(gdb) info threads
  Id   Target Id         Frame 
  11   Thread 0x7fffd7fff700 (LWP 3473) "vqueue:src" 0x00007ffff70751ef in __GI_ppoll (fds=0x7fffd0009fa0, nfds=1, timeout=<optimized out>, 
    sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:56
  10   Thread 0x7fffe1798700 (LWP 3472) "multiqueue0:src" pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  9    Thread 0x7fffe1f99700 (LWP 3471) "multiqueue0:src" pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  8    Thread 0x7fffe279a700 (LWP 3470) "multiqueue0:src" fill_filter_caches (mb_type=14344, h=0x7fffdc0b2c00) at libavcodec/h264_slice.c:1948
  7    Thread 0x7fffe2f9b700 (LWP 3469) "multiqueue0:src" pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  6    Thread 0x7ffff08a6700 (LWP 3467) "xvimagesink-eve" 0x00007ffff735cb9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
  5    Thread 0x7ffff2499700 (LWP 3466) "multiqueue0:src" pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
* 4    Thread 0x7ffff2c9a700 (LWP 3465) "matroskademux0:" g_logv (log_domain=0x7ffff7b81cb5 <g_log_domain_gstreamer> "GStreamer", 
    log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7ffff2c99a08) at /build/buildd/glib2.0-2.40.2/./glib/gmessages.c:1038
  3    Thread 0x7ffff3d15700 (LWP 3464) "gmain" 0x00007ffff707512d in poll () at ../sysdeps/unix/syscall-template.S:81
  2    Thread 0x7ffff4516700 (LWP 3463) "typefind:sink" pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  1    Thread 0x7ffff7fc8740 (LWP 3459) "lt-gst-launch-1" 0x00007ffff707512d in poll () at ../sysdeps/unix/syscall-template.S:81
(gdb) t a a bt

Thread 11 (Thread 0x7fffd7fff700 (LWP 3473)):
#0  0x00007ffff70751ef in __GI_ppoll (fds=0x7fffd0009fa0, nfds=1, timeout=<optimized out>, sigmask=sigmask@entry=0x0)
    at ../sysdeps/unix/sysv/linux/ppoll.c:56
#1  0x00007ffff7b409aa in ppoll (__ss=0x0, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>)
    at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  gst_poll_wait (set=0x7e2770, timeout=timeout@entry=33475549) at gstpoll.c:1248
#3  0x00007ffff7b556e2 in gst_system_clock_id_wait_jitter_unlocked (clock=0x7fffdc1d16b0, entry=0x7fffd0001d10, jitter=<optimized out>, restart=1)
    at gstsystemclock.c:684
#4  0x00007ffff7b0a66f in gst_clock_id_wait (id=0x7fffd0001d10, jitter=jitter@entry=0x7fffd7ffe310) at gstclock.c:538
#5  0x00007ffff4c2a343 in gst_base_sink_wait_clock (sink=sink@entry=0x7fffdc00c610, time=<optimized out>, time@entry=1867000000, 
    jitter=jitter@entry=0x7fffd7ffe310) at gstbasesink.c:2103
#6  0x00007ffff4c2b72b in gst_base_sink_do_sync (basesink=basesink@entry=0x7fffdc00c610, obj=obj@entry=0x7fffdc234130, 
    late=late@entry=0x7fffd7ffe508, step_end=step_end@entry=0x7fffd7ffe50c) at gstbasesink.c:2490
#7  0x00007ffff4c2c686 in gst_base_sink_chain_unlocked (basesink=basesink@entry=0x7fffdc00c610, obj=obj@entry=0x7fffdc234130, 
    is_list=is_list@entry=0, pad=<optimized out>) at gstbasesink.c:3398
#8  0x00007ffff4c2de24 in gst_base_sink_chain_main (basesink=0x7fffdc00c610, pad=<optimized out>, obj=0x7fffdc234130, is_list=0)
    at gstbasesink.c:3546
#9  0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7fffe80204d0) at gstpad.c:3977
#10 gst_pad_push_data (pad=pad@entry=0x7eb1a0, type=type@entry=4112, data=data@entry=0x7fffdc234130) at gstpad.c:4210
#11 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7eb1a0, buffer=buffer@entry=0x7fffdc234130) at gstpad.c:4321
#12 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234130) at gstghostpad.c:126
#13 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7fb910) at gstpad.c:3977
#14 gst_pad_push_data (pad=0x7fffe8021ab0, type=type@entry=4112, data=0x7fffdc234130) at gstpad.c:4210
#15 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4321
#16 0x00007ffff4c3bba9 in gst_base_transform_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstbasetransform.c:2281
#17 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7fffe8021ce0) at gstpad.c:3977
#18 gst_pad_push_data (pad=0x7fffe8021880, type=type@entry=4112, data=0x7fffdc234130) at gstpad.c:4210
#19 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4321
#20 0x00007ffff4c3bba9 in gst_base_transform_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstbasetransform.c:2281
#21 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7fffe8021650) at gstpad.c:3977
#22 gst_pad_push_data (pad=0x7fffdc2100c0, type=type@entry=4112, data=0x7fffdc234130) at gstpad.c:4210
#23 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4321
#24 0x00007ffff4c3bba9 in gst_base_transform_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstbasetransform.c:2281
---Type <return> to continue, or q <return> to quit---
#25 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7fffdc2102f0) at gstpad.c:3977
#26 gst_pad_push_data (pad=0x7fffdc210750, type=type@entry=4112, data=0x7fffdc234130) at gstpad.c:4210
#27 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4321
#28 0x00007ffff4c3bba9 in gst_base_transform_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstbasetransform.c:2281
#29 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7fffdc210520) at gstpad.c:3977
#30 gst_pad_push_data (pad=pad@entry=0x7fb6d0, type=type@entry=4112, data=data@entry=0x7fffdc234130) at gstpad.c:4210
#31 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7fb6d0, buffer=buffer@entry=0x7fffdc234130) at gstpad.c:4321
#32 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234130) at gstghostpad.c:126
#33 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234130, type=4112, pad=0x7eaf40) at gstpad.c:3977
#34 gst_pad_push_data (pad=0x7fffe8020fc0, type=type@entry=4112, data=data@entry=0x7fffdc234130) at gstpad.c:4210
#35 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7fffdc234130) at gstpad.c:4321
#36 0x00007ffff4540c2f in gst_queue_push_one (queue=0x7fffdc1d8050) at gstqueue.c:1337
#37 gst_queue_loop (pad=<optimized out>) at gstqueue.c:1484
#38 0x00007ffff7b5c331 in gst_task_func (task=0x7fffe801a170) at gsttask.c:331
#39 0x00007ffff75d988c in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:307
#40 0x00007ffff75d8f05 in g_thread_proxy (data=0x7fffdc20e8a0) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#41 0x00007ffff7355182 in start_thread (arg=0x7fffd7fff700) at pthread_create.c:312
#42 0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7fffe1798700 (LWP 3472)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe331a32d in frame_worker_thread (arg=0x7fffdc0b0808) at libavcodec/pthread_frame.c:133
#2  0x00007ffff7355182 in start_thread (arg=0x7fffe1798700) at pthread_create.c:312
#3  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7fffe1f99700 (LWP 3471)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe331a32d in frame_worker_thread (arg=0x7fffdc0b0670) at libavcodec/pthread_frame.c:133
#2  0x00007ffff7355182 in start_thread (arg=0x7fffe1f99700) at pthread_create.c:312
#3  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7fffe279a700 (LWP 3470)):
#0  fill_filter_caches (mb_type=14344, h=0x7fffdc0b2c00) at libavcodec/h264_slice.c:1948
#1  loop_filter (h=h@entry=0x7fffdc0b2c00, start_x=start_x@entry=0, end_x=<optimized out>) at libavcodec/h264_slice.c:2111
---Type <return> to continue, or q <return> to quit---
#2  0x00007fffe31b609e in decode_slice (avctx=<optimized out>, arg=arg@entry=0x7fffe2799dc8) at libavcodec/h264_slice.c:2249
#3  0x00007fffe31bb1c5 in ff_h264_execute_decode_slices (h=h@entry=0x7fffdc0b2c00, context_count=1) at libavcodec/h264_slice.c:2366
#4  0x00007fffe3185c72 in decode_nal_units (parse_extradata=0, buf_size=6386, buf=0x7fffdc2b4d80 "", h=0x7fffdc0b2c00) at libavcodec/h264.c:1657
#5  h264_decode_frame (avctx=0x7fffdc0b1a60, data=0x7fffdc0b1e80, got_frame=0x7fffdc0b0640, avpkt=<optimized out>) at libavcodec/h264.c:1777
#6  0x00007fffe331a396 in frame_worker_thread (arg=0x7fffdc0b04d8) at libavcodec/pthread_frame.c:145
#7  0x00007ffff7355182 in start_thread (arg=0x7fffe279a700) at pthread_create.c:312
#8  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fffe2f9b700 (LWP 3469)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe331a32d in frame_worker_thread (arg=0x7fffdc0b0340) at libavcodec/pthread_frame.c:133
#2  0x00007ffff7355182 in start_thread (arg=0x7fffe2f9b700) at pthread_create.c:312
#3  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7ffff08a6700 (LWP 3467)):
#0  0x00007ffff735cb9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff75da498 in g_usleep (microseconds=microseconds@entry=50000) at /build/buildd/glib2.0-2.40.2/./glib/gtimer.c:259
