I experienced this issue here with 15.8.2, also using Arch Linux package.

I've downgraded to 15.8.1 and works ok.

KDE Frameworks 5.15.0
Qt 5.5.1 (built against 5.5.0)
The xcb windowing system

CONFIRMED

According to git bisect, 3c3877c27c9cd36da90b4a7f29d44390a5be825b is the first bad commit

I can confirm this too, 15.08.2 is completely unusable.

Looking at the git log, this might solve the issue:
https://quickgit.kde.org/?p=kdenlive.git&a=commitdiff&h=858a85523f1f9bbd3db5e8398cfebc63ea56c653
Can anyone test that?

Also, disabling the project monitor is a partial workaround. It's rather bad to not be able to preview what you're doing, but at least that allows you to do basic things like applying volume correction and switching tracks without immediate freezing.

i confirm, also using the archlinux package:

(gdb) run
Starting program: /usr/bin/kdenlive 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffe1788700 (LWP 6977)]
[New Thread 0x7fffd2573700 (LWP 6979)]
[New Thread 0x7fffd1d72700 (LWP 6980)]
[New Thread 0x7fffba3d0700 (LWP 6981)]
[New Thread 0x7fffb2516700 (LWP 6984)]
[New Thread 0x7fffb1312700 (LWP 6985)]
Invalid playlist
Removing cache at "/home/farid/.cache/kdenlive-thumbs.kcache"
Invalid playlist
[New Thread 0x7fffab666700 (LWP 6986)]
[Thread 0x7fffab666700 (LWP 6986) exited]
[New Thread 0x7fffab666700 (LWP 6987)]
[New Thread 0x7fffaa414700 (LWP 6988)]
[New Thread 0x7fffa9c13700 (LWP 6989)]
[New Thread 0x7fffa9412700 (LWP 6990)]
[New Thread 0x7fffa8c11700 (LWP 6991)]
QXcbConnection: XCB error: 8 (BadMatch), sequence: 714, resource id: 23068692, major code: 155 (Unknown), minor code: 11
 - - -- SEND AUDIO DATA
klauncher not running... launching kdeinit
Reusing existing ksycoca
Recreating ksycoca file ("/home/farid/.cache/ksycoca5_pt_Wq2gVyBzCFLMphrmGP94GenZFXA=", version 303)
modified: "video/mpeg.xml"
modified: "model/vrml.xml"
modified: "application/x-qtractor-archive.xml"
modified: "application/x-mswinurl.xml"
modified: "application/relax-ng-compact-syntax.xml"
modified: "application/x-virtualbox-vbox.xml"
modified: "application/vnd.ms-word.xml"
modified: "application/x-vnd.kde.plan.xml"
modified: "application/vnd.ms-powerpoint.slide.macroenabled.12.xml"
modified: "application/vnd.wordperfect.xml"
modified: "application/x-mif.xml"
modified: "application/vnd.ms-works.xml"
modified: "application/sdp.xml"
modified: "application/xml-external-parsed-entity.xml"
modified: "application/vnd.oasis.opendocument.spreadsheet.xml"
modified: "application/gnunet-directory.xml"
modified: "application/x-asp.xml"
modified: "application/x-chess-pgn.xml"
modified: "application/x-webarchive.xml"
modified: "application/x-virtualbox-hdd.xml"
modified: "application/x-font-framemaker.xml"
modified: "application/x-docbook+xml.xml"
modified: "application/x-magicpoint.xml"
modified: "application/x-sqlite3.xml"
modified: "application/x-glade.xml"
modified: "application/vnd.oasis.opendocument.text-master-template.xml"
modified: "application/x-vnd.kde.kugar.mixed.xml"
modified: "application/vnd.oasis.opendocument.formula.xml"
modified: "application/x-superkaramba.xml"
modified: "application/x-nautilus-link.xml"
modified: "application/vnd.hp-pcl.xml"
modified: "application/vnd.kde.kphotoalbum-import.xml"
modified: "application/vnd.symbian.install.xml"
modified: "application/x-tgif.xml"
modified: "application/x-lz4.xml"
modified: "application/vnd.tcpdump.pcap.xml"
modified: "application/x-spss-por.xml"
modified: "application/x-virtualbox-vhd.xml"
modified: "application/sql.xml"
modified: "application/x-mozilla-bookmarks.xml"
modified: "application/x-yaml.xml"
modified: "application/x-font-pcf.xml"
modified: "application/x-troff-man-compressed.xml"
modified: "application/x-lzop.xml"
modified: "application/x-audacity-project.xml"
modified: "application/vnd.stardivision.draw.xml"
modified: "application/x-dc-rom.xml"
modified: "application/pkcs8.xml"
modified: "application/vnd.ms-excel.sheet.binary.macroenabled.12.xml"
modified: "application/x-font-dos.xml"
modified: "application/x-kexiproject-sqlite3.xml"
modified: "application/x-sv4cpio.xml"
modified: "application/x-bcpio.xml"
modified: "application/mathematica.xml"
modified: "application/x-kdenlivetitle.xml"
modified: "application/x-sv4crc.xml"
modified: "application/x-windows-themepack.xml"
modified: "application/x-xzpdf.xml"
modified: "application/vnd.visio.xml"
modified: "application/pgp-signature.xml"
modified: "application/x-jbuilder-project.xml"
