[pitivi: 90/94] ui: Do not show preset when some gst elements are missing

[Thibault Saunier <tsaunier src gnome org>]

commit 07daa6417a325e8680cdde48b9b5268d4e8ad9a4
Author: Thibault Saunier <thibault saunier collabora com>
Date:   Sat Sep 10 16:49:20 2011 -0300

    ui: Do not show preset when some gst elements are missing

 pitivi/ui/preset.py |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/ui/preset.py b/pitivi/ui/preset.py
index fa3e694..a892722 100644
--- a/pitivi/ui/preset.py
+++ b/pitivi/ui/preset.py
@@ -25,6 +25,8 @@ import os.path
 import gst
 import gtk
 
+from pitivi.encode import available_muxers, available_video_encoders, \
+     available_audio_encoders
 from pitivi.settings import xdg_data_home
 from pitivi.utils import isWritable
 from pitivi.configure import get_data_dir, get_renderpresets_dir, \
@@ -373,6 +375,12 @@ class RenderPresetManager(PresetManager):
         acodec = parser["acodec"]
         vcodec = parser["vcodec"]
 
+        if (acodec not in [fact.get_name() for fact in available_audio_encoders()] or
+            vcodec not in [fact.get_name() for fact in available_video_encoders()] or
+            container not in [fact.get_name() for fact in available_muxers()]):
+
+            return
+
         try:
             width = parser["width"]
             height = parser["height"]