[Bug 773783] New: rtpjitterbuffer: lost event not emitted

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=773783

            Bug ID: 773783
           Summary: rtpjitterbuffer: lost event not emitted
    Classification: Platform
           Product: GStreamer
           Version: 1.9.90
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: marcin at saepia.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

I use 1.9.90 with applied patches from bug 771723.

When I run the following pipeline

sender:

gst-launch-1.0.exe -v audiotestsrc is-live=true ! queue ! audioconvert !
audioresample ! audiocheblimit mode=1 cutoff=80.0 ! audioconvert !
audioresample ! identity drop-probability=0.05 ! opusenc
packet-loss-percentage=10 complexity=10 inband-fec=true dtx=true bitrate-type=0
bandwidth=-1000 bitrate=96000 audio-type=2049 ! rtpopuspay ! udpsink port=5000
host=127.0.0.1

receiver:

gst-launch-1.0.exe -v -m udpsrc port=5000 timeout=1000000000
caps=application/x-rtp,media=audio reuse=false ! rtpjitterbuffer do-lost=true !
rtpopusdepay ! opusdec plc=true use-inband-fec=true apply-gain=false !
audioconvert ! audioresample ! autoaudiosink

the PLC is not triggered. It seems that lost events are not emitted.

I have enabled GST_DEBUG=opusdec:5 in the receiver and the only thing I get is

0:00:25.259822612  5236 00000000030BC140 DEBUG                opusdec
gstopusdec.c:530:opus_dec_chain_parse_data:<opusdec0> Using buffer of size 240
0:00:25.263299653  5236 00000000030BC140 DEBUG                opusdec
gstopusdec.c:642:opus_dec_chain_parse_data:<opusdec0> decoded 960 samples
0:00:25.274930558  5236 00000000030BC140 DEBUG                opusdec
gstopusdec.c:504:opus_dec_chain_parse_data:<opusdec0> Received buffer of size
240
0:00:25.278308575  5236 00000000030BC140 DEBUG                opusdec
gstopusdec.c:530:opus_dec_chain_parse_data:<opusdec0> Using buffer of size 240
0:00:25.281801531  5236 00000000030BC140 DEBUG                opusdec
gstopusdec.c:642:opus_dec_chain_parse_data:<opusdec0> decoded 960 samples

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