RTPsource : h264/rtp packets not received (update_receiver_stats: probation)

[vk_gst]

Hi,

Thanks for the hint.

The bitrate on encoder and 'udpsink' was set to 1000 Kbps. Additionally, I
tried varying the buffer size of 'udpsrc' to 50K - 100k as per  UDP_src
<https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good/html/gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--buffer-size>  
.

With the above changes there was no change in the behavior. I used wireshark
to analyse the server and client device. Here is the output I receive at the
server device: 

server = 192.168.5.222, client = 192.168.5.221 and I am using port 5001 at
udpsink for video. 


   8 1.921299652      0.0.0.0 → 255.255.255.255 UDP 107 4712 → 4711 Len=65
    9 1.921429997      0.0.0.0 → 255.255.255.255 UDP 99 4712 → 4711 Len=57
   10 1.942681993 192.168.5.222 → 192.168.5.221 UDP 56 50833 → 5001 Len=14
   11 2.054841859 192.168.5.222 → 192.168.5.221 UDP 63 50833 → 5001 Len=21
   12 2.058376191 192.168.5.221 → 192.168.5.222 ICMP 84 Destination
unreachable (Port unreachable)
   13 2.169254947 192.168.5.221 → 192.168.5.222 ICMP 91 Destination
unreachable (Port unreachable)
   14 2.222870320 192.168.5.222 → 192.168.5.221 UDP 58 50833 → 5001 Len=16
   15 2.246495208 192.168.5.21 → 192.168.5.255 UDP 774 51437 → 7000 Len=732
   16 2.349279536 192.168.5.221 → 192.168.5.222 ICMP 86 Destination
unreachable (Port unreachable)
   17 2.350906356 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   18 2.351536082 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   19 2.352102802 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   20 2.352645519 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   21 2.353190237 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   22 2.353721287 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   23 2.354265005 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   24 2.354827391 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   25 2.355372109 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   26 2.355926161 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   27 2.356489547 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   28 2.357056267 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   29 2.357675659 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   30 2.358255047 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   31 2.358807432 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400
   32 2.359473161 192.168.5.222 → 192.168.5.221 UDP 1442 50833 → 5001
Len=1400


After this, there are no video packets sent to port 5001 from the server
device (192.168.5.222). However the server regularly sends rtcp sender
report (on port 5002) to the client device. eg:

836	159.050823685	192.168.5.222	192.168.5.221	UDP	102	40336 → 5002 Len=60
866	164.816046582	192.168.5.222	192.168.5.221	UDP	102	40336 → 5002 Len=60
882	168.335318185	192.168.5.222	192.168.5.221	UDP	102	40336 → 5002 Len=60

What could be the reason that only sender reports are being sent by the
server device and no rtp video packets. What I understand is that the error
'Port Unreachable' can be due to the client application not able to handle
the received data.

Can anyone point out where I am going wrong? 

Regards.



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