modified: "application/x-blender.xml"
modified: "application/x-ms-shortcut.xml"
modified: "application/x-uml.xml"
modified: "application/x-msx-rom.xml"
modified: "application/x-iff.xml"
modified: "application/x-pw.xml"
modified: "application/json.xml"
modified: "application/annodex.xml"
modified: "application/x-gnumeric.xml"
modified: "application/x-core.xml"
modified: "application/x-7z-compressed.xml"
modified: "application/x-kexi-connectiondata.xml"
modified: "application/x-cbr.xml"
modified: "application/x-kformula.xml"
modified: "application/vnd.ms-powerpoint.addin.macroenabled.12.xml"
modified: "application/x-markaby.xml"
modified: "application/vnd.oasis.opendocument.presentation-flat-xml.xml"
modified: "application/x-compressed-tar.xml"
modified: "application/vnd.oasis.opendocument.graphics.xml"
modified: "application/x-lzma-compressed-tar.xml"
modified: "application/x-cbz.xml"
modified: "application/x-abiword.xml"
modified: "application/pkix-cert.xml"
modified: "application/x-cue.xml"
modified: "application/x-x509-ca-cert.xml"
modified: "application/epub+zip.xml"
modified: "application/x-kgetlist.xml"
modified: "application/x-wpg.xml"
modified: "application/x-ms-dos-executable.xml"
modified: "application/x-riff.xml"
modified: "application/x-cpio-compressed.xml"
modified: "application/x-t602.xml"
modified: "application/x-virtualbox-vmdk.xml"
modified: "application/vnd.google-earth.kml+xml.xml"
modified: "application/x-slp.xml"
modified: "application/vnd.ms-word.template.macroenabled.12.xml"
modified: "application/vnd.palm.xml"
modified: "application/x-dvi.xml"
modified: "application/x-quanta.xml"
modified: "application/winhlp.xml"
modified: "application/xslt+xml.xml"
modified: "application/x-kdenlive.xml"
modified: "application/x-xz-compressed-tar.xml"
modified: "application/x-ufraw.xml"
modified: "application/vnd.ms-excel.template.macroenabled.12.xml"
modified: "application/x-font-type1.xml"
modified: "application/x-turtle.xml"
modified: "application/x-executable.xml"
modified: "application/x-hdf.xml"
modified: "application/x-desktop.xml"
modified: "application/x-font-tex.xml"
modified: "application/vnd.openxmlformats-officedocument.presentationml.template.xml"
modified: "application/vnd.oasis.opendocument.text-master.xml"
modified: "application/x-ole-storage.xml"
modified: "application/x-object.xml"
modified: "application/vnd.oasis.opendocument.text-flat-xml.xml"
modified: "application/mbox.xml"
modified: "application/x-kourse.xml"
modified: "application/x-project.xml"
modified: "application/pkcs7-mime.xml"
modified: "application/pkcs7-signature.xml"
modified: "application/pkix-pkipath.xml"
modified: "application/x-vnd.kde.kplato.work.xml"
modified: "application/x-kopete-emoticons.xml"
modified: "application/x-python-bytecode.xml"
modified: "application/x-font-otf.xml"
modified: "application/vnd.hp-hpgl.xml"
modified: "application/x-gdbm.xml"
modified: "application/vnd.mozilla.xul+xml.xml"
modified: "application/vnd.kde.okular-archive.xml"
modified: "application/x-lrzip-compressed-tar.xml"
modified: "application/x-vnd.kde.kplato.xml"
modified: "application/x-vnd.kde.contactgroup.xml"
modified: "application/x-virtualbox-ova.xml"
modified: "application/x-kudesigner.xml"
modified: "application/x-kseg.xml"
modified: "application/x-gba-rom.xml"
modified: "application/illustrator.xml"
modified: "application/vnd.sun.xml.base.xml"
modified: "application/x-gettext-translation.xml"
modified: "application/x-par2.xml"
modified: "application/x-netshow-channel.xml"
modified: "application/x-ipod-firmware.xml"
modified: "application/x-xliff.xml"
modified: "application/x-kivio.xml"
modified: "application/x-fictionbook+xml.xml"
modified: "application/x-e-theme.xml"
modified: "application/x-spkac+base64.xml"
modified: "application/x-pem-key.xml"
modified: "application/x-wais-source.xml"
modified: "application/vnd.stardivision.impress.xml"
modified: "application/x-matroska.xml"
modified: "application/gml+xml.xml"
modified: "application/x-pak.xml"
modified: "application/vnd.ms-project.xml"
modified: "application/vnd.ms-cab-compressed.xml"
modified: "application/x-tuberling.xml"
modified: "application/x-font-afm.xml"
modified: "application/x-kmplot.xml"
modified: "application/mathml+xml.xml"
modified: "application/vnd.oasis.opendocument.chart-template.xml"
modified: "application/x-spss-sav.xml"
modified: "application/vnd.ms-powerpoint.template.macroenabled.12.xml"
modified: "application/x-font-vfont.xml"
