Comment # 11 on bug 1074273 from Wolfgang Bauer

(In reply to Patrick Finie from comment #10)
> Installed the Phonon-vlc backend.  totem runs, kdenlive does not and crashes
> when i open it.  Might do a video bug report.
> 
> error output after installing the vlc backend.
> 
> (gdb) run                                                                   
> ...
> Thread 1 "kdenlive" received signal SIGSEGV, Segmentation fault.
> 0x00007fffa1f662a7 in ?? () from
> /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so

It was still using gstreamer.

Just for clarification: did you try to play a audio or video file with totem,
or did you just run it?

> went into KDE settings and set the vlc backend preference higher.
> 
> ......
> 
> 
> Works!

Ok, you probably changed that order manually in the past.
Anyway, using the vlc backend may be a "workaround" for you then.

So, can you please provide the list of installed gstreamer packages?
I.e. the output of "rpm -qa | grep gstreamer".