[Pkg-kde-extras] Amarok crash probably due to gstreamer

Wed Aug 3 21:20:40 UTC 2016

Hi,

it's a bug in ffmpeg for which a patch exists already, and which is
also going to be worked around in the next release of gst-libav1.0.

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831529 which is
fixed in ffmpeg 7:3.1.1-4

Sebastian

On Wed, 2016-08-03 at 17:36 +0200, Giovanni Mascellani wrote:
> Hi.
> 
> I reported bug #833333 against the Amarok package, but it is probably
> due to gstreamer. So gstreamer maintainers are in Cc.
> 
>   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833333
> 
> I found how to intercept amarok's backtrace (use "amarok --nofork").
> So
> that is the backtrace:
> 
> > 
> > 0x00007ffff4a751c8 in __GI_raise (sig=sig at entry=6) at
> > ../sysdeps/unix/sysv/linux/raise.c:54
> > 54	../sysdeps/unix/sysv/linux/raise.c: File o directory non
> > esistente.
> > (gdb) bt
> > #0  0x00007ffff4a751c8 in __GI_raise (sig=sig at entry=6) at
> > ../sysdeps/unix/sysv/linux/raise.c:54
> > #1  0x00007ffff4a7664a in __GI_abort () at abort.c:89
> > #2  0x00007ffff1d7560b in init_context_defaults (s=s at entry=0x7ffe6c
> > 077ce0, codec=codec at entry=0x7ffff26bb900 <ff_h264_vaapi_encoder>)
> > at src/libavcodec/options.c:142
> > #3  0x00007ffff1d756d6 in avcodec_alloc_context3
> > (codec=0x7ffff26bb900 <ff_h264_vaapi_encoder>) at
> > src/libavcodec/options.c:163
> > #4  0x00007fff04558540 in gst_ffmpeg_cfg_install_property
> > (klass=0x7ffe6c077550, base=8) at gstavcfg.c:732
> > #5  0x00007fff0454ee53 in gst_ffmpegvidenc_class_init
> > (klass=0x7ffe6c077550) at gstavvidenc.c:225
> > #6  0x00007fffecf2722d in g_type_class_ref (pclass=0x7ffe6c077220,
> > node=0x7ffe6c076f40) at /build/glib2.0-vjfO_h/glib2.0-
> > 2.48.1/./gobject/gtype.c:2241
> > #7  0x00007fffecf2722d in g_type_class_ref (type=type at entry=1407307
> > 10847296) at /build/glib2.0-vjfO_h/glib2.0-
> > 2.48.1/./gobject/gtype.c:2956
> > #8  0x00007fffdf246da4 in gst_element_register (plugin=plugin at entry
> > =0xbe1160 [GstPlugin], name=name at entry=0x7ffe6c06eeb0
> > "avenc_h264_vaapi", rank=rank at entry=128, type=type at entry=1407307108
> > 47296) at gstelementfactory.c:243
> > #9  0x00007fff0454f5b3 in gst_ffmpegvidenc_register (plugin=plugin@
> > entry=0xbe1160 [GstPlugin]) at gstavvidenc.c:1009
> > #10 0x00007fff04541e20 in plugin_init (plugin=0xbe1160 [GstPlugin])
> > at gstav.c:158
> > #11 0x00007fffdf268537 in gst_plugin_register_func (plugin=0xbe1160
> > [GstPlugin], desc=0x7fff04770180 <gst_plugin_desc>, user_data=0x0)
> > at gstplugin.c:523
> > #12 0x00007fffdf26a425 in _priv_gst_plugin_load_file_for_registry
> > (filename=0xbe4d00 "/usr/lib/x86_64-linux-gnu/gstreamer-
> > 1.0/libgstlibav.so", registry=0x92b2b0 [GstRegistry], registry at entr
> > y=0x0, error=error at entry=0x7fff04f71800)
> >     at gstplugin.c:826
> > #13 0x00007fffdf26acea in gst_plugin_load_file (filename=<optimized
> > out>, error=error at entry=0x7fff04f71800) at gstplugin.c:680
> > #14 0x00007fffdf26b12c in gst_plugin_load_by_name (name=0xbe378a
> > "libav") at gstplugin.c:1265
> > #15 0x00007fffdf26ba8d in gst_plugin_feature_load (feature=feature@
> > entry=0xc0b360 [GstTypeFindFactory]) at gstpluginfeature.c:111
> > #16 0x00007fffdf2917e3 in gst_type_find_factory_call_function
> > (factory=0xc0b360 [GstTypeFindFactory], find=0x7fff04f718e0) at
> > gsttypefindfactory.c:210
> > #17 0x00007fffdf55e0c9 in gst_type_find_helper_get_range (obj=obj at e
> > ntry=0xd7eec0 [GstID3Demux], parent=parent at entry=0x0, func=func at ent
> > ry=0x7fffdad05600 <gst_tag_demux_read_range>, size=<optimized out>,
> > e
> > xtension=extension at entry=0x0, prob=prob at entry=0x7fff04f719ac) at
> > gsttypefindhelper.c:355
> > #18 0x00007fffdad02cc8 in gst_tag_demux_element_find
> > (demux=0xd7eec0 [GstID3Demux]) at gsttagdemux.c:1364
> > #19 0x00007fffdad03d8d in gst_tag_demux_element_loop
> > (demux=0xd7eec0 [GstID3Demux]) at gsttagdemux.c:1437
> > #20 0x00007fffdf28ce71 in gst_task_func (task=0x92d950 [GstTask])
> > at gsttask.c:332
> > #21 0x00007fffed8b855e in g_thread_pool_thread_proxy
> > (data=<optimized out>) at /build/glib2.0-vjfO_h/glib2.0-
> > 2.48.1/./glib/gthreadpool.c:307
> > #22 0x00007fffed8b7bc5 in g_thread_proxy (data=0x7ffe740fcde0) at
> > /build/glib2.0-vjfO_h/glib2.0-2.48.1/./glib/gthread.c:780
> > #23 0x00007ffff36d0464 in start_thread (arg=0x7fff04f72700) at
> > pthread_create.c:333
> > #24 0x00007ffff4b2930d in clone () at
> > ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
> 
> Which seems to indicate that the bug is in gstreamer1.0-libav. And
> actually upgrading that package to the experimental version (1.9.1-1)
> fixes the bug. So I leave it to the GStreamer maintainers to decide
> what
> to do with the bug (if 1.9.1-1 is planned to migrate to unstable and
> testing soon, there is no need to fix 1.8.2-1; if not, probably it is
> a
> good idea to do that).
> 
> Thanks, Giovanni.
> _______________________________________________
> pkg-gstreamer-maintainers mailing list
> pkg-gstreamer-maintainers at lists.alioth.debian.org
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-gstreamer
> -maintainers
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