[gst-devel] Need help getting simple rtp pipeline to work

ved kpl ved.kpl at gmail.com
Wed May 21 09:10:58 CEST 2008


Which version r u using?.
The error states that the caps are not getting negotiated in ur
receiving pipeline,
one of the elements there doesnot support the incoming format.
I tried the same pipelines,. It didnt throw any errors, although
nothing got displayed
at the receving end.
Try using xvimagesink or some other sinks directly instead of autosink.
Also try  other formats like audio eg. mpeg audio mp3..(rtpmpadepay/pay)


On Wed, May 21, 2008 at 4:34 AM, Jon Dufresne <jon.dufresne at gmail.com> wrote:
> I am trying to experiment with gstreamer. I am particularly interested
> in the rtp elements. I have tried to read quite a bit to get idea of
> how to develop  and usewith gstreamer. So far I have mostly messed
> around with the python bindings, gst-inspect, and gst-launch. Even
> though I have only just started using this I can already see how
> powerful a system with gstreamer's design can be.
> I have been trying to set up a simple pipeline using rtp and simply
> can not get it to work. I have been working on this for three days now
> with no progress. I am running the following two pipelines in two
> different terminals. I start the receiving pipeline first
> receiving pipeline:
> gst-launch -v udpsrc ! .recv_rtp_sink_0 gstrtpbin ! rtptheoradepay !
> theoradec ! autovideosink
> sending pipeline:
> gst-launch -v videotestsrc ! theoraenc ! rtptheorapay !
> .send_rtp_sink_0 gstrtpbin ! udpsink
> Whenever I run this I receive the following error in the terminal
> running the receiving pipeline:
> ERROR: from element /pipeline0/udpsrc0: Internal data flow error.
> Additional debug info:
> gstbasesrc.c(2099): gst_base_src_loop (): /pipeline0/udpsrc0:
> streaming task paused, reason not-negotiated (-4)
> I'm not sure exactly what this means I have searched for what this
> might mean, but I haven't been able to find any solutoins.
> Any help as to what I am doing wrong?
> Thanks,
> Jon
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