[Bug 777228] New: decoders do not support discontinuity well

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=777228

            Bug ID: 777228
           Summary: decoders do not support discontinuity well
    Classification: Platform
           Product: GStreamer
           Version: 1.10.2
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: jon.mandrell at zii.aero
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

I am attempting to play a stream coming from a satellite TV provider. This
stream sometimes has dropped packets but I still expect it to be roughly
playable (I know there will be audio and video glitches from time to time).
However, when I attempt to play this using gstreamer 1.10.2 decoders appear to
stop across the discontinuity.

A simple example is the following test pipeline I've been using (this only
plays the audio part of the stream just to keep things simple, but it happens
with video as well):
gst-launch-1.0 -v udpsrc uri=udp://239.192.16.11:52416 do-timestamp=true !
application/x-rtp,media=video,clock-rate=90000 ! rtpsession ! rtpssrcdemux !
rtpjitterbuffer latency=1000 do-lost=true ! rtpptdemux ! rtpmp2tdepay ! tsdemux
! audio/mpeg ! queue ! avdec_aac ! audioconvert ! alsasink sync=true

I have placed a copy of a .pcap file that exhibits this problem on dropbox at:
https://www.dropbox.com/s/a32nf2p1roxhgll/short.pcap?dl=0

Using GST_DEBUG=*:2 the message that is logged at the discontinuity point is:
0:00:39.530837723  1306  0x1363f20 ERROR                  libav :0:: Input
buffer exhausted before END element found
0:00:39.530960400  1306  0x1363f20 WARN                   libav
gstavauddec.c:632:gst_ffmpegauddec_frame:<avdec_aac0> avdec_aac: decoding error
(len: -1094995529, have_data: 0)

If I decode the video portion of the stream using this pipeline:
gst-launch-1.0 -v udpsrc uri=udp://239.192.16.11:52416 do-timestamp=true !
application/x-rtp,media=video,clock-rate=90000 ! rtpsession ! rtpssrcdemux !
rtpjitterbuffer latency=1000 do-lost=true ! rtpptdemux ! rtpmp2tdepay ! tsdemux
! video/x-h264 ! h264parse ! avdec_h264 ! fakesink
it also fails. The GST_DEBUG output is:
0:00:39.275041817  1385  0x213a950 ERROR                  libav :0:: error
while decoding MB 32 20, bytestream -24

Immediately at this point the decoder stops outputting frames.

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