#0  0x00007f5059b5c1c6 in gst_mini_object_replace (olddata=olddata@entry=0x40, newdata=0x0) at gstminiobject.c:497
  492: 
  493:   GST_CAT_TRACE (GST_CAT_REFCOUNTING, "replace %p (%d) with %p (%d)",
  494:       *olddata, *olddata ? (*olddata)->refcount : 0,
  495:       newdata, newdata ? newdata->refcount : 0);
  496: 
  497:   olddata_val = g_atomic_pointer_get ((gpointer *) olddata);
  498: 
  499:   if (G_UNLIKELY (olddata_val == newdata))
  500:     return FALSE;
  501: 
  502:   if (newdata)
#1  0x00007f5041911ba0 in gst_buffer_replace (nbuf=<optimized out>, obuf=0x40) at /usr/include/gstreamer-1.0/gst/gstbuffer.h:475
  [Error: /usr/include/gstreamer-1.0/gst/gstbuffer.h was not found in source tree]
#2  gst_ffmpegviddec_video_frame (ffmpegdec=ffmpegdec@entry=0x7f5030067710, data=<optimized out>, data@entry=0x7f50301b2730 "", size=<optimized out>, frame=frame@entry=0x7f5038094030, ret=ret@entry=0x7f504319631c) at gstavviddec.c:1229
  [Error: gstavviddec.c was not found in source tree]
#3  0x00007f5041912818 in gst_ffmpegviddec_frame (ffmpegdec=ffmpegdec@entry=0x7f5030067710, data=data@entry=0x7f50301b2730 "", size=size@entry=11080, got_data=got_data@entry=0x7f5043196318, frame=frame@entry=0x7f5038094030, ret=ret@entry=0x7f504319631c) at gstavviddec.c:1371
  [Error: gstavviddec.c was not found in source tree]
#4  0x00007f5041912eac in gst_ffmpegviddec_handle_frame (decoder=0x7f5030067710, frame=0x7f5038094030) at gstavviddec.c:1491
  [Error: gstavviddec.c was not found in source tree]
#5  0x00007f5049621a09 in gst_video_decoder_decode_frame (decoder=decoder@entry=0x7f5030067710, frame=0x7f5038094030) at gstvideodecoder.c:2832
  [Error: gstvideodecoder.c was not found in source tree]
#6  0x00007f5049621d6d in gst_video_decoder_chain_forward (decoder=decoder@entry=0x7f5030067710, buf=buf@entry=0x7f505d1ec620, at_eos=at_eos@entry=0) at gstvideodecoder.c:1757
  [Error: gstvideodecoder.c was not found in source tree]
#7  0x00007f5049623f6d in gst_video_decoder_chain (pad=<optimized out>, parent=0x7f5030067710, buf=0x7f505d1ec620) at gstvideodecoder.c:2037
  [Error: gstvideodecoder.c was not found in source tree]
#8  0x00007f5059b5fce8 in gst_pad_chain_data_unchecked (data=0x7f505d1ec620, type=<optimized out>, pad=0x7f5030068080) at gstpad.c:3760
  3755: 
  3756:     GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
  3757:         "calling chainfunction &%s with buffer %" GST_PTR_FORMAT,
  3758:         GST_DEBUG_FUNCPTR_NAME (chainfunc), GST_BUFFER (data));
  3759: 
  3760:     ret = chainfunc (pad, parent, GST_BUFFER_CAST (data));
  3761: 
  3762:     GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
  3763:         "called chainfunction &%s with buffer %p, returned %s",
  3764:         GST_DEBUG_FUNCPTR_NAME (chainfunc), data, gst_flow_get_name (ret));
  3765:   } else {
#9  gst_pad_push_data (pad=0x7f50380168e0, type=type@entry=4112, data=<optimized out>) at gstpad.c:3990
  3985:   /* take ref to peer pad before releasing the lock */
  3986:   gst_object_ref (peer);
  3987:   pad->priv->using++;
  3988:   GST_OBJECT_UNLOCK (pad);
  3989: 
  3990:   ret = gst_pad_chain_data_unchecked (peer, type, data);
  3991: 
  3992:   gst_object_unref (peer);
  3993: 
  3994:   GST_OBJECT_LOCK (pad);
  3995:   pad->priv->using--;
#10 0x00007f5059b66996 in gst_pad_push (pad=<optimized out>, buffer=<optimized out>) at gstpad.c:4093
  4088: {
  4089:   g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
  4090:   g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
  4091:   g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
  4092: 
  4093:   return gst_pad_push_data (pad,
