[pitivi] SourceFactory: Make sure video elements reach the proper state befor using them.

[Edward Hervey <edwardrv src gnome org>]

commit 836e1ec382e3847506ed46f2be66c81b712b1d8f
Author: Edward Hervey <bilboed bilboed com>
Date:   Sat Aug 29 12:09:42 2009 +0200

    SourceFactory: Make sure video elements reach the proper state befor using them.

 pitivi/factories/base.py |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/factories/base.py b/pitivi/factories/base.py
index df2f791..d322a72 100644
--- a/pitivi/factories/base.py
+++ b/pitivi/factories/base.py
@@ -390,6 +390,9 @@ class SourceFactory(ObjectFactory):
             pad.link(topbin.aconv.get_pad("sink"))
             topbin.ghostpad = gst.GhostPad("src", topbin.volume.get_pad("src"))
         elif hasattr(topbin, "alpha"):
+            for element in [topbin.queue, topbin.csp, topbin.alpha]:
+                element.sync_state_with_parent()
+
             pad.link(topbin.queue.get_pad("sink"))
             topbin.ghostpad = gst.GhostPad("src", topbin.alpha.get_pad("src"))
         else: