Break down pipelines using udpsrc/udpsink

[Gary Thomas]

I'm trying to split up a pipeline using udpsrc/udpsink elements.
All of the "network" traffic will be local.  This is in anticipation
of having some variable number of sinks for a single data source
(I have a camera that I want to share amongst a number of applications)

I have this working pipeline:
   gst-launch -e -v v4l2src device=/dev/video0 queue-size=16 \
     ! video/x-raw-yuv,format='(fourcc)UYVY',width=1280,height=720,framerate=30/1 \
     ! tee name=v-t \
       v-t. ! queue ! videoscale ! "video/x-raw-yuv,width=240,height=120" ! ffmpegcolorspace ! ximagesink force-aspect-ratio=true
This pipeline just takes the output of the camera and displays it in
a window on my desktop.

I've tried splitting it up like this:
   # Start the source pipeline
   gst-launch -e -v v4l2src device=/dev/video0 queue-size=16 \
      ! video/x-raw-yuv,format='(fourcc)UYVY',width=1280,height=720,framerate=30/1 \
      ! tee name=v-src \
        v-src. ! queue ! rtpvrawpay pt=96 ! udpsink port=61000

   # Display the image
   gst-launch -e -v udpsrc port=61000  \
     ! 
"application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)RAW,sampling=(string)YCbCr-4:2:2,depth=(string)8,width=(string)1280,height=(string)720,colorimetry=(string)SMPTE240M,payload=(int)96" 
\
     ! rtpvrawdepay \
     ! video/x-raw-yuv,format='(fourcc)UYVY',width=1280,height=720,framerate=30/1 \
     ! tee name=v-t \
       v-t. ! queue ! videoscale ! "video/x-raw-yuv,width=240,height=120" ! ffmpegcolorspace ! ximagesink force-aspect-ratio=true

I can see that the packets are being sent between the two pipelines,
but it looks like they are being quietly dropped (no messages).  It's
not totally clear that they are arriving to the second pipeline at all.
I've also tried this where the source pipeline is on one machine and
the receiving pipeline is on another, still no luck.

I know that the CAPS match because I copied them from the output of
a previous run.

Any hints what I might be doing wrong & how to make this work?

Is this a reasonable approach to sharing this data?  Eventually
I need to grab & display it on the screen while at the same time
sending it out over a [physical] network.

Thanks

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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