  4094:       GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
  4095: }
  4096: 
  4097: /**
  4098:  * gst_pad_push_list:
#11 0x00007f5053ebb299 in gst_base_transform_chain (pad=<optimized out>, parent=0x7f5038026130, buffer=<optimized out>) at gstbasetransform.c:2237
  2232:         }
  2233:         priv->discont = FALSE;
  2234:       }
  2235:       priv->processed++;
  2236: 
  2237:       ret = gst_pad_push (trans->srcpad, outbuf);
  2238:     } else {
  2239:       GST_DEBUG_OBJECT (trans, "we got return %s", gst_flow_get_name (ret));
  2240:       gst_buffer_unref (outbuf);
  2241:     }
  2242:   }
#12 0x00007f5059b5fce8 in gst_pad_chain_data_unchecked (data=0x7f505d1ec620, type=<optimized out>, pad=0x7f50380166b0) at gstpad.c:3760
  3755: 
  3756:     GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
  3757:         "calling chainfunction &%s with buffer %" GST_PTR_FORMAT,
  3758:         GST_DEBUG_FUNCPTR_NAME (chainfunc), GST_BUFFER (data));
  3759: 
  3760:     ret = chainfunc (pad, parent, GST_BUFFER_CAST (data));
  3761: 
  3762:     GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
  3763:         "called chainfunction &%s with buffer %p, returned %s",
  3764:         GST_DEBUG_FUNCPTR_NAME (chainfunc), data, gst_flow_get_name (ret));
  3765:   } else {
#13 gst_pad_push_data (pad=0x7f5038016480, type=type@entry=4112, data=<optimized out>, data@entry=0x7f505d1ec620) at gstpad.c:3990
  3985:   /* take ref to peer pad before releasing the lock */
  3986:   gst_object_ref (peer);
  3987:   pad->priv->using++;
  3988:   GST_OBJECT_UNLOCK (pad);
  3989: 
  3990:   ret = gst_pad_chain_data_unchecked (peer, type, data);
  3991: 
  3992:   gst_object_unref (peer);
  3993: 
  3994:   GST_OBJECT_LOCK (pad);
  3995:   pad->priv->using--;
#14 0x00007f5059b66996 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7f505d1ec620) at gstpad.c:4093
  4088: {
  4089:   g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
  4090:   g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
  4091:   g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
  4092: 
  4093:   return gst_pad_push_data (pad,
  4094:       GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
  4095: }
  4096: 
  4097: /**
  4098:  * gst_pad_push_list:
#15 0x00007f5053e9db09 in gst_base_parse_push_frame (parse=parse@entry=0x7f503801feb0, frame=frame@entry=0x7f5043196970) at gstbaseparse.c:2299
  2294:     ret = GST_FLOW_OK;
  2295:   } else if (ret == GST_FLOW_OK) {
  2296:     if (parse->segment.rate > 0.0) {
  2297:       GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
  2298:           size);
  2299:       ret = gst_pad_push (parse->srcpad, buffer);
  2300:       GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
  2301:     } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
  2302: 
  2303:       /* in backwards playback mode, if on passthrough we need to push buffers
  2304:        * directly without accumulating them into the buffers_queued as baseparse
#16 0x00007f5053e9e510 in gst_base_parse_chain (pad=<optimized out>, parent=0x7f503801feb0, buffer=0x7f505d1ec620) at gstbaseparse.c:2805
  2800:             && parse->priv->passthrough)) {
  2801:       GstBaseParseFrame frame;
  2802: 
  2803:       gst_base_parse_frame_init (&frame);
  2804:       frame.buffer = gst_buffer_make_writable (buffer);
  2805:       ret = gst_base_parse_push_frame (parse, &frame);
  2806:       gst_base_parse_frame_free (&frame);
  2807:       return ret;
  2808:     }
  2809:     /* upstream feeding us in reverse playback;
  2810:      * finish previous fragment and start new upon DISCONT */
