Hi and thanks for your bugreport. 

Can you reproduce the crash? If so, could you have a look at http://techbase.kde.org/Development/Tutorials/Debugging/How_to_create_useful_crash_reports, try to install the debugging packages for your distribution and post another (more verbose) backtrace for the crash? (A step-by-step instruction on how to reproduce the crash would also be helpful). If you cannot reproduce the crash, can you say what you were doing right before the crash?

i installed debugging libraries and produced the following backtrace typing

"dragon" (kubuntu amd64 kde-4.1.3)

Anwendung: Dragon Player (dragon), Signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0x7fefedee96f0 (LWP 7194)]
[New Thread 0x41250950 (LWP 7195)]
[KCrash handler]
#5  0x00007fefeaebc690 in strlen () from /lib/libc.so.6
#6  0x00007fefeae8544e in vfprintf () from /lib/libc.so.6
#7  0x00007fefeaf36d18 in __vsnprintf_chk () from /lib/libc.so.6
#8  0x00007fefeb4e5fad in ?? () from /usr/lib/libxine.so.1
#9  0x00007fefeb4c89f4 in xine_log () from /usr/lib/libxine.so.1
#10 0x00007fefeb4d3ecc in ?? () from /usr/lib/libxine.so.1
#11 0x00007fefe304dfc2 in ?? () from /usr/lib/kde4/phonon_xine.so
#12 0x00007fefe30515dc in KPluginFactory::createInstance<Phonon::Xine::Backend, QObject> () from /usr/lib/kde4/phonon_xine.so
#13 0x00007fefecfd3845 in KPluginFactory::create (this=0x1772b90, 
    iface=0x7fefec6b8040 "QObject", parentWidget=0x0, parent=0x0, 
    args=@0x7ffff5f1e630, keyword=@0x7ffff5f1e510)
    at /build/buildd/kde4libs-4.1.3/kdecore/util/kpluginfactory.cpp:189
#14 0x00007fefe38a95b9 in Phonon::KdePlatformPlugin::createBackend (
    this=<value optimized out>, newService={d = 0x7ffff5f1e710})
    at /usr/include/kpluginfactory.h:515
#15 0x00007fefe38aaf0d in Phonon::KdePlatformPlugin::createBackend (
    this=0x172d510)
    at /build/buildd/kdebase-runtime-4.1.3/phonon/platform_kde/kdepluginfactory.cpp:199
#16 0x00007fefecbd44c8 in ?? () from /usr/lib/libphonon.so.4
#17 0x00007fefecbd5407 in Phonon::Factory::backend ()
   from /usr/lib/libphonon.so.4
#18 0x00007fefecbd5710 in ?? () from /usr/lib/libphonon.so.4
#19 0x00007fefecbda326 in ?? () from /usr/lib/libphonon.so.4
#20 0x00007fefecbd9fcb in Phonon::VideoWidget::VideoWidget ()
   from /usr/lib/libphonon.so.4
#21 0x00000000004184b1 in VideoWindow (this=0x172b2e0, 
    parent=<value optimized out>)
    at /build/buildd/kdemultimedia-4.1.3/dragonplayer/src/app/videoWindow.cpp:90
#22 0x0000000000430a83 in MainWindow (this=0x1730930)
    at /build/buildd/kdemultimedia-4.1.3/dragonplayer/src/app/mainWindow.cpp:102
#23 0x000000000042b4bf in main (argc=1, argv=<value optimized out>)
    at /build/buildd/kdemultimedia-4.1.3/dragonplayer/src/app/main.cpp:56
#0  0x00007fefeaee2621 in nanosleep () from /lib/libc.so.6

