works with gst-launch but not in python

[Rohan-14]

Hi all,

I am trying to stream video and audio over the network.  I have the
video working so far thanks to pointing out my little blunder the
other day.

But audio is not working, and this time I have remembered to add the
src to the pipeline.  The gst-launch sequence works perfectly, so I am
obviously missing another obvious thing.

These are the gst-launch commands that play happily together:

sender:

gst-launch-010 audiotestsrc ! queue ! audioconvert ! speexenc ! \
tcpserversink host=127.0.0.1 port=5001

receiver:

gst-launch-0.10 tcpclientsrc host=127.0.0.1 port=5001 ! speexdec ! \
queue ! alsasink sync=false

And here are the python scripts that are just reiterating this in
python, but it is not working

-------------------------------------------------------------------
#!/bin/env python

# sound_receiver.py

#gst-launch-0.10 tcpclientsrc host=127.0.0.1 port=5001 ! speexdec ! queue !
alsasink sync=false

import gobject
import pygst
pygst.require("0.10")
import gst

class server(object):
        def __init__(self):
                pipe = gst.Pipeline("receive")
                src = gst.element_factory_make("tcpclientsrc")
                src.set_property("host", '127.0.0.1')
                src.set_property("port", 5001)

                pipe.add(src)

                sbin = self.buildsound()
                pipe.add(sbin)
                src.link(sbin)

                pipe.set_state(gst.STATE_PLAYING )

        def buildsound(self):
                bin = gst.Bin("sound")
                speexdec = gst.element_factory_make("speexdec")
                queue = gst.element_factory_make('queue')
                soundsink = gst.element_factory_make("autoaudiosink")
                bin.add(speexdec, queue, soundsink)
                gst.element_link_many(speexdec, queue, soundsink)
               
                binsink = gst.GhostPad("sbinsink", speexdec.get_pad("sink"))
                bin.add_pad(binsink)
                return bin
               
if __name__ == "__main__":
        server()
        loop = gobject.MainLoop()
        loop.run()

----------------------------------------------------------------------
#!/bin/env python

# sound_sender.py

# gst-launch-010 audiotestsrc ! queue ! audioconvert ! speexenc ! tcpserversink
host=127.0.0.1 port=5001

import gobject
import pygst
pygst.require("0.10")
import gst

class client(object):
        def __init__(self):
                pipe = gst.Pipeline("sound")
                src = gst.element_factory_make("audiotestsrc")
                sbin = self.build_sound()
               
                pipe.add(src, sbin)
                src.link(sbin)

                pipe.set_state(gst.STATE_PLAYING)

        def build_sound(self):
                bin = gst.Bin("sbin")
                queue = gst.element_factory_make("queue")
                decode = gst.element_factory_make("decodebin")
                convert = gst.element_factory_make("audioconvert")
                speexenc = gst.element_factory_make("speexenc")
                sink = gst.element_factory_make("tcpserversink")
                sink.set_property("host", '127.0.0.1')
                sink.set_property("port", 5001)
                bin.add(queue, decode, convert, speexenc, sink)
                gst.element_link_many(queue, convert, speexenc, sink)

                binsink = gst.GhostPad("sbinsink", queue.get_pad("sink"))
                bin.add_pad(binsink)
                return bin
               


if __name__ == '__main__':
        client()
        loop = gobject.MainLoop()
        loop.run()
--------------------------------------------------------------------

I have noticed that with the gst-launch sequences you must have the
sound sender running before starting the sound receiver, but starting
the python scripts in either order makes no difference to the outcome:
no sound, and no error output.

Thanks in advance for any help, this has had me stumped for a while
now,

Rohan

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