porting PyGST app to GStreamer1.0 + PyGI

Question

I have a python audio player based on gstreamer and dbus http://sourceforge.net/p/autoradiobc/code/210/tree/trunk/autoradio/autoplayer/player_gstreamer1.py . It works with pygst and I want port it to gstreamer 1. Following this how to https://wiki.ubuntu.com/Novacut/GStreamer1.0 it's going to work but:

File "/home/pat1/svn/autoradio/autoradio/autoplayer/player.py", line 826, in position
except(Gst.QueryError):
File "/usr/lib64/python2.7/site-packages/gi/module.py", line 316, in __getattr__
return getattr(self._introspection_module, name)
File "/usr/lib64/python2.7/site-packages/gi/module.py", line 135, in __getattr__
self.__name__, name))
AttributeError: 'gi.repository.Gst' object has no attribute 'QueryError'

it's in this part of code:

try:
  pos_int = self.player.query_position(Gst.Format.TIME, None)[0]
except(Gst.QueryError):
  logging.warning( "Gst.QueryError in query_position" )
  return None

bypassing this problem after I get :

if ret == Gst.State.CHANGE_FAILURE:
AttributeError: type object 'GstState' has no attribute 'CHANGE_FAILURE'

in this part of code:

ret = self.player.set_state(Gst.State.READY)
if ret == Gst.State.CHANGE_FAILURE:
  logging.error( "Unable to set the pipeline to the READY state.")

bypassing this problem too, I get:

File "/home/pat1/svn/autoradio/autoradio/autoplayer/player.py", line 659, in on_message_state_changed
(Gst.element_state_get_name(old_state),
File "/usr/lib64/python2.7/site-packages/gi/module.py", line 316, in __getattr__
return getattr(self._introspection_module, name)
File "/usr/lib64/python2.7/site-packages/gi/module.py", line 135, in __getattr__
self.__name__, name))
AttributeError: 'gi.repository.Gst' object has no attribute 'element_state_get_name'

in this part of code:

    logging.debug("Pipeline state changed from %s to %s. Pendig: %s"%
                 (Gst.element_state_get_name(old_state),
                  Gst.element_state_get_name (new_state),
                  Gst.element_state_get_name (pending_state)))

commenting out element_state_get_name the player is going to work ....

How I can migrate to gstreamer 1 the full code without bypass the broken code ?

Answer 1

I cannot find solution to the first problem about QueryError

but :

if ret == Gst.State.CHANGE_FAILURE:

become:

if ret == Gst.StateChangeReturn.FAILURE:

and:

Gst.element_state_get_name(old_state)

become:

Gst.Element.state_get_name(old_state)

and:

      self.player.set_new_stream_time(0L)

become:

      self.player.set_start_time(0L)

and:

     event = Gst.event_new_seek(1.0, Gst.Format.TIME,
             Gst.SeekFlags.FLUSH|Gst.SeekFlags.ACCURATE,
             Gst.SEEK_TYPE_SET, tnano, Gst.SEEK_TYPE_NONE, 0)

become:

     event = Gst.Event.new_seek(1.0, Gst.Format.TIME,
             Gst.SeekFlags.FLUSH|Gst.SeekFlags.ACCURATE,
             Gst.SeekType.SET, tnano, Gst.SeekType.NONE, 0)

and:

    pos_int = self.player.query_duration(Gst.Format.TIME, None)[0]

become:

    pos_int = self.player.query_duration(Gst.Format.TIME)[1]