[Bug 721425] New: uridecodebin isn't always able to stream from gst-rtsp-server

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=721425
  GStreamer | gst-plugins-base | git

           Summary: uridecodebin isn't always able to stream from
                    gst-rtsp-server
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: pedro at pedrocr.net
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


When using uridecodebin to stream from gst-rtsp-server there seems to be some
kind of race condition that makes it so sometimes it will play fine and
sometimes block  just after starting. Here's a simple way to test this:

1) Run test-video from the gst-rtsp-server examples
2) Launch the following pipeline:

gst-launch-1.0 uridecodebin uri=rtsp://127.0.0.1:8554/test ! videoconvert !
ximagesink

Most of the time this will result in a stopped pipeline. Sometimes though it
will play fine. Timing seems to be key as changing debug level alters the
frequency of the problem ocurring. Here's the GST_DEBUG=4 output of one of the
times it stopped:

0:00:00.852989096  4100 0xb6536f50 INFO              GST_STATES
gstelement.c:2328:gst_element_continue_state:<source> completed state change to
PLAYING
0:00:00.853116914  4100 0xb6536f50 INFO              GST_STATES
gstbin.c:2656:gst_bin_change_state_func:<uridecodebin0> child 'source' changed
state to 4(PLAYING) successfully
0:00:00.853237256  4100 0xb6536f50 INFO              GST_STATES
gstelement.c:2328:gst_element_continue_state:<uridecodebin0> completed state
change to PLAYING
0:00:00.853350332  4100 0xb6536f50 INFO              GST_STATES
gstelement.c:2233:_priv_gst_element_state_changed:<uridecodebin0> notifying
about state-changed PAUSED to PLAYING (VOID_PENDING pending)
0:00:00.853610213  4100 0xb6536f50 INFO              GST_STATES
gstbin.c:2656:gst_bin_change_state_func:<pipeline0> child 'uridecodebin0'
changed state to 4(PLAYING) successfully
0:00:00.853897732  4100 0xb6536f50 INFO              GST_STATES
gstelement.c:2328:gst_element_continue_state:<pipeline0> completed state change
to PLAYING
0:00:00.853972143  4100 0xb6536f50 INFO              GST_STATES
gstelement.c:2233:_priv_gst_element_state_changed:<pipeline0> notifying about
state-changed PAUSED to PLAYING (VOID_PENDING pending)
0:00:01.538434967  4100 0xb5b01e90 INFO               GST_EVENT
gstevent.c:709:gst_event_new_segment: creating segment event time segment
start=0:00:00.000000000, stop=99:99:99.999999999, rate=1.000000,
applied_rate=1.000000, flags=0x00, time=0:00:00.000000000,
base=0:00:00.000000000, position 0:00:00.000000000, duration 99:99:99.999999999
0:00:01.538596623  4100 0xb5b01e90 INFO                 basesrc
gstbasesrc.c:2778:gst_base_src_loop:<udpsrc4> marking pending DISCONT
0:00:01.538852051  4100 0xb5b01e90 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp,
ssrc=(uint)2111828647
0:00:01.538969446  4100 0xb5b01e90 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp
0:00:01.539035799  4100 0xb5b01e90 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp,
ssrc=(uint)2111828647
0:00:01.700806657  4100 0xb652ee00 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp
0:00:01.701917220  4100 0xb652ee00 INFO               GST_EVENT
gstevent.c:709:gst_event_new_segment: creating segment event time segment
start=0:00:00.000000000, stop=99:99:99.999999999, rate=1.000000,
applied_rate=1.000000, flags=0x00, time=0:00:00.000000000,
base=0:00:00.000000000, position 0:00:00.000000000, duration 99:99:99.999999999
0:00:01.788936625  4100 0xb650f830 INFO               GST_EVENT
gstevent.c:709:gst_event_new_segment: creating segment event time segment
start=0:00:00.000000000, stop=99:99:99.999999999, rate=1.000000,
applied_rate=1.000000, flags=0x00, time=0:00:00.000000000,
base=0:00:00.000000000, position 0:00:00.000000000, duration 99:99:99.999999999
0:00:01.789113468  4100 0xb650f830 INFO                 basesrc
gstbasesrc.c:2778:gst_base_src_loop:<udpsrc1> marking pending DISCONT
0:00:01.789374905  4100 0xb650f830 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp,
ssrc=(uint)3846578192
0:00:01.789613075  4100 0xb650f830 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp
0:00:01.789796425  4100 0xb650f830 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp,
ssrc=(uint)3846578192
0:00:02.123445837  4100 0xb652ee30 INFO               GST_EVENT
gstevent.c:628:gst_event_new_caps: creating caps event application/x-rtcp
0:00:02.123588691  4100 0xb652ee30 INFO               GST_EVENT
gstevent.c:709:gst_event_new_segment: creating segment event time segment
start=0:00:00.000000000, stop=99:99:99.999999999, rate=1.000000,
applied_rate=1.000000, flags=0x00, time=0:00:00.000000000,
base=0:00:00.000000000, position 0:00:00.000000000, duration 99:99:99.999999999
0:00:02.431870032  4100 0xb510d120 INFO         rtpjitterbuffer
gstrtpjitterbuffer.c:2723:do_deadline_timeout:<rtpjitterbuffer0> got deadline
timeout

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