Trying to stream mp4 video across network but play audio locally

[Chris Bare]

I'm trying to figure out how to use gstreamer to read an mp4 file, stream
the h.264 video over the network to another gstreamer, and play the audio
locally.

I tried this on the sending side:
gst-launch-1.0 playbin uri=file:///storage/2015test/P1000332.MP4
video-sink="rtph264pay ! udpsink host=10.1.10.17 port=5555"

and this on the display side:
gst-launch-1.0 udpsrc port=5555 caps="application/x-rtp" ! queue !
rtph264depay ! decodebin ! videoconvert ! autovideosink

And I hear the audio, but the display side doesn't seem to hear anything. I
don't get any pipeline or network errors, though.

Can anyone give me some pointers on the most efficient way to implement
this?
The display side is a raspberry pi, so it's ok to make it h.264 specific.
I'd like to be able to auto-detect different audio formats on the sending
side, if possible, since all mp4s are not encoded the same way.

-- 
Chris Bare
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