<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"><html><head><meta name="qrichtext" content="1" /><style type="text/css">p, li { white-space: pre-wrap; }</style></head><body style=" font-family:'Bitstream Vera Sans'; font-size:10pt; font-weight:400; font-style:normal;">In data venerdė 29 maggio 2009 11:11:21, MailingList SVR ha scritto: : > Hi all, > > I'm trying to build a gstreamer application all is fine until I try to get a message from the bus. I tested the sample python webcam viewer (http://pygstdocs.berlios.de/pygst-tutorial/webcam-viewer.html) and all is fine: when I start the viewer messages are sent to the bus and if I disconnect the camera an error message is sent to the bus, good, > > so I added the following code to my own application (twisted based), this is a cut and paste from the webcam viewer app: > > bus = self.pipeline.get_bus() > bus.add_signal_watch() > bus.connect("message",self.on_message) > > and: > > def on_message(self,bus,message): > print 'new message' > t=message.type > print t > print type(t) > > this time i can start and see the video but no message go to the bus neither when I start to see the video or disconnect the camera and no errors are given, maybe the gstreamer bus rely on gtk? Can I use the bus inside twisted? > > What I missed? > > thanks > Nicola > Ok the problem seems solved, I have to start my gstreamer pipeline as gobject loop and from my twisted frontend I have to start the loop as a separate thread .... nothing simpler? Is this the only way? Nicola</body></html>