modified: "application/x-lhz.xml"
modified: "application/vnd.oasis.opendocument.presentation-template.xml"
modified: "application/vnd.oasis.opendocument.chart.xml"
modified: "application/x-cda.xml"
modified: "application/x-kword.xml"
modified: "application/vnd.kde.fontspackage.xml"
modified: "application/vnd.ms-asf.xml"
modified: "application/x-icq.xml"
modified: "application/vnd.openxmlformats-officedocument.presentationml.slideshow.xml"
modified: "application/x-zip-compressed-fb2.xml"
modified: "application/zip.xml"
modified: "application/x-lmms-project.xml"
modified: "application/x-wii-rom.xml"
modified: "application/vnd.oasis.opendocument.spreadsheet-flat-xml.xml"
modified: "application/ecmascript.xml"
modified: "application/pkix-crl.xml"
modified: "application/x-pkcs7-certificates.xml"
modified: "application/x-dia-shape.xml"
modified: "application/vnd.openofficeorg.extension.xml"
modified: "application/vnd.sun.xml.impress.xml"
modified: "application/x-kwallet.xml"
modified: "application/x-shared-library-la.xml"
modified: "application/vnd.ms-tnef.xml"
modified: "application/octet-stream.xml"
modified: "application/x-shar.xml"
modified: "application/vnd.ms-publisher.xml"
modified: "application/x-killustrator.xml"
modified: "application/x-java-archive.xml"
modified: "application/x-pef-executable.xml"
modified: "application/x-java-pack200.xml"
modified: "application/x-sharedlib.xml"
modified: "application/x-lzma.xml"
modified: "application/zlib.xml"
modified: "application/smil+xml.xml"
modified: "application/x-egon.xml"
modified: "application/x-rar.xml"
modified: "application/x-genesis-rom.xml"
modified: "application/pkcs12+pem.xml"
modified: "application/x-kspread-crypt.xml"
modified: "application/pkcs8+pem.xml"
modified: "application/x-stuffit.xml"
modified: "application/x-gzpdf.xml"
modified: "application/vnd.debian.binary-package.xml"
modified: "application/vnd.lotus-1-2-3.xml"
modified: "application/x-raw-disk-image.xml"
modified: "application/x-m4.xml"
modified: "application/x-alz.xml"
modified: "application/x-gzdvi.xml"
modified: "application/vnd.sun.xml.writer.xml"
modified: "application/x-kgeo.xml"
modified: "application/x-arj.xml"
modified: "application/pgp-encrypted.xml"
modified: "application/x-planperfect.xml"
modified: "application/xhtml+xml.xml"
modified: "application/vnd.nintendo.snes.rom.xml"
modified: "application/vnd.ms-access.xml"
modified: "application/xspf+xml.xml"
modified: "application/x-arc.xml"
modified: "application/x-smb-server.xml"
modified: "application/x-virtualbox-vbox-extpack.xml"
modified: "application/andrew-inset.xml"
modified: "application/atom+xml.xml"
modified: "application/x-aportisdoc.xml"
modified: "application/x-tarz.xml"
modified: "application/pgp-keys.xml"
modified: "application/x-netcdf.xml"
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modified: "application/msword-template.xml"
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modified: "application/dicom.xml"
modified: "application/x-lzip.xml"
modified: "application/x-frame.xml"
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modified: "application/x-n64-rom.xml"
modified: "application/vnd.adobe.flash.movie.xml"
modified: "application/x-cabri.xml"
modified: "application/x-kspread.xml"
modified: "application/vnd.oasis.opendocument.presentation.xml"
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modified: "application/x-cdrdao-toc.xml"
modified: "application/pkcs10+pem.xml"
modified: "application/vnd.oasis.opendocument.database.xml"
modified: "application/x-msi.xml"
modified: "application/x-dar.xml"
modified: "application/x-ktheme.xml"
modified: "application/x-nzb.xml"
modified: "application/x-drgeo.xml"
modified: "application/vnd.ms-wpl.xml"
modified: "application/x-cpio.xml"
modified: "application/x-macbinary.xml"
modified: "application/x-siag.xml"
modified: "application/oda.xml"
modified: "application/x-shorten.xml"
modified: "application/x-archive.xml"
modified: "application/x-quattropro.xml"
modified: "application/x-raw-disk-image-xz-compressed.xml"
modified: "application/x-ica.xml"
modified: "application/x-gtktalog.xml"
modified: "application/x-xbel.xml"
modified: "application/x-virtualbox-ovf.xml"
modified: "application/x-subrip.xml"
modified: "application/x-applix-word.xml"
modified: "application/x-font-linux-psf.xml"
modified: "application/ogg.xml"
modified: "application/x-sc.xml"
modified: "application/sieve.xml"
modified: "application/vnd.sun.xml.math.xml"
