sender@sender-VirtualBox:~$ gdb --args gst-launch-1.0 udpsrc uri=udp://192.168.56.101:5000 caps='application/x-rtp, media=(string)video, clock-rate=90000' ! rtpmp2tdepay ! tsdemux ! h264parse ! avdec_h264 ! videoconvert ! schroenc bitrate=512 ! mpegtsmux ! rtpmp2tpay pt=33 ! udpsink host=192.168.56.102 port=4000
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /usr/bin/gst-launch-1.0...Reading symbols from /usr/lib/debug/.build-id/36/412de3fcdcafc3287a71383247006c4b768383.debug...done.
done.
(gdb) run
Starting program: /usr/bin/gst-launch-1.0 udpsrc uri=udp://192.168.56.101:5000 caps=application/x-rtp,\ media=\(string\)video,\ clock-rate=90000 \! rtpmp2tdepay \! tsdemux \! h264parse \! avdec_h264 \! videoconvert \! schroenc bitrate=512 \! mpegtsmux \! rtpmp2tpay pt=33 \! udpsink host=192.168.56.102 port=4000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffefd4f700 (LWP 9835)]
Setting pipeline to PAUSED ...
[New Thread 0x7fffef54e700 (LWP 9836)]
Pipeline is live and does not need PREROLL ...
[New Thread 0x7fffeed4d700 (LWP 9837)]
Setting pipeline to PLAYING ...
New clock: GstSystemClock
[Thread 0x7fffefd4f700 (LWP 9835) exited]

(gst-launch-1.0:9832): GStreamer-CRITICAL **: _gst_util_uint64_scale: assertion `denom != 0' failed

** (gst-launch-1.0:9832): CRITICAL **: gst_video_encoder_set_latency: assertion `GST_CLOCK_TIME_IS_VALID (min_latency)' failed
[New Thread 0x7fffefd4f700 (LWP 9838)]
[New Thread 0x7fffee012700 (LWP 9839)]
[New Thread 0x7fffed811700 (LWP 9840)]
[New Thread 0x7fffed010700 (LWP 9841)]
[New Thread 0x7fffc6a80700 (LWP 9842)]
[Thread 0x7fffc6a80700 (LWP 9842) exited]
thread apply all
^C
Program received signal SIGINT, Interrupt.
0x00007ffff70a2a43 in poll () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) thread apply all bt

Thread 8 (Thread 0x7fffed010700 (LWP 9841)):
#0  0x00007ffff7385d84 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff0c62dd4 in ?? () from /usr/lib/libschroedinger-1.0.so.0
#2  0x00007ffff7381e9a in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007ffff70ae3fd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fffed811700 (LWP 9840)):
#0  0x00007ffff7385d84 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff0c62dd4 in ?? () from /usr/lib/libschroedinger-1.0.so.0
#2  0x00007ffff7381e9a in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007ffff70ae3fd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fffee012700 (LWP 9839)):
#0  0x00007ffff7385d84 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff0c62dd4 in ?? () from /usr/lib/libschroedinger-1.0.so.0
---Type <return> to continue, or q <return> to quit---
#2  0x00007ffff7381e9a in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007ffff70ae3fd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fffefd4f700 (LWP 9838)):
#0  0x00007ffff7385d84 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff0c62dd4 in ?? () from /usr/lib/libschroedinger-1.0.so.0
#2  0x00007ffff7381e9a in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007ffff70ae3fd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fffeed4d700 (LWP 9837)):
#0  0x00007ffff70a2a43 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff75deff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff75df124 in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff75df171 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffff76009b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffff7381e9a in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
---Type <return> to continue, or q <return> to quit---