#2  0x00007ffff1623b3f in gst_xvimagesink_event_thread (xvimagesink=0x7fffdc00c610) at xvimagesink.c:583
#3  0x00007ffff75d8f05 in g_thread_proxy (data=0x7fffe8033720) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#4  0x00007ffff7355182 in start_thread (arg=0x7ffff08a6700) at pthread_create.c:312
#5  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7ffff2499700 (LWP 3466)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff75f5bf7 in g_cond_wait (cond=cond@entry=0x7fffdc1d82f8, mutex=mutex@entry=0x7fffdc1d82d0)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread-posix.c:762
#2  0x00007ffff45413c5 in gst_queue_chain_buffer_or_list (parent=0x7fffdc1d8050, obj=0x7fffdc234df0, is_list=0, pad=<optimized out>)
    at gstqueue.c:1200
#3  0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fffe8020d90) at gstpad.c:3977
#4  gst_pad_push_data (pad=pad@entry=0x7fbb50, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#5  0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7fbb50, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#6  0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234df0) at gstghostpad.c:126
#7  0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7eb400) at gstpad.c:3977
#8  gst_pad_push_data (pad=pad@entry=0x7eb8c0, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
---Type <return> to continue, or q <return> to quit---
#9  0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7eb8c0, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#10 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234df0) at gstghostpad.c:126
#11 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=<optimized out>, pad=0x7fffdc21a040) at gstpad.c:3977
#12 gst_pad_push_data (pad=0x7fffdc211470, type=<optimized out>, data=0x7fffdc234df0) at gstpad.c:4210
#13 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fffdc211240) at gstpad.c:3977
#14 gst_pad_push_data (pad=0x7fffdc211010, type=type@entry=4112, data=0x7fffdc234df0) at gstpad.c:4210
#15 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4321
#16 0x00007ffff4c3bba9 in gst_base_transform_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstbasetransform.c:2281
#17 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fffdc210de0) at gstpad.c:3977
#18 gst_pad_push_data (pad=pad@entry=0x7fbd90, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#19 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7fbd90, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#20 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234df0) at gstghostpad.c:126
#21 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7eb660) at gstpad.c:3977
#22 gst_pad_push_data (pad=pad@entry=0x7fffdc210bb0, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#23 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7fffdc210bb0, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#24 0x00007ffff57c3d1d in gst_stream_synchronizer_sink_chain (pad=0x7fffdc210980, parent=<optimized out>, buffer=0x7fffdc234df0)
    at gststreamsynchronizer.c:638
#25 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fffdc210980) at gstpad.c:3977
#26 gst_pad_push_data (pad=pad@entry=0x7fb490, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#27 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7fb490, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#28 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234df0) at gstghostpad.c:126
#29 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7eace0) at gstpad.c:3977
#30 gst_pad_push_data (pad=0x7fffe8020b60, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#31 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#32 0x00007ffff45367d0 in gst_selector_pad_chain (pad=0x7fffdc1d2030, parent=<optimized out>, buf=0x7fffdc234df0) at gstinputselector.c:1098
#33 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fffdc1d2030) at gstpad.c:3977
#34 gst_pad_push_data (pad=pad@entry=0x7eaa80, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#35 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7eaa80, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#36 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234df0) at gstghostpad.c:126
#37 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fb250) at gstpad.c:3977
