[gst-devel] Problems with RTP "README commands"

[Mario Latronico]

Hello,

i'm trying to stream through RTP with GStreamer. I'm following the
instructions found in the README file

http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/gst/rtp/README?revision=1.12&view=markup

but they don't work.

In one shell i launch the pipeline with videotestsrc and rtp encoder:

mario at mario-laptop:~$ gst-launch-0.10 -v videotestsrc ! ffenc_h263p !
rtph263ppay ! udpsink

Setting pipeline to PAUSED ...
/pipeline0/videotestsrc0.src: caps = video/x-raw-yuv,
format=(fourcc)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
Pipeline is PREROLLING ...
/pipeline0/ffenc_h263p0.src: caps = video/x-h263, width=(int)320,
height=(int)240, framerate=(fraction)30/1, variant=(string)itu,
h263version=(string)h263p
/pipeline0/ffenc_h263p0.sink: caps = video/x-raw-yuv,
format=(fourcc)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/pipeline0/rtph263ppay0.src: caps = application/x-rtp,
media=(string)video, payload=(int)96, clock-rate=(int)90000,
encoding-name=(string)H263-1998, ssrc=(guint)1872438787,
clock-base=(guint)3606828362, seqnum-base=(guint)60791
/pipeline0/rtph263ppay0.sink: caps = video/x-h263, width=(int)320,
height=(int)240, framerate=(fraction)30/1, variant=(string)itu,
h263version=(string)h263p
/pipeline0/udpsink0.sink: caps = application/x-rtp,
media=(string)video, payload=(int)96, clock-rate=(int)90000,
encoding-name=(string)H263-1998, ssrc=(guint)1872438787,
clock-base=(guint)3606828362, seqnum-base=(guint)60791
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

then i copy the caps of udpsink and try to launch the udp receiver in
another shell:

mario at mario-laptop:~$ gst-launch-0.10 -v udpsrc
caps="application/x-rtp, media=(string)video, payload=(int)96,
clock-rate=(int)90000, encoding-name=(string)H263-1998,
ssrc=(guint)1872438787, clock-base=(guint)3606828362,
seqnum-base=(guint)60791" ! rtph263pdepay ! ffdec_h263 ! ximagesink
sync=false
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/pipeline0/rtph263pdepay0.sink: caps = application/x-rtp,
media=(string)video, payload=(int)96, clock-rate=(int)90000,
encoding-name=(string)H263-1998, ssrc=(guint)1872438787,
clock-base=(guint)3606828362, seqnum-base=(guint)60791
/pipeline0/rtph263pdepay0.src: caps = video/x-h263,
variant=(string)itu, h263version=(string)h263p
/pipeline0/ffdec_h2630.sink: caps = video/x-h263, variant=(string)itu,
h263version=(string)h263p
/pipeline0/ffdec_h2630.src: caps = video/x-raw-yuv, width=(int)320,
height=(int)240, framerate=(fraction)30/1, format=(fourcc)I420,
pixel-aspect-ratio=(fraction)1/1
ERROR: from element /pipeline0/udpsrc0: Internal data flow error.
Additional debug info:
gstbasesrc.c(1642): gst_base_src_loop (): /pipeline0/udpsrc0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 101151000 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
/pipeline0/ffdec_h2630.src: caps = NULL
/pipeline0/ffdec_h2630.sink: caps = NULL
/pipeline0/rtph263pdepay0.src: caps = NULL
/pipeline0/rtph263pdepay0.sink: caps = NULL
/pipeline0/udpsrc0.src: caps = NULL
Setting pipeline to NULL ...
FREEING pipeline ...

What am i doing wrong ?

I'm using Kubuntu GNU/Linux 7/04 with the following gstreamer packets:

mario at mario-laptop:~$ dpkg -l | grep gst

ii  gstreamer0.10-alsa                         0.10.12-0ubuntu1
               GStreamer plugin for ALSA
ii  gstreamer0.10-ffmpeg                       0.10.2-0ubuntu4
               FFmpeg plugin for GStream
er
ii  gstreamer0.10-fluendo-mpegdemux            0.10.4-0ubuntu1
               Fluendo GStreamer plugin
for MPEG2 demuxing
ii  gstreamer0.10-plugins-bad                  0.10.4-1ubuntu1
               GStreamer plugins from th
e "bad" set
ii  gstreamer0.10-plugins-base                 0.10.12-0ubuntu1
               GStreamer plugins from th
                                     e "base" set
ii  gstreamer0.10-plugins-base-apps            0.10.12-0ubuntu1
               GStreamer helper programs
                                      from the "base" se
ii  gstreamer0.10-plugins-farsight             0.10.2-1ubuntu2
               Gstreamer plugins for aud
                                     io/video conferenci
ii  gstreamer0.10-plugins-good                 0.10.5-1ubuntu2
               GStreamer plugins from th
                                     e "good" set
ii  gstreamer0.10-tools                        0.10.12-0ubuntu2
               Tools for use with GStrea
                                     mer
ii  gstreamer0.10-x                            0.10.12-0ubuntu1
               GStreamer plugins for X11
                                      and Pango
ii  gstreamer0.8-theora                        0.8.12-6ubuntu3
               Theora plugin for GStream
                                     er
ii  libgstreamer-plugins-base0.10-0            0.10.12-0ubuntu1
               GStreamer libraries from
                                     the "base" set
ii  libgstreamer-plugins-base0.10-dev          0.10.12-0ubuntu1
               GStreamer development fil
                                     es for libraries fr
ii  libgstreamer0.10-0                         0.10.12-0ubuntu2
               Core GStreamer libraries
                                     and elements
ii  libgstreamer0.10-dev                       0.10.12-0ubuntu2
               GStreamer core developmen
                                     t files
ii  libgstreamer0.8-0                          0.8.12-2
               Core GStreamer libraries,
                                      plugins, and utili
ii  python-gst0.10                             0.10.6-1ubuntu3
               generic media-playing fra
                                     mework (Python bind


Thank you for you support !!!
Mario Latronico