[Bug 645467] New: dvbsrc/dvbbasebin makes uridecodebin error with confusing 'No URI handler implemented for "dvb"' if dvb-channels.conf is bad

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=645467
  GStreamer | gst-plugins-bad | git

           Summary: dvbsrc/dvbbasebin makes uridecodebin error with
                    confusing 'No URI handler implemented for "dvb"' if
                    dvb-channels.conf is bad
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: leio at gentoo.org
         QAContact: gstreamer-bugs at lists.freedesktop.org
      GNOME target: ---
     GNOME version: ---


If the $HOME/.gstreamer-0.10/dvb-channels.conf is in an unsuitable format for
parse_channels_conf_from_file (), then the end result is a very confusing error
message for users:

ERROR: from element /GstURIDecodeBin:uridecodebin0: No URI handler implemented
for "dvb".
While gst-inspect dvbbasebin shows an URI handler:
  Supported URI protocols:
    dvb
(but many users who know gst-inspect may look into dvbsrc element instead like
I did initially, which isn't a uri handler).

Hopefully it could propagate and present a better error message in this case.
Noticed this because a w_scan upgrade seemed to start generating a different
format file now from old totem pre-gnome-dvb-daemon playing instructions.
Nowadays need to pass -M for mplayer style for gstreamer to be happy about it.


Full debug log with *dvb*:5 follows:


$ GST_DEBUG=*dvb*:5 gst-launch-0.10 -v playbin2 uri=dvb://Kanal%202 
Setting pipeline to PAUSED ...
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: ring-buffer-max-size = 0
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: buffer-size = -1
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: buffer-duration = -1
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: use-buffering = FALSE
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: download = FALSE
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: uri = "dvb://Kanal%202"
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: connection-speed = 0
0:00:00.619933789 28072      0x24160a0 DEBUG                 dvbsrc
gstdvbsrc.c:881:gst_dvbsrc_plugin_init: binding text domain
gst-plugins-bad-0.10 to locale dir /usr/local/share/locale
0:00:00.620216089 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:459:gst_dvbsrc_init:<GstDvbSrc at 0x24c5b00> gst_dvbsrc_init
0:00:00.620232152 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:529:gst_dvbsrc_set_property:<dvbsrc0> Set Property:
ARG_DVBSRC_POLARITY
0:00:00.621264692 28072      0x24160a0 DEBUG             dvbbasebin
dvbbasebin.c:626:foreach_stream_build_filter: stream 0 usecount 1
0:00:00.621276285 28072      0x24160a0 DEBUG             dvbbasebin
dvbbasebin.c:626:foreach_stream_build_filter: stream 1 usecount 1
0:00:00.621284317 28072      0x24160a0 DEBUG             dvbbasebin
dvbbasebin.c:626:foreach_stream_build_filter: stream 17 usecount 1
0:00:00.621291860 28072      0x24160a0 DEBUG             dvbbasebin
dvbbasebin.c:626:foreach_stream_build_filter: stream 16 usecount 1
0:00:00.621299333 28072      0x24160a0 DEBUG             dvbbasebin
dvbbasebin.c:626:foreach_stream_build_filter: stream 20 usecount 1
0:00:00.621306946 28072      0x24160a0 DEBUG             dvbbasebin
dvbbasebin.c:626:foreach_stream_build_filter: stream 18 usecount 1
0:00:00.621315117 28072      0x24160a0 INFO              dvbbasebin
dvbbasebin.c:649:dvb_base_bin_rebuild_filter:<DvbBaseBin at 0x24c6100> rebuilt
filter 18:20:16:17:1:0
0:00:00.621325384 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:535:gst_dvbsrc_set_property:<dvbsrc0> Set Property: ARG_DVBSRC_PIDS
0:00:00.621335721 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:562:gst_dvbsrc_set_property:<dvbsrc0> Parsed Pid: 18

0:00:00.621343962 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:562:gst_dvbsrc_set_property:<dvbsrc0> Parsed Pid: 20

0:00:00.621351645 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:562:gst_dvbsrc_set_property:<dvbsrc0> Parsed Pid: 16

0:00:00.621359118 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:562:gst_dvbsrc_set_property:<dvbsrc0> Parsed Pid: 17

0:00:00.621367149 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:575:gst_dvbsrc_set_property:<dvbsrc0> checking if playing for
setting pes filters
0:00:00.621378953 28072      0x24160a0 INFO                  dvbsrc
gstdvbsrc.c:529:gst_dvbsrc_set_property:<dvbsrc0> Set Property:
ARG_DVBSRC_POLARITY
0:00:00.621747927 28072      0x24160a0 DEBUG                 dvbsrc
gstdvbsrc.c:846:gst_dvbsrc_finalize:<dvbsrc0> gst_dvbsrc_finalize
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstURIDecodeBin:uridecodebin0: No URI handler implemented
for "dvb".
Additional debug info:
gsturidecodebin.c(1177): gen_source_element ():
/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0
Setting pipeline to NULL ...
Freeing pipeline ...

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