#17 0x00007f5059b5fce8 in gst_pad_chain_data_unchecked (data=0x7f505d1ec620, type=<optimized out>, pad=0x7f5038016250) at gstpad.c:3760
  3755: 
  3756:     GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
  3757:         "calling chainfunction &%s with buffer %" GST_PTR_FORMAT,
  3758:         GST_DEBUG_FUNCPTR_NAME (chainfunc), GST_BUFFER (data));
  3759: 
  3760:     ret = chainfunc (pad, parent, GST_BUFFER_CAST (data));
  3761: 
  3762:     GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
  3763:         "called chainfunction &%s with buffer %p, returned %s",
  3764:         GST_DEBUG_FUNCPTR_NAME (chainfunc), data, gst_flow_get_name (ret));
  3765:   } else {
#18 gst_pad_push_data (pad=0x7f5038016020, type=type@entry=4112, data=<optimized out>, data@entry=0x7f505d1ec620) at gstpad.c:3990
  3985:   /* take ref to peer pad before releasing the lock */
  3986:   gst_object_ref (peer);
  3987:   pad->priv->using++;
  3988:   GST_OBJECT_UNLOCK (pad);
  3989: 
  3990:   ret = gst_pad_chain_data_unchecked (peer, type, data);
  3991: 
  3992:   gst_object_unref (peer);
  3993: 
  3994:   GST_OBJECT_LOCK (pad);
  3995:   pad->priv->using--;
#19 0x00007f5059b66996 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7f505d1ec620) at gstpad.c:4093
  4088: {
  4089:   g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
  4090:   g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
  4091:   g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
  4092: 
  4093:   return gst_pad_push_data (pad,
  4094:       GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
  4095: }
  4096: 
  4097: /**
  4098:  * gst_pad_push_list:
#20 0x00007f504915ca23 in gst_single_queue_push_one (object=0x7f505d1ec620, sq=0x7f50380199b0, mq=0x7f503801a070) at gstmultiqueue.c:1089
  1084: 
  1085:     GST_DEBUG_OBJECT (mq,
  1086:         "SingleQueue %d : Pushing buffer %p with ts %" GST_TIME_FORMAT,
  1087:         sq->id, buffer, GST_TIME_ARGS (timestamp));
  1088: 
  1089:     result = gst_pad_push (sq->srcpad, buffer);
  1090:   } else if (GST_IS_EVENT (object)) {
  1091:     GstEvent *event;
  1092: 
  1093:     event = GST_EVENT_CAST (object);
  1094: 
#21 gst_multi_queue_loop (pad=<optimized out>) at gstmultiqueue.c:1338
  1333:     }
  1334:   }
  1335:   GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
  1336: 
  1337:   /* Try to push out the new object */
  1338:   result = gst_single_queue_push_one (mq, sq, object);
  1339:   object = NULL;
  1340: 
  1341:   /* Check if we pushed something already and if this is
  1342:    * now a switch from an active to a non-active stream.
  1343:    *
#22 0x00007f5059b8d4e9 in gst_task_func (task=0x7f505d35cb90) at gsttask.c:316
  311:         }
  312:       }
  313:       GST_OBJECT_UNLOCK (task);
  314:     }
  315: 
  316:     task->func (task->user_data);
  317:   }
  318: done:
  319:   g_rec_mutex_unlock (lock);
  320: 
  321:   GST_OBJECT_LOCK (task);
#23 0x00007f505961489c in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.39.91/./glib/gthreadpool.c:307
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gthreadpool.c was not found in source tree]
#24 0x00007f5059613f15 in g_thread_proxy (data=0x7f5038013c50) at /build/buildd/glib2.0-2.39.91/./glib/gthread.c:764
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gthread.c was not found in source tree]
#25 0x00007f505908a182 in start_thread (arg=0x7f5043197700) at pthread_create.c:312
  [Error: pthread_create.c was not found in source tree]
#26 0x00007f5058db712d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
  [Error: ../sysdeps/unix/sysv/linux/x86_64/clone.S was not found in source tree]