modified: "application/mac-binhex40.xml"
modified: "application/vnd.openxmlformats-officedocument.presentationml.slide.xml"
modified: "application/x-zerosize.xml"
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modified: "application/metalink4+xml.xml"
modified: "application/x-zoo.xml"
modified: "application/prs.plucker.xml"
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modified: "application/x-navi-animation.xml"
modified: "application/x-gzpostscript.xml"
modified: "application/vnd.oasis.opendocument.text.xml"
modified: "application/javascript.xml"
modified: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.xml"
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modified: "application/x-bzpdf.xml"
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modified: "application/x-qw.xml"
modified: "application/x-compress.xml"
modified: "application/vnd.stardivision.mail.xml"
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modified: "application/x-nes-rom.xml"
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modified: "application/x-pocket-word.xml"
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modified: "application/metalink+xml.xml"
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modified: "application/vnd.oasis.opendocument.text-template.xml"
modified: "application/vnd.oasis.opendocument.graphics-template.xml"
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modified: "application/x-tzo.xml"
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modified: "application/oxps.xml"
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modified: "application/x-kcsrc.xml"
modified: "application/pkix-crl+pem.xml"
modified: "application/x-kpovmodeler.xml"
modified: "application/x-lha.xml"
modified: "application/x-gz-font-linux-psf.xml"
modified: "application/x-wwf.xml"
modified: "application/pdf.xml"
modified: "application/x-kontour.xml"
modified: "application/x-mobipocket-ebook.xml"
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modified: "application/vnd.sun.xml.writer.template.xml"
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modified: "application/x-xz.xml"
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modified: "application/x-qpress.xml"
modified: "application/x-pc-engine-rom.xml"
modified: "application/x-ksysv-package.xml"
modified: "application/x-bittorrent.xml"
modified: "application/x-quicktime-media-link.xml"
modified: "application/x-font-tex-tfm.xml"
modified: "inode/vnd.kde.service.dacp.xml"
modified: "inode/vnd.kde.service.pulse-sink.xml"
modified: "inode/vnd.kde.service.presence.xml"
modified: "inode/vnd.kde.device.server.xml"
modified: "inode/vnd.kde.service.appletv-pair.xml"
modified: "inode/vnd.kde.service.unknown.xml"
modified: "inode/vnd.kde.service.upnp.printerenhanced1.xml"
modified: "inode/vnd.kde.service.h323.xml"
modified: "inode/vnd.kde.service.pulse-source.xml"
modified: "inode/vnd.kde.service.upnp.scanner1.xml"
modified: "inode/vnd.kde.service.upnp.mediarenderer1.xml"
modified: "inode/vnd.kde.device.printer.xml"
modified: "inode/vnd.kde.service.odisk.xml"
modified: "inode/vnd.kde.service.ksirk.xml"
modified: "inode/vnd.kde.service.upnp.digitalsecuritycamera1.xml"
modified: "inode/vnd.kde.device.router.xml"
modified: "inode/vnd.kde.service.rsync.xml"
modified: "inode/vnd.kde.service.airport.xml"
modified: "inode/fifo.xml"
modified: "inode/vnd.kde.service.upnp.internetgatewaydevice1.xml"
modified: "inode/vnd.kde.service.acrobat-server.xml"
modified: "inode/vnd.kde.service.pdl-datastream.xml"
modified: "inode/vnd.kde.device.workstation.xml"
modified: "inode/vnd.kde.service.ldap.xml"
modified: "inode/vnd.kde.service.upnp.landevice1.xml"
modified: "inode/vnd.kde.device.unknown.xml"
modified: "inode/vnd.kde.service.upnp.remoteuiclientdevice1.xml"
modified: "inode/vnd.kde.service.upnp.wanconnectiondevice1.xml"
modified: "inode/vnd.kde.service.ssh.xml"
modified: "inode/mount-point.xml"
modified: "inode/vnd.kde.service.http.xml"
modified: "inode/vnd.kde.service.upnp.wlanaccesspointdevice1.xml"
modified: "inode/vnd.kde.service.kbattleship.xml"
modified: "inode/symlink.xml"
modified: "inode/vnd.kde.service.rfb.xml"
modified: "inode/vnd.kde.service.upnp.remoteuiserverdevice1.xml"
modified: "inode/vnd.kde.service.upnp.mediaserver2.xml"
modified: "inode/vnd.kde.service.printer.xml"
modified: "inode/vnd.kde.service.couchdb_location.xml"
modified: "inode/vnd.kde.service.ggz.xml"
modified: "inode/vnd.kde.service.kfourinline.xml"
