Debugging gstreamer-related issue

Chuck Crisler ccrisler at mutualink.net
Tue Jan 15 07:26:26 PST 2013 

Here is a start.

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstInfo.html

Basically you need to export GST_DEBUG with some parameters. For starters,
use export GST_DEBUG=*.3

That will get you started and you will see what is loaded. Then you should
re-define GST_DEBUG at level 5 but with only those plug-ins that are
interesting. There will be a lot that aren't interesting and you want to
get rid of them.

It seems to me that your bad plugins are too old for mpegtsdemux. Are you
sure that your versions are correct and the plugin name is correct? The
MP2T demux plugin was re-named around then. You might just want to load
later versions of the code - they do work better and did fix a lot of bugs.
Updating could prevent a lot of grief.


On Tue, Jan 8, 2013 at 5:44 PM, Florian Echtler <floe at butterbrot.org> wrote:

> Hello everyone,
>
> I'm using Ubuntu 12.04 and would like to use gnome-dvb-daemon to watch
> digital broadcast TV with totem. Recording works, and when I select a
> channel in totem, the "Lock" LED on the tuner lights up after a few
> seconds. However, I'm getting just a black picture, and judging by the
> debug output, it's a gstreamer-related issue (see below) - I'd say the
> mpegtsdemux plugin is to blame...
>
> My package versions are:
>
> gstreamer0.10-plugins-bad     0.10.22.3-2ubuntu2.1
> gstreamer0.10-plugins-base    0.10.36-1ubuntu0.1
> gstreamer0.10-plugins-good    0.10.31-1ubuntu1
> gstreamer0.10-plugins-ugly    0.10.18.3-1ubuntu1
>
> Unfortunately, I haven't been able to find any related bug report; it may
> well be that some Ubuntu patch is to blame. I'd like to track this bug
> down, but I'm currently at a bit of a loss where to start.
>
> So, two questions: does anybody happen to have an idea what the reason for
> this bug is? And if not, can someone give me some pointers how to start
> debugging this?
>
> And here's the debug output:
>
> ------------------------------**------------------------------**
> -----------
> $ totem --gst-debug-level=2
> 0:00:13.236788430  8155 0xb939b460 WARN         rtpjitterbuffer
> rtpjitterbuffer.c:458:**calculate_skew: delta - skew: 0:00:01.004277222
> too big, reset skew
> 0:00:14.245935817  8155 0xb939b460 WARN         rtpjitterbuffer
> rtpjitterbuffer.c:458:**calculate_skew: delta - skew: 0:00:01.009167781
> too big, reset skew
> 0:00:14.251067057  8155 0xb391c860 WARN                 default
> descriptions.c:988:gst_pb_**utils_get_codec_description: No description
> available for media type: application/x-mpegts-private-**section
> 0:00:14.251205133  8155 0xb391c860 WARN            uridecodebin
> gsturidecodebin.c:874:unknown_**type_cb:<uridecodebin0> warning: No
> decoder available for type 'application/x-mpegts-private-**section'.
> 0:00:14.251263241  8155 0xb91e6100 WARN                   totem
> bacon-video-widget-gst-0.10.c:**2196:bvw_bus_message_cb: Warning message:
> warning message from element 'uridecodebin0': GstMessageWarning,
> gerror=(GError)NULL, debug=(string)"**gsturidecodebin.c\(874\):\
> unknown_type_cb\ \(\):\ /GstPlayBin2:play/**GstURIDecodeBin:uridecodebin0"
> **;
> 0:00:14.251977856  8155 0xb391c860 WARN                 default
> descriptions.c:988:gst_pb_**utils_get_codec_description: No description
> available for media type: private/teletext
> 0:00:14.252085202  8155 0xb391c860 WARN            uridecodebin
> gsturidecodebin.c:874:unknown_**type_cb:<uridecodebin0> warning: No
> decoder available for type 'private/teletext'.
> 0:00:14.252135837  8155 0xb91e6100 WARN                   totem
> bacon-video-widget-gst-0.10.c:**2196:bvw_bus_message_cb: Warning message:
> warning message from element 'uridecodebin0': GstMessageWarning,
> gerror=(GError)NULL, debug=(string)"**gsturidecodebin.c\(874\):\
> unknown_type_cb\ \(\):\ /GstPlayBin2:play/**GstURIDecodeBin:uridecodebin0"
> **;
> 0:00:14.257291449  8155 0xa9d3a090 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:14.258974066  8155 0xa9d3a090 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:14.259070238  8155 0xa9d3a090 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:14.259767673  8155 0xa9d3a090 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:14.260856081  8155 0xa9d3a180 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:14.261391205  8155 0xa9d3a090 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:14.284157715  8155 0xa9d3a180 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> 0:00:15.257781251  8155 0xb939b460 WARN         rtpjitterbuffer
> rtpjitterbuffer.c:458:**calculate_skew: delta - skew: 0:00:01.011821129
> too big, reset skew
> 0:00:16.273755204  8155 0xb939b460 WARN         rtpjitterbuffer
> rtpjitterbuffer.c:458:**calculate_skew: delta - skew: 0:00:01.015965991
> too big, reset skew
> 0:00:17.145391605  8155 0xb91e6100 WARN                   totem
> bacon-video-widget-gst-0.10.c:**1697:bvw_handle_element_**message:
> Unhandled element message application/x-rtp-source-sdes from rtpsession0:
> element message from element 'rtpsession0': application/x-rtp-source-sdes,
> cname=(string)"user3608340773\**@host-f00948b8", tool=(string)GStreamer;
> 0:00:17.278950207  8155 0xb939b460 WARN         rtpjitterbuffer
> rtpjitterbuffer.c:458:**calculate_skew: delta - skew: 0:00:01.005204013
> too big, reset skew
> 0:00:17.621670611  8155 0xa9d3a180 WARN             mpegtsdemux
> gstmpegtsdemux.c:3104:gst_**mpegts_demux_src_pad_query:<**mpegtsdemux0>
> unsupported query format or no bitrate yet to approximate duration from
> bytes
> ------------------------------**------------------------------**
> -----------
>
> Thanks!
> Florian
> --
> SENT FROM MY DEC VT50 TERMINAL
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