Hi there, I'm currently developing some functions for Kdenlive as my end of degree project, and I have come across a very critical error: Kdenlive will immediately crash after trying to add a clip in any format.
Here is the output I get from the console (After the third line is when I try to add the clip):

ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)
Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)
QObject::setParent: Cannot set parent, new parent is in a different thread
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdcec90), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdcec90), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdcec90), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdcec90), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPainter::begin: Paint device returned engine == 0, type: 2
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPainter::begin: Paint device returned engine == 0, type: 2
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPainter::begin: Paint device returned engine == 0, type: 2
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPainter::begin: Paint device returned engine == 0, type: 2
QPixmap: It is not safe to use pixmaps outside the GUI thread
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdcec90), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdcec90), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPainter::begin: Paint device returned engine == 0, type: 2
QPixmap: It is not safe to use pixmaps outside the GUI thread
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::LabelEngine(0xde0580), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject::installEventFilter(): Cannot filter events for objects in a different thread.
QObject::installEventFilter(): Cannot filter events for objects in a different thread.
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::LabelEngine(0xde0580), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
QObject: Cannot create children for a parent that is in a different thread.
(Parent is Oxygen::WidgetStateEngine(0xdbc480), parent's thread is QThread(0xd373d0), current thread is QThread(0x31da9f0)
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread
[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
kdenlive: ../../src/xcb_io.c:179: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.
KCrash: Application 'kdenlive' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
sock_file=/home/nemesis/.kde/socket-nemesis/kdeinit4__0
kdenlive: Fatal IO error: client killed

Could it be a problem with the installation of Qt? Any help would be greatly appreciated, thank you!

Greg