modified: "inode/vnd.kde.service.afpovertcp.xml"
modified: "inode/vnd.kde.service.ntp.xml"
modified: "inode/directory.xml"
modified: "inode/vnd.kde.service.rdp.xml"
modified: "inode/vnd.kde.service.raop.xml"
modified: "inode/vnd.kde.service.lskat.xml"
modified: "inode/vnd.kde.service.touch-able.xml"
modified: "inode/vnd.kde.service.net-assistant.xml"
modified: "inode/vnd.kde.service.upnp.hvac1.xml"
modified: "inode/vnd.kde.service.adobe-vc.xml"
modified: "inode/vnd.kde.service.upnp.unknown.xml"
modified: "inode/vnd.kde.service.maemo-inf.xml"
modified: "inode/vnd.kde.service.upnp.mediarenderer2.xml"
modified: "inode/vnd.kde.service.upnp.raserver1.xml"
modified: "inode/vnd.kde.service.pop3.xml"
modified: "inode/vnd.kde.service.workstation.xml"
modified: "inode/vnd.kde.service.giver.xml"
modified: "inode/vnd.kde.service.airmouse.xml"
modified: "inode/vnd.kde.service.ipp.xml"
modified: "inode/vnd.kde.service.realplayfavs.xml"
modified: "inode/vnd.kde.network.xml"
modified: "inode/vnd.kde.service.ftps.xml"
modified: "inode/vnd.kde.service.lobby.xml"
modified: "inode/vnd.kde.service.plasma.xml"
modified: "inode/vnd.kde.service.upnp.basicdevice1.xml"
modified: "inode/vnd.kde.service.webdav.xml"
modified: "inode/vnd.kde.service.pulse-server.xml"
modified: "inode/vnd.kde.service.upnp.lightingcontrols1.xml"
modified: "inode/vnd.kde.service.telnet.xml"
modified: "inode/vnd.kde.service.upnp.mediaserver3.xml"
modified: "inode/vnd.kde.service.xmpp-server.xml"
modified: "inode/vnd.kde.service.ftp.xml"
modified: "inode/vnd.kde.service.sftp-ssh.xml"
modified: "inode/vnd.kde.service.webdavs.xml"
modified: "inode/blockdevice.xml"
modified: "inode/vnd.kde.service.upnp.wfadevice1.xml"
modified: "inode/vnd.kde.service.upnp.solarprotectionblind1.xml"
modified: "inode/vnd.kde.service.upnp.mediaserver1.xml"
modified: "inode/vnd.kde.service.svn.xml"
modified: "inode/vnd.kde.service.udisks-ssh.xml"
modified: "inode/vnd.kde.service.daap.xml"
modified: "inode/vnd.kde.service.skype.xml"
modified: "inode/vnd.kde.device.scanner.xml"
modified: "inode/vnd.kde.service.upnp.wandevice1.xml"
modified: "inode/vnd.kde.service.imap.xml"
modified: "inode/vnd.kde.service.smb.xml"
modified: "inode/vnd.kde.service.sip.xml"
modified: "inode/vnd.kde.service.upnp.raclient1.xml"
modified: "inode/vnd.kde.service.sleep-proxy.xml"
modified: "inode/vnd.kde.service.nfs.xml"
modified: "inode/vnd.kde.service.appletv-itunes.xml"
modified: "inode/chardevice.xml"
modified: "inode/vnd.kde.service.eppc.xml"
modified: "inode/vnd.kde.service.postgresql.xml"
modified: "inode/socket.xml"
modified: "inode/vnd.kde.service.upnp.radiscoveryagent1.xml"
modified: "inode/vnd.kde.service.upnp.printerbasic1.xml"
modified: "inode/vnd.kde.service.nssocketport.xml"
modified: "inode/vnd.kde.service.home-sharing.xml"
modified: "inode/vnd.kde.service.libvirt.xml"
modified: "text/x-eiffel.xml"
modified: "text/htmlh.xml"
modified: "text/x-chdr.xml"
modified: "text/troff.xml"
modified: "text/vnd.rn-realtext.xml"
modified: "text/x-erlang.xml"
modified: "text/vnd.trolltech.linguist.xml"
modified: "text/vnd.wap.wml.xml"
modified: "text/x-uuencode.xml"
modified: "text/x-dcl.xml"
modified: "text/x-credits.xml"
modified: "text/x-tex.xml"
modified: "text/x-texinfo.xml"
modified: "text/x-idl.xml"
modified: "text/x-hex.xml"
modified: "text/x-objcsrc.xml"
modified: "text/x-mup.xml"
modified: "text/x-lilypond.xml"
modified: "text/x-gettext-translation-template.xml"
modified: "text/x-ooc.xml"
modified: "text/x-iptables.xml"
modified: "text/x-pascal.xml"
modified: "text/x-rpm-spec.xml"
modified: "text/x-uil.xml"
modified: "text/x-matlab.xml"
modified: "text/x-troff-me.xml"
modified: "text/x-microdvd.xml"
modified: "text/x-ms-regedit.xml"
modified: "text/x-c++hdr.xml"
modified: "text/x-readme.xml"
modified: "text/sgml.xml"
modified: "text/x-lua.xml"
modified: "text/x-dsl.xml"
modified: "text/x-makefile.xml"
modified: "text/vnd.wap.wmlscript.xml"
modified: "text/x-xges.xml"
modified: "text/x-gettext-translation.xml"
modified: "text/x-authors.xml"
modified: "text/cache-manifest.xml"
modified: "text/x-mrml.xml"
modified: "text/calendar.xml"
modified: "text/x-copying.xml"
modified: "text/plain.xml"
modified: "text/x-scons.xml"
modified: "text/markdown.xml"
modified: "text/x-patch.xml"
modified: "text/enriched.xml"
modified: "text/x-xmi.xml"
modified: "text/x-setext.xml"
modified: "text/x-txt2tags.xml"
modified: "text/x-subviewer.xml"
modified: "text/x-google-video-pointer.xml"