#38 gst_pad_push_data (pad=pad@entry=0x7fffec024090, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#39 0x00007ffff7b34d86 in gst_pad_push (pad=pad@entry=0x7fffec024090, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#40 0x00007ffff7b1eb9b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234df0) at gstghostpad.c:126
#41 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234df0, type=4112, pad=0x7fa950) at gstpad.c:3977
---Type <return> to continue, or q <return> to quit---
#42 gst_pad_push_data (pad=0x7fffe8020930, type=type@entry=4112, data=data@entry=0x7fffdc234df0) at gstpad.c:4210
#43 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7fffdc234df0) at gstpad.c:4321
#44 0x00007ffff50c894f in gst_video_decoder_clip_and_push_buf (decoder=decoder@entry=0x7fffdc04f4e0, buf=buf@entry=0x7fffdc234df0)
    at gstvideodecoder.c:2890
#45 0x00007ffff50cf308 in gst_video_decoder_finish_frame (decoder=0x7fffdc04f4e0, frame=0x0, frame@entry=0x7fffdc234240) at gstvideodecoder.c:2792
#46 0x00007fffe30383e2 in gst_ffmpegviddec_video_frame (ffmpegdec=ffmpegdec@entry=0x7fffdc04f4e0, data=<optimized out>, 
    data@entry=0x7fffdc2b7ee0 "", size=size@entry=6386, have_data=have_data@entry=0x7ffff2498548, frame=0x7fffdc2afb50, 
    ret=ret@entry=0x7ffff249854c) at gstavviddec.c:1365
#47 0x00007fffe30387c6 in gst_ffmpegviddec_frame (ffmpegdec=ffmpegdec@entry=0x7fffdc04f4e0, data=data@entry=0x7fffdc2b7ee0 "", 
    size=size@entry=6386, have_data=have_data@entry=0x7ffff2498548, frame=frame@entry=0x7fffdc2afb50, ret=ret@entry=0x7ffff249854c)
    at gstavviddec.c:1422
#48 0x00007fffe3038e0c in gst_ffmpegviddec_handle_frame (decoder=0x7fffdc04f4e0, frame=0x7fffdc2afb50) at gstavviddec.c:1534
#49 0x00007ffff50c7e99 in gst_video_decoder_decode_frame (decoder=decoder@entry=0x7fffdc04f4e0, frame=0x7fffdc2afb50) at gstvideodecoder.c:3092
#50 0x00007ffff50caa13 in gst_video_decoder_chain_forward (decoder=decoder@entry=0x7fffdc04f4e0, buf=buf@entry=0x7fffdc234350, 
    at_eos=at_eos@entry=0) at gstvideodecoder.c:1963
#51 0x00007ffff50cc560 in gst_video_decoder_chain (pad=<optimized out>, parent=<optimized out>, buf=0x7fffdc234350) at gstvideodecoder.c:2265
#52 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234350, type=4112, pad=0x7fffe8020700) at gstpad.c:3977
#53 gst_pad_push_data (pad=0x7fffe8020070, type=type@entry=4112, data=0x7fffdc234350) at gstpad.c:4210
#54 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4321
#55 0x00007ffff4c3bba9 in gst_base_transform_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstbasetransform.c:2281
#56 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234350, type=4112, pad=0x7f1cb0) at gstpad.c:3977
#57 gst_pad_push_data (pad=0x7f1a80, type=type@entry=4112, data=data@entry=0x7fffdc234350) at gstpad.c:4210
#58 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7fffdc234350) at gstpad.c:4321
#59 0x00007ffff4c1c521 in gst_base_parse_push_frame (parse=parse@entry=0x7fffe801e7a0, frame=frame@entry=0x7ffff2498bb0) at gstbaseparse.c:2341
#60 0x00007ffff4c1d69b in gst_base_parse_chain (pad=<optimized out>, parent=<optimized out>, buffer=0x7fffdc234350) at gstbaseparse.c:2950
#61 0x00007ffff7b2d538 in gst_pad_chain_data_unchecked (data=0x7fffdc234350, type=4112, pad=0x7f1850) at gstpad.c:3977
#62 gst_pad_push_data (pad=0x7f1620, type=type@entry=4112, data=data@entry=0x7fffdc234350) at gstpad.c:4210
#63 0x00007ffff7b34d86 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7fffdc234350) at gstpad.c:4321
#64 0x00007ffff453c8f3 in gst_single_queue_push_one (allow_drop=<synthetic pointer>, object=0x7fffdc234350, sq=0x7fffe8016cc0, mq=0x7fffe8017070)
    at gstmultiqueue.c:1238
#65 gst_multi_queue_loop (pad=<optimized out>) at gstmultiqueue.c:1516
#66 0x00007ffff7b5c331 in gst_task_func (task=0x7fdb90) at gsttask.c:331
#67 0x00007ffff75d988c in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:307
#68 0x00007ffff75d8f05 in g_thread_proxy (data=0x7fffe8013ca0) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
---Type <return> to continue, or q <return> to quit---
#69 0x00007ffff7355182 in start_thread (arg=0x7ffff2499700) at pthread_create.c:312
#70 0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7ffff2c9a700 (LWP 3465)):
#0  g_logv (log_domain=0x7ffff7b81cb5 <g_log_domain_gstreamer> "GStreamer", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, 
