[英]porting PyGST app to GStreamer1.0 + PyGI
我有一個基於gstreamer和dbus的python音頻播放器http://sourceforge.net/p/autoradiobc/code/210/tree/trunk/autoradio/autoplayer/player_gstreamer1.py 。 它可以與pygst一起使用,我想將其移植到gstreamer1。按照以下方法操作https://wiki.ubuntu.com/Novacut/GStreamer1.0,它可以工作,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'
在這部分代碼中:
try:
pos_int = self.player.query_position(Gst.Format.TIME, None)[0]
except(Gst.QueryError):
logging.warning( "Gst.QueryError in query_position" )
return None
我得到后繞過此問題:
if ret == Gst.State.CHANGE_FAILURE:
AttributeError: type object 'GstState' has no attribute 'CHANGE_FAILURE'
在這部分代碼中:
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.")
也繞過這個問題,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'
在這部分代碼中:
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)))
注釋掉element_state_get_name玩家將要工作...。
我如何將完整代碼遷移到gstreamer 1,而無需繞過損壞的代碼?
我找不到有關QueryError的第一個問題的解決方案
但是:
if ret == Gst.State.CHANGE_FAILURE:
成為:
if ret == Gst.StateChangeReturn.FAILURE:
和:
Gst.element_state_get_name(old_state)
成為:
Gst.Element.state_get_name(old_state)
和:
self.player.set_new_stream_time(0L)
成為:
self.player.set_start_time(0L)
和:
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)
成為:
event = Gst.Event.new_seek(1.0, Gst.Format.TIME,
Gst.SeekFlags.FLUSH|Gst.SeekFlags.ACCURATE,
Gst.SeekType.SET, tnano, Gst.SeekType.NONE, 0)
和:
pos_int = self.player.query_duration(Gst.Format.TIME, None)[0]
成為:
pos_int = self.player.query_duration(Gst.Format.TIME)[1]
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