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定义的GStreamer视频窗口中使用的Gstreamer“playbin”在Python中“set_window_handle”代码告诉的Gstreamer在窗口ID来呈现视频：问题上Raspbian
这个工作在标准Linux的伴侣，并在树莓派3运行Ubuntu-Mate。然而，运行在相同的Raspberry上但运行最新的Raspbian操作系统，Gstreamer完全忽略了在特定窗口中运行的指令，而是创建了自己的窗口，在屏幕中间出现。
如果新窗口能够被操纵，移动和/或调整大小，但不能这样做，那么这不成问题。它不能移动，不能关闭，鼠标指针消失。
有谁知道这是Raspbian，X windows还是Gstreamer中的一个bug，还是我没有发现为了在Raspbian OS上工作而必须实施的一些改变？
这是一个最小的工作示例，它说明了上述行为。
#!/usr/bin/env python
import os,time
import wx
import gi
gi.require_version('Gst', '1.0')
gi.require_version('GstVideo', '1.0')
from gi.repository import Gst
from gi.repository import GstVideo
class Player(wx.App):
def OnInit(self):
window = wx.Frame(None)
window.SetTitle("Gstreamer Player Test")
window.SetSize((-1,-1))
window.Bind(wx.EVT_CLOSE,self.close)
vbox = wx.BoxSizer(wx.VERTICAL)
hbox = wx.BoxSizer(wx.HORIZONTAL)
self.fileid = wx.TextCtrl(window,style=wx.TE_PROCESS_ENTER)
self.fileid.SetToolTipString("Enter full path to media file")
hbox.Add(self.fileid, 1)
self.start = wx.Button(window,label="Start")
hbox.Add(self.start, 0)
self.start.Bind(wx.EVT_BUTTON, self.control)
self.fileid.Bind(wx.EVT_TEXT_ENTER, self.control)
vbox.Add(hbox, 0, wx.EXPAND, 0)
self.video_window = wx.Panel(window)
vbox.Add(self.video_window,1,wx.EXPAND,5)
window.SetSizer(vbox)
window.Layout()
window.Show()
self.SetTopWindow(window)
Gst.init(None) #initialise gstreamer
self.player = Gst.ElementFactory.make("playbin", "player")
bus = self.player.get_bus()
bus.add_signal_watch() #hook up bus to signals from gstreamer
bus.enable_sync_message_emission()
bus.connect('message', self.on_message)
bus.connect('sync-message::element', self.on_sync_message)
return True
def control(self, event):
if self.start.GetLabel() == "Start":
fileid = self.fileid.GetValue()
if os.path.exists(fileid):
self.start.SetLabel("Stop")
fileid = "file://"+unicode(fileid)
self.player.set_property('uri', fileid)
self.player.set_state(Gst.State.PLAYING)
else:
print "File error - No such file"
else:
self.player.set_state(Gst.State.NULL)
self.start.SetLabel("Start")
def on_message(self, bus, message):
t = message.type
if t == Gst.MessageType.EOS: # media has ended
self.player.set_state(Gst.State.NULL)
self.button.SetLabel("Start")
elif t == Gst.MessageType.ERROR:
print "Player error"
self.player.set_state(Gst.State.NULL)
self.start.SetLabel("Start")
def on_sync_message(self, bus, message):
if message.get_structure() is None:
return True
message_name = message.get_structure().get_name()
if message_name == 'prepare-window-handle': #Assign the window id to display in
imagesink = message.src
imagesink.set_property('force-aspect-ratio', True) #Force size to fit window
X_id = self.video_window.GetHandle()
print ("Window Id:", X_id)
imagesink.set_window_handle(X_id)
return True
def close(self,event):
self.player.set_state(Gst.State.NULL)
time.sleep(0.1) #Allow a little time to reach Null state
event.Skip()
app = Player()
app.MainLoop()