    args=args@entry=0x7ffff2c99a08) at /build/buildd/glib2.0-2.40.2/./glib/gmessages.c:1038
#1  0x00007ffff75bad72 in g_log (log_domain=<optimized out>, log_level=log_level@entry=G_LOG_LEVEL_CRITICAL, 
    format=format@entry=0x7ffff760274a "%s: assertion '%s' failed") at /build/buildd/glib2.0-2.40.2/./glib/gmessages.c:1071
#2  0x00007ffff75bad99 in g_return_if_fail_warning (log_domain=<optimized out>, 
    pretty_function=pretty_function@entry=0x7ffff7b9f3a0 <__func__.19013> "gst_tag_list_insert", 
    expression=expression@entry=0x7ffff7b9dbc6 "GST_IS_TAG_LIST (into)") at /build/buildd/glib2.0-2.40.2/./glib/gmessages.c:1080
#3  0x00007ffff7b591ea in gst_tag_list_insert (into=0x0, from=<optimized out>, mode=mode@entry=GST_TAG_MERGE_REPLACE) at gsttaglist.c:1120
#4  0x00007ffff30eccc6 in gst_matroska_read_common_parse_metadata_id_tag (p_taglist=<synthetic pointer>, ebml=0x7ffff2c99ca0, common=0x7e4f28)
    at matroska-read-common.c:2405
#5  gst_matroska_read_common_parse_metadata (common=common@entry=0x7e4f28, el=el@entry=0x7e4e20, ebml=ebml@entry=0x7ffff2c99ca0)
    at matroska-read-common.c:2472
#6  0x00007ffff30d0c27 in gst_matroska_demux_parse_id (demux=demux@entry=0x7e4e20, id=307544935, length=91, needed=<optimized out>)
    at matroska-demux.c:4295
#7  0x00007ffff30d560f in gst_matroska_demux_loop (pad=<optimized out>) at matroska-demux.c:4449
#8  0x00007ffff7b5c331 in gst_task_func (task=0x7fd5f0) at gsttask.c:331
#9  0x00007ffff75d988c in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:307
#10 0x00007ffff75d8f05 in g_thread_proxy (data=0x7fffec103ca0) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#11 0x00007ffff7355182 in start_thread (arg=0x7ffff2c9a700) at pthread_create.c:312
#12 0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7ffff3d15700 (LWP 3464)):
#0  0x00007ffff707512d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff75b3fe4 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fffe40008c0, timeout=-1, context=0x7fcad0)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:4028
#2  g_main_context_iterate (context=context@entry=0x7fcad0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3729
#3  0x00007ffff75b40ec in g_main_context_iteration (context=0x7fcad0, may_block=may_block@entry=1)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3795
#4  0x00007ffff75b4129 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:5541
---Type <return> to continue, or q <return> to quit---
#5  0x00007ffff75d8f05 in g_thread_proxy (data=0x7e28f0) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#6  0x00007ffff7355182 in start_thread (arg=0x7ffff3d15700) at pthread_create.c:312
#7  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7ffff4516700 (LWP 3463)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff75f5bf7 in g_cond_wait (cond=cond@entry=0x7fd0b0, mutex=mutex@entry=0x7fd068)
    at /build/buildd/glib2.0-2.40.2/./glib/gthread-posix.c:762
#2  0x00007ffff7b5c50b in gst_task_func (task=0x7fd050) at gsttask.c:316
#3  0x00007ffff75d988c in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:307
#4  0x00007ffff75d8f05 in g_thread_proxy (data=0x7e28a0) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#5  0x00007ffff7355182 in start_thread (arg=0x7ffff4516700) at pthread_create.c:312
#6  0x00007ffff708247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7ffff7fc8740 (LWP 3459)):
#0  0x00007ffff707512d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff75b3fe4 in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7fe0f0, timeout=-1, context=0x7fcdd0)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:4028
#2  g_main_context_iterate (context=0x7fcdd0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3729
#3  0x00007ffff75b430a in g_main_loop_run (loop=0x6326e0) at /build/buildd/glib2.0-2.40.2/./glib/gmain.c:3928
#4  0x00007ffff7b03484 in gst_bus_poll (bus=bus@entry=0x67e2e0, events=events@entry=GST_MESSAGE_ANY, timeout=<optimized out>) at gstbus.c:1142
#5  0x0000000000404838 in event_loop (pipeline=0x7de610, blocking=blocking@entry=1, do_progress=do_progress@entry=0, 
    target_state=target_state@entry=GST_STATE_PLAYING) at gst-launch.c:531
#6  0x000000000040397a in main (argc=3, argv=0x7fffffffb7c8) at gst-launch.c:1121
(gdb) 
