Problems with udpsrc in IPv6

[fedejinkis]

I have tried with rtpjitterbuffer next to udpsrc element and before of
h264depay. It is possible that the repeated packets has been ignored, but,
the problem persist, even with the property no-lost=true.
Maybe the main problem is the network, but, it is very strange, I am using
an AdHoc network and a common home network... I think that the problem is
in the elements that I use to build the pipeline, or maybe, GStreamer just
can not deal with IPv6. How Chinese people (who have in general IPv6) work
with this kind of streams?
I really need to find a solution of this issue, but, I do not know where
search. I am sure that there must be a way to stablish the connection
properly, after all, IPv6 supposedly is better to this kind of
applications...

Thanks again Sebastian!
Federico Jinkis

El 19 nov. 2016 07:22, "Sebastian Dröge-3 [via GStreamer-devel]" <
ml-node+s966125n4680781h75 at n4.nabble.com> escribió:

> On Wed, 2016-11-16 at 11:38 -0800, fedejinkis wrote:
> > As you said, I checked the sequence number of the RTP packets and there
> are
> > not monotonically increasing in my mesh. In fact, some of them are the
> same,
> > but in many opportunities, the sequence number is an old one.
>
> That means packets are resent. rtpjitterbuffer would fix that part.
>
> > On the other hand, in my home network, the RTP packets are not
> monotonically
> > increasing either. The video stream is bad and although now is not a
> gray
> > screen, the video have about more than minute and a half of delay, the
> old
> > sequence numbers are much less frequent but the presence of the repeated
> > sequence number ones are equally than the in the mesh.
>
> Basically it looks like you have packet loss and/or other problems in
> your network then. To some degree rtpjitterbuffer can fix that,
> especially if you set up RTX (or FEC).
>
> Check in the rtpjitterbuffer logs what it complains about to see which
> parts it can't fix anymore by itself.
>
> > In what respect of SPS/PPS code data in the H264, I also tried to see
> them
> > with Wireshark (I do not know how to do it with some plugin of
> GStreamer, in
> > fact, I have had a look in gst-inspect but I did not realise what
> property
> > or cap must be set to it). I saw that for every 3 or 4 packets with
> > different sequence number, one with start bit and payload unit has been
> > sent.
>
> Ideally SPS/PPS are passed out of band via the SDP (or caps). Otherwise
> the payloader can also insert them in regular intervals into the
> stream, or the encoder.
>
> > So, the packets are arriving late, are not them?
> > How can I find a solution to this issue? There is a special command to
> > stream and receive in IPv6? Or is just that my network it is not
> properly to
> > this application?
>
> See above, I'd say your network has some problems.
>
> --
> Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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