I didn't know anyone was still commenting on this thread! Sorry guys, never tried subscribing to the thread....

Anyway, I just posted this on Stack Overflow on my original question. I need to clean up the code before posting in full, but I think the important bits are here. Let me know if this still isn't working for you all.



self.cameraWindow = QtGui.QWidget(self)
self.cameraWindow.setGeometry(QtCore.QRect(530, 20, 256, 192))
self.cameraWindow.setObjectName("cameraWindow")
self.cameraWindow.setAttribute(0, 1); # AA_ImmediateWidgetCreation == 0
self.cameraWindow.setAttribute(3, 1); # AA_NativeWindow == 3

global wId
wId = self.cameraWindow.winId()

self.camera = Vid(wId)

self.camera.startPrev()

class Vid:
def __init__(self, windowId):
self.player = gst.Pipeline("player")
self.source = gst.element_factory_make("v4l2src", "vsource")
self.sink = gst.element_factory_make("autovideosink", "outsink")
self.source.set_property("device", "/dev/video0")
#self.scaler = gst.element_factory_make("videoscale", "vscale")
self.fvidscale = gst.element_factory_make("videoscale", "fvidscale")
self.fvidscale_cap = gst.element_factory_make("capsfilter", "fvidscale_cap")
self.fvidscale_cap.set_property('caps', gst.caps_from_string('video/x-raw-yuv, width=256, height=192'))
self.window_id = None
self.windowId = windowId
print windowId

self.player.add(self.source, self.fvidscale, self.fvidscale_cap, self.sink)
gst.element_link_many(self.source,self.fvidscale, self.fvidscale_cap, self.sink)

bus = self.player.get_bus()
bus.add_signal_watch()
bus.enable_sync_message_emission()
bus.connect("message", self.on_message)
bus.connect("sync-message::element", self.on_sync_message)

def on_message(self, bus, message):
t = message.type
if t == gst.MESSAGE_EOS:
self.player.set_state(gst.STATE_NULL)
elif t == gst.MESSAGE_ERROR:
err, debug = message.parse_error()
print "Error: %s" % err, debug
self.player.set_state(gst.STATE_NULL)

def on_sync_message(self, bus, message):
if message.structure is None:
return
message_name = message.structure.get_name()
if message_name == "prepare-xwindow-id":
win_id = self.windowId
assert win_id
imagesink = message.src
imagesink.set_property("force-aspect-ratio", True)
imagesink.set_xwindow_id(win_id)
def startPrev(self):
self.player.set_state(gst.STATE_PLAYING)
def pausePrev(self):
self.player.set_state(gst.STATE_NULL)