From Laurens Voerman, "I crashed osgconv while compressing textures:

osgconv --compressed-dxt1 cow.osg cow.ive

due to different handling of the extentions in osg 3.4 and up.

attached is a zip with the files:

OpenSceneGraph\applications\osgconv\osgconv.cpp



This file is valid for svn branch and stable3.4."



git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@15124 16af8721-9629-0410-8352-f15c8da7e697

applications/osgconv/osgconv.cpp

@@ -157,6 +157,7 @@ public:
         }
 
         osg::ref_ptr<osg::State> state = new osg::State;
+        state->initializeExtensionProcs();
 
         for(TextureSet::iterator itr=_textureSet.begin();
             itr!=_textureSet.end();