A hopefully more helpful backtrace with libxine1-dbg installed:
Anwendung: Dragon Player (dragon), Signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0x7f533a1e46f0 (LWP 7496)]
[New Thread 0x42547950 (LWP 7497)]
[KCrash handler]
#5  0x00007f53371b7690 in strlen () from /lib/libc.so.6
#6  0x00007f533718044e in vfprintf () from /lib/libc.so.6
#7  0x00007f5337231d18 in __vsnprintf_chk () from /lib/libc.so.6
#8  0x00007f53377e0fad in scratch_printf (this=0x1431bd0, 
    format=0x7f532ecf0bf6 "load_plugins: Plugin %s gefunden\n", 
    argp=0x7fff42215530) at /usr/include/bits/stdio2.h:78
#9  0x00007f53377c39f4 in xine_log (this=0x142b810, buf=1, 
    format=0x7f532ecf0bf6 "load_plugins: Plugin %s gefunden\n") at xine.c:2245
#10 0x00007f53377ceecc in _register_plugins_internal (this=0x142b810, 
    file=0x0, info=0x7f532f56c680) at load_plugins.c:492
#11 0x00007f532f348fc2 in ?? () from /usr/lib/kde4/phonon_xine.so
#12 0x00007f532f34c5dc in KPluginFactory::createInstance<Phonon::Xine::Backend, QObject> () from /usr/lib/kde4/phonon_xine.so
#13 0x00007f53392ce845 in KPluginFactory::create (this=0x1425b90, 
    iface=0x7f53389b3040 "QObject", parentWidget=0x0, parent=0x0, 
    args=@0x7fff42216920, keyword=@0x7fff42216800)
    at /build/buildd/kde4libs-4.1.3/kdecore/util/kpluginfactory.cpp:189
#14 0x00007f532fba45b9 in Phonon::KdePlatformPlugin::createBackend (
    this=<value optimized out>, newService={d = 0x7fff42216a00})
    at /usr/include/kpluginfactory.h:515
#15 0x00007f532fba5f0d in Phonon::KdePlatformPlugin::createBackend (
    this=0x13e0510)
    at /build/buildd/kdebase-runtime-4.1.3/phonon/platform_kde/kdepluginfactory.cpp:199
#16 0x00007f5338ecf4c8 in ?? () from /usr/lib/libphonon.so.4
#17 0x00007f5338ed0407 in Phonon::Factory::backend ()
   from /usr/lib/libphonon.so.4
#18 0x00007f5338ed0710 in ?? () from /usr/lib/libphonon.so.4
#19 0x00007f5338ed5326 in ?? () from /usr/lib/libphonon.so.4
#20 0x00007f5338ed4fcb in Phonon::VideoWidget::VideoWidget ()
   from /usr/lib/libphonon.so.4
#21 0x00000000004184b1 in VideoWindow (this=0x13de2e0, 
    parent=<value optimized out>)
    at /build/buildd/kdemultimedia-4.1.3/dragonplayer/src/app/videoWindow.cpp:90
#22 0x0000000000430a83 in MainWindow (this=0x13e3930)
    at /build/buildd/kdemultimedia-4.1.3/dragonplayer/src/app/mainWindow.cpp:102
#23 0x000000000042b4bf in main (argc=1, argv=<value optimized out>)
    at /build/buildd/kdemultimedia-4.1.3/dragonplayer/src/app/main.cpp:56
#0  0x00007f53371dd621 in nanosleep () from /lib/libc.so.6

at least dragon works when i select gstreamer as audo backend ...

i meant audio backend, dragon fails when xine is choosen ..

It's crashing inside some string manipulation/copying. Is there anything "unusual" in the file name/meta data? Non-ascii characters, umlauts etc.

LC_ALL=C LANG=C dragon 

works even with xine backend

dragon (with LANG=de_DE.UTF-8) crashes

dragon with LC_ALL=de_DE.ISO-8859-15 crashes

all crashes without any parameter on start

phonon bug (because with gstreamer it works)

That's a bug in the german (and italian) translations of libxine. It translates "load_plugins: static plugin found\n" as "load_plugins: Plugin %s gefunden\n". The "%s" makes it expect another argument which isn't there which makes it crash.

So yes, for now the right solution is to delete the german translations of libxine.

*** Bug 173542 has been marked as a duplicate of this bug. ***

*** Bug 175155 has been marked as a duplicate of this bug. ***

*** Bug 176050 has been marked as a duplicate of this bug. ***

*** Bug 177650 has been marked as a duplicate of this bug. ***

*** Bug 177776 has been marked as a duplicate of this bug. ***

*** Bug 177574 has been marked as a duplicate of this bug. ***

*** Bug 179488 has been marked as a duplicate of this bug. ***

(In reply to comment #9)
> That's a bug in the german (and italian) translations of libxine. It translates
> "load_plugins: static plugin found\n" as "load_plugins: Plugin %s gefunden\n".
> The "%s" makes it expect another argument which isn't there which makes it
> crash.
> 
> So yes, for now the right solution is to delete the german translations of
> libxine.
> 


For "n00bs" like me, the translation file can be disabled with these two simple commands from the terminal:

# Italian version
cd /usr/share/locale-langpack/it/LC_MESSAGES/
sudo mv libxine1.mo libxine1.mo.bak

# German version
cd /usr/share/locale-langpack/de/LC_MESSAGES/
sudo mv libxine1.mo libxine1.mo.bak


This worked for my Ubuntu 8.10 AMD64 with language packs put on a vanilla installation.


Many thanks dudes! Now Amarok can rule my computer! :D

*** Bug 179647 has been marked as a duplicate of this bug. ***

*** Bug 180366 has been marked as a duplicate of this bug. ***

Comment #17 does the job for me !

I have to Ubuntu AMD64 !

Thanks

*** Bug 180478 has been marked as a duplicate of this bug. ***

*** Bug 180642 has been marked as a duplicate of this bug. ***

*** Bug 180701 has been marked as a duplicate of this bug. ***

*** Bug 180924 has been marked as a duplicate of this bug. ***

*** Bug 177207 has been marked as a duplicate of this bug. ***

Wouldn't it make sense to rename this error to something like
"Qt Pograms Crash on Phonon access"
so it would be a little bit easier to find this bug ? so 
there wouldn't be so much duplicates entered....

*** Bug 183257 has been marked as a duplicate of this bug. ***

Yes, this bug was when I'm listen the music with amarok,later I reboot my system and the problem,seems, solved.

*** Bug 183636 has been marked as a duplicate of this bug. ***

*** Bug 184125 has been marked as a duplicate of this bug. ***