Python 将PyGST应用程序移植到GStreamer1.0+；皮吉

我有一个基于gstreamer和dbus的python音频播放器。它与pygst一起工作，我希望将其移植到gstreamer 1。 按照下面的说明，它将如何工作，但是：

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'

在代码的这一部分：

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

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.")

    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)))

在获得以下信息后绕过此问题：

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

在本部分代码中：

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

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.")

    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)))

绕过这个问题，我得到：

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'

在本部分代码中：

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

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.")

    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)))

注释出元素\u状态\u获取\u玩家将要工作的名称

---

如何将完整代码迁移到gstreamer 1而不绕过已损坏的代码？

我无法找到有关QueryError的第一个问题的解决方案

但是：

成为：

if ret == Gst.StateChangeReturn.FAILURE:

Gst.Element.state_get_name(old_state)

      self.player.set_start_time(0L)

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

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

以及：

成为：

if ret == Gst.StateChangeReturn.FAILURE:

Gst.Element.state_get_name(old_state)

      self.player.set_start_time(0L)

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

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

以及：

成为：

if ret == Gst.StateChangeReturn.FAILURE:

Gst.Element.state_get_name(old_state)

      self.player.set_start_time(0L)

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

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

以及：

成为：

if ret == Gst.StateChangeReturn.FAILURE:

Gst.Element.state_get_name(old_state)

      self.player.set_start_time(0L)

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

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

以及：

成为：

if ret == Gst.StateChangeReturn.FAILURE:

Gst.Element.state_get_name(old_state)

      self.player.set_start_time(0L)

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

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