modified: "text/x-vnd.akonadi.socialfeeditem.xml"
modified: "text/x-bibtex.xml"
modified: "text/x-moc.xml"
modified: "text/vtt.xml"
modified: "text/x-scala.xml"
modified: "text/x-verilog.xml"
modified: "text/x-ocaml.xml"
modified: "text/x-fortran.xml"
modified: "text/x-literate-haskell.xml"
modified: "text/x-objchdr.xml"
modified: "text/vnd.sun.j2me.app-descriptor.xml"
modified: "text/x-opml+xml.xml"
modified: "text/x-install.xml"
modified: "text/x-uri.xml"
modified: "text/x-katefilelist.xml"
modified: "text/x-ssa.xml"
modified: "text/x-mpsub.xml"
modified: "text/x-c++src.xml"
modified: "text/x-python.xml"
modified: "text/x-csharp.xml"
modified: "text/rfc822-headers.xml"
modified: "text/x-svsrc.xml"
modified: "text/vnd.graphviz.xml"
modified: "text/x-tcl.xml"
modified: "text/css.xml"
modified: "text/tab-separated-values.xml"
modified: "text/x-ocl.xml"
modified: "text/xmcd.xml"
modified: "text/x-java.xml"
modified: "text/x-reject.xml"
modified: "text/x-qml.xml"
modified: "text/x-vhdl.xml"
modified: "text/x-emacs-lisp.xml"
modified: "text/x-troff-mm.xml"
modified: "text/x-mof.xml"
modified: "text/x-troff-ms.xml"
modified: "text/x-svhdr.xml"
modified: "text/x-haskell.xml"
modified: "text/x-go.xml"
modified: "text/x-xptv.xml"
modified: "text/x-nfo.xml"
modified: "text/x-modelica.xml"
modified: "text/x-cmake.xml"
modified: "text/richtext.xml"
modified: "text/x-vala.xml"
modified: "text/x-csrc.xml"
modified: "text/vcard.xml"
modified: "text/x-dsrc.xml"
modified: "text/csv.xml"
modified: "text/x-genie.xml"
modified: "text/wiki.xml"
modified: "text/x-changelog.xml"
modified: "text/x-cobol.xml"
modified: "text/x-ldif.xml"
modified: "text/spreadsheet.xml"
modified: "text/x-log.xml"
modified: "text/x-scheme.xml"
modified: "text/vnd.abc.xml"
modified: "text/x-xslfo.xml"
modified: "text/x-adasrc.xml"
modified: "text/html.xml"
modified: "text/x-imelody.xml"
modified: "message/external-body.xml"
modified: "message/delivery-status.xml"
modified: "message/news.xml"
modified: "message/rfc822.xml"
modified: "message/disposition-notification.xml"
modified: "message/partial.xml"
modified: "message/x-gnu-rmail.xml"
modified: "audio/vnd.dts.hd.xml"
modified: "audio/basic.xml"
modified: "audio/webm.xml"
modified: "audio/annodex.xml"
modified: "audio/x-psf.xml"
modified: "audio/x-mo3.xml"
modified: "audio/aac.xml"
modified: "audio/x-minipsf.xml"
modified: "audio/x-xi.xml"
modified: "audio/x-ms-asx.xml"
modified: "audio/x-riff.xml"
modified: "audio/x-musepack.xml"
modified: "audio/x-aifc.xml"
modified: "audio/x-xmf.xml"
modified: "audio/x-scpls.xml"
modified: "audio/x-mpegurl.xml"
modified: "audio/x-aiff.xml"
modified: "audio/x-matroska.xml"
modified: "audio/x-gsm.xml"
modified: "audio/x-wav.xml"
modified: "audio/x-speex+ogg.xml"
modified: "audio/mpeg.xml"
modified: "audio/vnd.dts.xml"
modified: "audio/vnd.rn-realaudio.xml"
modified: "audio/x-wavpack-correction.xml"
modified: "audio/x-adpcm.xml"
modified: "audio/ac3.xml"
modified: "audio/flac.xml"
modified: "audio/mp2.xml"
modified: "audio/prs.sid.xml"
modified: "audio/x-m4b.xml"
modified: "audio/x-flac+ogg.xml"
modified: "audio/x-tta.xml"
modified: "audio/x-psflib.xml"
modified: "audio/amr-wb.xml"
modified: "audio/ogg.xml"
modified: "audio/x-ms-wma.xml"
modified: "audio/x-pn-realaudio-plugin.xml"
modified: "audio/x-it.xml"
modified: "audio/x-s3m.xml"
modified: "audio/x-mod.xml"
modified: "audio/midi.xml"
modified: "audio/x-stm.xml"
modified: "audio/x-iriver-pla.xml"
modified: "audio/x-xm.xml"
modified: "audio/x-amzxml.xml"
modified: "audio/amr.xml"
modified: "audio/x-opus+ogg.xml"
modified: "audio/x-vorbis+ogg.xml"
modified: "audio/x-wavpack.xml"
modified: "audio/x-ape.xml"
modified: "audio/x-voc.xml"
modified: "audio/x-speex.xml"
modified: "audio/mp4.xml"
modified: "x-content/blank-dvd.xml"
modified: "x-content/audio-player.xml"
modified: "x-content/video-bluray.xml"
modified: "x-content/audio-dvd.xml"
modified: "x-content/video-dvd.xml"
modified: "x-content/video-vcd.xml"
modified: "x-content/image-picturecd.xml"
modified: "x-content/audio-cdda.xml"
modified: "x-content/video-hddvd.xml"
modified: "x-content/blank-bd.xml"
modified: "x-content/win32-software.xml"
modified: "x-content/software.xml"
modified: "x-content/video-svcd.xml"
modified: "x-content/ebook-reader.xml"
modified: "x-content/blank-hddvd.xml"
modified: "x-content/blank-cd.xml"
modified: "x-content/image-dcf.xml"
modified: "x-content/unix-software.xml"
modified: "image/x-xbitmap.xml"
