this page (togheter with a bunch of other links I could not be able to find the links again...) was really helpfull to learn how make a workable gstreamer app on maemo.
http://wiki.forum.nokia.com/index.ph...ions_-_Part_II

anyway I believe it contain an error:
...
response = dialog.run()
dialog.hide()
file_name = selector.get_filename()
....
To fix it should be enough changeing 'selector' with 'dialog'