Example throws GLib-GObject-CRITICAL and GLib-GObject-WARNING

[SpeCT]

Hi José Antonio.

Firstly I want to thank you for such future looking plugin. Great job 👍

Secondary I want to ask for help with running example server.
I've successfully built the plugin and example server from your google code repo. It can run, it can respond with html, but it logs critical errors when I'm allowing Chrome to use my camera (when it is trying to start the pipeline I suppose).

Here is what I did.

1. VirtualBox + fresh Debian 7.1 (i386 netinstall w/o GUI)
2. installed stable versions of ssh git sudo build-essential autoconf libtool pkg-config
3. installed unstable versions of libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libsrtp0-dev libnice-dev libsoup2.4-dev
4. cloned your git repo from google-code
5. ./autogen.sh; make; make install
6. Moved produced .so and .la files from /usr/local/lib/gstreamer-1.0 to /usr/lib/i386-linux-gnu/gstreamer-1.0 (the place, where I've found gst core plugins installed)
7. cd test/examples; ./webrtc_http_server

Here is what server logs to console, when I'm trying to re-stream myself:

~/kurento.gst-plugins-webrtc/test/examples# ./webrtc_http_server
testing rand_source...passed
cipher: aes cipher block chaining (cbc) mode
  instance count: 0
  self-test: passed
cipher: aes integer counter mode
  instance count: 2
  self-test: passed
cipher: null cipher
  instance count: 0
  self-test: passed
auth func: hmac sha-1 authentication function
  instance count: 2
  self-test: passed
auth func: null authentication function
  instance count: 0
  self-test: passed
debug modules loaded:
  srtp (off)
  hmac sha-1 (off)
  aes cbc (off)
  aes icm (off)
  alloc (off)
  stat test (off)
  cipher (off)
  auth func (off)
  crypto kernel (off)

(webrtc_http_server:8705): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed

(webrtc_http_server:8705): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(webrtc_http_server:8705): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(webrtc_http_server:8705): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(webrtc_http_server:8705): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(webrtc_http_server:8705): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed

I've tried to read the sources, but understood, that without any experience in C[++] development for Linux it is almost impossible for me to find out where and why it fails :(

Please let me know If there are any tools or cli arguments for creating more verbose debug information.

[jcaden]

Hi Yury,

It seems that your are missing some plugins in gstreamer, try installing all plugins in gst-plugins-bad gst-plugins-good, etc.

Additionally to enable debug information you can use the environment variable GST_DEBUG=webrtc:5,3
This way you may receive more information about the error.

[SpeCT]

Hi José Antonio.

Thanks for fast reply. Before I felt asleep, I've discovered --help, --help-all and then --gst-debug-level flags. As you said before, the problem was in missing rtpbin element (from gst-plugins-good collection). Now it is installed (as well as libnice-dev and gstreamer1.0-nice) and the entire pipeline can be built. But another issue prevents me from seeing myself in Chrome – now the testing server crashes with next errors:

*... blah-blah-blah ... self-testing ... *
0:00:10.420070701  2824  0x856f5b0 FIXME                default gstutils.c:3622:gst_pad_create_stream_id_printf_valist:<nicesrc:src> Creating random stream-id, consider implementing a deterministic way of creating a stream-id
0:00:10.460809980  2824  0x856f5b0 WARN           srtpunprotect gstsrtpunprotect.c:238:gst_srtp_unprotect_chain: Invalid buffer
0:00:10.484024897  2824 0xb5801cc0 WARN                basesink gstbasesink.c:3141:gst_base_sink_chain_unlocked:<nicesink> warning: Internal data flow problem.
0:00:10.484433670  2824 0xb5801cc0 WARN                basesink gstbasesink.c:3141:gst_base_sink_chain_unlocked:<nicesink> warning: Received buffer without a new-segment. Assuming timestamps start from 0.
0:00:10.485167468  2824  0x8534900 WARN      webrtc_http_server webrtc_http_server.c:67:bus_msg:<pipeline0> Warning: warning message from element 'nicesink': GstMessageWarning, gerror=(GError)NULL, debug=(string)"gstbasesink.c\(3141\):\ gst_base_sink_chain_unlocked\ \(\):\ /GstPipeline:pipeline0/GstWebrtcBin:webrtcbin0/GstNiceSink:nicesink:\012Received\ buffer\ without\ a\ new-segment.\ Assuming\ timestamps\ start\ from\ 0.";
0:00:10.488098868  2824  0x8590920 WARN                     bin gstbin.c:2040:gst_bin_sort_iterator_next:<pipeline0> loop dected in graph

(webrtc_http_server:2824): GStreamer-WARNING **: loop detected in the graph of bin 'pipeline0'!!
**
ERROR:webrtc_http_server.c:310:rtpbin_pad_added: assertion failed: (depay != NULL)
Aborted

The entire debug log (using --gst-debug-level=5) can be found in this gist.