modified: "image/vnd.adobe.photoshop.xml"
modified: "image/x-lwo.xml"
modified: "image/x-tiff-multipage.xml"
modified: "image/x-olympus-orf.xml"
modified: "image/x-sony-srf.xml"
modified: "image/dpx.xml"
modified: "image/jpeg.xml"
modified: "image/x-sgi.xml"
modified: "image/rle.xml"
modified: "image/x-minolta-mrw.xml"
modified: "image/x-portable-bitmap.xml"
modified: "image/fax-g3.xml"
modified: "image/x-niff.xml"
modified: "image/x-portable-pixmap.xml"
modified: "image/x-kodak-kdc.xml"
modified: "image/x-pentax-pef.xml"
modified: "image/g3fax.xml"
modified: "image/x-xcursor.xml"
modified: "image/x-quicktime.xml"
modified: "image/bmp.xml"
modified: "image/x-applix-graphics.xml"
modified: "image/x-fpx.xml"
modified: "image/x-rgb.xml"
modified: "image/x-photo-cd.xml"
modified: "image/x-msod.xml"
modified: "image/jp2.xml"
modified: "image/vnd.djvu.xml"
modified: "image/x-xwindowdump.xml"
modified: "image/vnd.dxf.xml"
modified: "image/x-icns.xml"
modified: "image/x-kodak-dcr.xml"
modified: "image/x-panasonic-raw2.xml"
modified: "image/cgm.xml"
modified: "image/x-dib.xml"
modified: "image/x-canon-crw.xml"
modified: "image/png.xml"
modified: "image/x-macpaint.xml"
modified: "image/x-r16.xml"
modified: "image/x-pcx.xml"
modified: "image/x-kodak-k25.xml"
modified: "image/x-dds.xml"
modified: "image/x-3ds.xml"
modified: "image/x-dcraw.xml"
modified: "image/x-emf.xml"
modified: "image/vnd.wap.wbmp.xml"
modified: "image/x-cmu-raster.xml"
modified: "image/x-compressed-xcf.xml"
modified: "image/x-fuji-raf.xml"
modified: "image/tiff.xml"
modified: "image/x-sony-arw.xml"
modified: "image/x-tga.xml"
modified: "image/vnd.dwg.xml"
modified: "image/x-sigma-x3f.xml"
modified: "image/x-win-bitmap.xml"
modified: "image/x-gzeps.xml"
modified: "image/x-xcf.xml"
modified: "image/x-xpixmap.xml"
modified: "image/fits.xml"
modified: "image/webp.xml"
modified: "image/openraster.xml"
modified: "image/x-r8.xml"
modified: "image/vnd.microsoft.icon.xml"
modified: "image/vnd.rn-realpix.xml"
modified: "image/gif.xml"
modified: "image/x-adobe-dng.xml"
modified: "image/x-canon-cr2.xml"
modified: "image/x-kde-raw.xml"
modified: "image/x-bzeps.xml"
modified: "image/svg+xml.xml"
modified: "image/svg+xml-compressed.xml"
modified: "image/x-exr.xml"
modified: "image/x-portable-anymap.xml"
modified: "image/x-wmf.xml"
modified: "image/x-svm.xml"
modified: "image/x-pict.xml"
modified: "image/x-hdr.xml"
modified: "image/x-portable-graymap.xml"
modified: "image/x-eps.xml"
modified: "image/x-pic.xml"
modified: "image/x-xfig.xml"
modified: "image/x-skencil.xml"
modified: "image/x-nikon-nef.xml"
modified: "image/x-ilbm.xml"
modified: "image/x-webp.xml"
modified: "image/vnd.ms-modi.xml"
modified: "image/x-sony-sr2.xml"
modified: "image/x-lws.xml"
modified: "image/ief.xml"
modified: "image/x-jng.xml"
modified: "image/x-panasonic-raw.xml"
modified: "image/x-sun-raster.xml"
modified: "video/x-matroska-3d.xml"
modified: "video/x-ms-wmv.xml"
modified: "video/webm.xml"
modified: "video/annodex.xml"
modified: "video/isivideo.xml"
modified: "video/x-theora+ogg.xml"
modified: "video/x-flv.xml"
modified: "video/x-matroska.xml"
modified: "video/3gpp.xml"
modified: "video/x-ogm+ogg.xml"
modified: "video/x-flic.xml"
modified: "video/x-msvideo.xml"
modified: "video/vnd.mpegurl.xml"
modified: "video/x-nsv.xml"
modified: "video/dv.xml"
modified: "video/x-anim.xml"
modified: "video/mp2t.xml"
modified: "video/mlt-playlist.xml"
modified: "video/ogg.xml"
modified: "video/3gpp2.xml"
modified: "video/x-javafx.xml"
modified: "video/x-sgi-movie.xml"
modified: "video/x-ms-wmp.xml"
modified: "video/wavelet.xml"
modified: "video/x-mng.xml"
modified: "video/vnd.rn-realvideo.xml"
modified: "video/vnd.vivo.xml"
modified: "video/mp4.xml"
modified: "video/quicktime.xml"
modified: "all/all.xml"
modified: "all/allfiles.xml"
modified: "multipart/x-mixed-replace.xml"
modified: "multipart/encrypted.xml"
modified: "multipart/related.xml"
modified: "multipart/report.xml"
modified: "multipart/digest.xml"
modified: "multipart/signed.xml"
modified: "multipart/mixed.xml"
modified: "multipart/alternative.xml"
modified: "multipart/appledouble.xml"
modified: "x-epoc/x-sisx-app.xml"
Still in the time dict (i.e. deleted files) ("apps")
Saving
KServiceTypeTrader: serviceType "ThumbCreator" not found
KServiceTypeTrader: serviceType "ThumbCreator" not found
KServiceTypeTrader: serviceType "ThumbCreator" not found
KServiceTypeTrader: serviceType "ThumbCreator" not found
KSambaShare: Could not find smb.conf!
[Thread 0x7fffab666700 (LWP 6987) exited]
[Thread 0x7fffa8c11700 (LWP 6991) exited]
Invalid playlist
[Thread 0x7fffa9c13700 (LWP 6989) exited]
Invalid playlist
Invalid playlist
[New Thread 0x7fffa9c13700 (LWP 6998)]
[New Thread 0x7fffa8c11700 (LWP 6999)]
[New Thread 0x7fffab666700 (LWP 7000)]
[New Thread 0x7fff97fff700 (LWP 7001)]
[New Thread 0x7fff977fe700 (LWP 7002)]
[New Thread 0x7fff96ffd700 (LWP 7003)]
[swscaler @ 0x7fff87779300] Warning: data is not aligned! This can lead to a speedloss
[New Thread 0x7fff967fc700 (LWP 7004)]
[New Thread 0x7fff95ffb700 (LWP 7005)]
[Thread 0x7fff95ffb700 (LWP 7005) exited]
[New Thread 0x7fff95ffb700 (LWP 7006)]
[New Thread 0x7fff957fa700 (LWP 7007)]
[New Thread 0x7fff94ff9700 (LWP 7008)]
 - - -- SEND AUDIO DATA
[New Thread 0x7fff8ffff700 (LWP 7009)]
[Thread 0x7fff95ffb700 (LWP 7006) exited]
[Thread 0x7fff94ff9700 (LWP 7008) exited]
Invalid playlist
[Thread 0x7fff957fa700 (LWP 7007) exited]
[New Thread 0x7fff957fa700 (LWP 7010)]
[Thread 0x7fff957fa700 (LWP 7010) exited]
[New Thread 0x7fff957fa700 (LWP 7011)]
[New Thread 0x7fff94ff9700 (LWP 7012)]
[New Thread 0x7fff95ffb700 (LWP 7013)]
 - - -- SEND AUDIO DATA
[Thread 0x7fff957fa700 (LWP 7011) exited]
[Thread 0x7fff95ffb700 (LWP 7013) exited]
Invalid playlist
[Thread 0x7fff94ff9700 (LWP 7012) exited]
[New Thread 0x7fff94ff9700 (LWP 7017)]
[Thread 0x7fff94ff9700 (LWP 7017) exited]
[New Thread 0x7fff94ff9700 (LWP 7018)]
[New Thread 0x7fff95ffb700 (LWP 7019)]
[New Thread 0x7fff957fa700 (LWP 7020)]
 - - -- SEND AUDIO DATA
[Thread 0x7fff94ff9700 (LWP 7018) exited]
[Thread 0x7fff957fa700 (LWP 7020) exited]
Invalid playlist
[Thread 0x7fff95ffb700 (LWP 7019) exited]
[New Thread 0x7fff95ffb700 (LWP 7021)]
[Thread 0x7fff95ffb700 (LWP 7021) exited]
[New Thread 0x7fff95ffb700 (LWP 7022)]
[New Thread 0x7fff957fa700 (LWP 7023)]
[New Thread 0x7fff94ff9700 (LWP 7024)]
 - - -- SEND AUDIO DATA
[New Thread 0x7fff8f7fe700 (LWP 7025)]
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
+ ++  INSERT DROP:  0  /  QPointF(1438.2,5)
 DROP LIST :  ("1", "1753", "5259")
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
 - - -- SEND AUDIO DATA
[Thread 0x7fff8f7fe700 (LWP 7025) exited]
[Thread 0x7fff95ffb700 (LWP 7022) exited]
[Thread 0x7fff94ff9700 (LWP 7024) exited]
[Thread 0x7fff957fa700 (LWP 7023) exited]
[Thread 0x7fff967fc700 (LWP 7004) exited]
[Thread 0x7fff8ffff700 (LWP 7009) exited]
[Thread 0x7fffa9c13700 (LWP 6998) exited]

(In reply to Dainius Masiliūnas from comment #5)
> Looking at the git log, this might solve the issue:
> https://quickgit.kde.org/?p=kdenlive.
> git&a=commitdiff&h=858a85523f1f9bbd3db5e8398cfebc63ea56c653
> Can anyone test that?

Cool.
I've just tested tag v15.08.2 + cherry-picked 858a85523f1f9bbd3db5e8398cfebc63ea56c653 and I could not reproduce this bug anymore.

Just update core download links to the latest version, problem fixed.

*** This bug has been marked as a duplicate of bug 354045 ***

Surely you mean duplicate directly to bug #353936.