you try with number of MLT threads set to 1?

If not, I remember having read here in the Kdenlive forum that there are occasional crashes when using Kdenlive's/MLT's built-in titling. So far, this bug has escaped all attempts at fixing it.

So, you may want to try the work-around route: you can quickly and easily create your titles in Inkscape: for instance, for a 16:9 FullHD project simply set the document dimensions to be 1920×1080 pixels. Then add your text and optional graphics. Finally save as Inkscape .svg. Then add these titles to your project instead of the Kdenlive-made title clips. Save. Play project to see if it still crashes.

Personally, I've moved completely away from Kdenlive's titles and am solely using Inkscape for titling.