I have tried to render a little project and for any codec that I choose I get a crash. The syslog gives me this: Jul 28 09:52:34 mu-x220 systemd-coredump[82646]: Process 82642 (mlt-melt) of user 1000 dumped core. Stack trace of thread 82642: #0 0x00007f5b859ad9e5 raise (libc.so.6 + 0x3c9e5) #1 0x00007f5b85996895 abort (libc.so.6 + 0x25895) #2 0x00007f5b7d8f1a7f _ZNK14QMessageLogger5fatalEPKcz (libQt5Core.so.5 + 0x91a7f) #3 0x00007f5b7de65e85 _ZN13QFontDatabaseC2Ev.cold (libQt5Gui.so.5 + 0xeae85) #4 0x00007f5b746ca5cb _ZL5fontsv (libpbf.so + 0x2e5cb) #5 0x00007f5b746caa85 _ZN4Font13fromJsonArrayERK10QJsonArray (libpbf.so + 0x2ea85) #6 0x00007f5b746ba879 _ZN5Style5Layer6LayoutC1ERK11QJsonObject (libpbf.so + 0x1e879) #7 0x00007f5b746beee7 _ZN5Style5LayerC1ERK11QJsonObject (libpbf.so + 0x22ee7) #8 0x00007f5b746c08a0 _ZN5Style4loadERK7QString (libpbf.so + 0x248a0) #9 0x00007f5b746b5a88 _ZN9PBFPluginC2Ev (libpbf.so + 0x19a88) #10 0x00007f5b746d5375 qt_plugin_instance (libpbf.so + 0x39375) #11 0x00007f5b7dab3564 _ZN15QLibraryPrivate14pluginInstanceEv (libQt5Core.so.5 + 0x253564) #12 0x00007f5b7daae16d _ZNK14QFactoryLoader8instanceEi (libQt5Core.so.5 + 0x24e16d) #13 0x00007f5b7def0fa6 _ZL23createReadHandlerHelperP9QIODeviceRK10QByteArraybb (libQt5Gui.so.5 + 0x175fa6) #14 0x00007f5b7def1d84 _ZN19QImageReaderPrivate11initHandlerEv (libQt5Gui.so.5 + 0x176d84) #15 0x00007f5b7def27e0 _ZNK12QImageReader7canReadEv (libQt5Gui.so.5 + 0x1777e0) #16 0x00007f5b7ebc17fa init_qimage (libmltqt.so + 0x167fa) #17 0x00007f5b7ebbcdf5 producer_qimage_init (libmltqt.so + 0x11df5) #18 0x00007f5b85cf6542 mlt_factory_producer (libmlt.so.6 + 0x29542) #19 0x00007f5b7ea5308e create_producer (libmltcore.so + 0xa08e) #20 0x00007f5b7ea536a9 producer_loader_init (libmltcore.so + 0xa6a9) #21 0x00007f5b85cf6542 mlt_factory_producer (libmlt.so.6 + 0x29542) #22 0x00007f5b85d17c90 on_end_element (libmltxml.so + 0x9c90) #23 0x00007f5b856a10cd xmlParseEndTag1.constprop.0 (libxml2.so.2 + 0x4a0cd) #24 0x00007f5b856a11c4 xmlParseElementEnd (libxml2.so.2 + 0x4a1c4) #25 0x00007f5b856a5721 xmlParseContent (libxml2.so.2 + 0x4e721) #26 0x00007f5b856a6dc0 xmlParseDocument (libxml2.so.2 + 0x4fdc0) #27 0x00007f5b85d18dce producer_xml_init (libmltxml.so + 0xadce) #28 0x00007f5b85cf6542 mlt_factory_producer (libmlt.so.6 + 0x29542) #29 0x00007f5b7ea532a1 create_producer (libmltcore.so + 0xa2a1) #30 0x00007f5b7ea536a9 producer_loader_init (libmltcore.so + 0xa6a9) #31 0x00007f5b85cf6542 mlt_factory_producer (libmlt.so.6 + 0x29542) #32 0x00007f5b7ea547fa producer_melt_init (libmltcore.so + 0xb7fa) #33 0x00007f5b85cf6542 mlt_factory_producer (libmlt.so.6 + 0x29542) #34 0x0000558ec88772b5 main (mlt-melt + 0x32b5) #35 0x00007f5b85998042 __libc_start_main (libc.so.6 + 0x27042) #36 0x0000558ec887838e _start (mlt-melt + 0x438e) I have just installed kdenlive from the Fedora 32 packages. Unfortunately their backtrace infrastructure is being migrated, and they suggested that I open a bug report here. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 32 KDE Plasma Version: 20.04.1 KDE Frameworks Version: 5.70.0 Qt Version: 5.14.2
Please try with the current Kdenlive AppImage version 20.04.1b to see if there are any packaging issues https://files.kde.org/kdenlive/release/ If the problem/issue doesn't occur when using the AppImage, then it's your configuration or packaging.
I have tried the 20.04b AppImage and with that I was able to export the video just fine. I have reported the issue with Fedora as it seems to be a downstream problem. https://bugzilla.redhat.com/show_bug.cgi?id=1867377
Thank you for the feedback and contribution. Glad to hear it works.