From Gideon May, "I've added an alias for the new mpeg 4 format used by quicktime and

podcasts."

src/osgDB/Registry.cpp

@@ -166,6 +166,7 @@ Registry::Registry()
     addFileExtensionAlias("mpv",  "qt");
     addFileExtensionAlias("dv",   "qt");
     addFileExtensionAlias("mp4",   "qt");
+    addFileExtensionAlias("m4v",   "qt");
 #else
     addFileExtensionAlias("jpg",  "jpeg");
     addFileExtensionAlias("jpe",  "jpeg");

src/osgPlugins/quicktime/ReaderWriterQT.cpp

@@ -37,6 +37,7 @@ class ReaderWriterQT : public osgDB::ReaderWriter
                    osgDB::equalCaseInsensitive(extension,"mpg") ||
                    osgDB::equalCaseInsensitive(extension,"mpv") ||
                    osgDB::equalCaseInsensitive(extension,"mp4") ||
+                   osgDB::equalCaseInsensitive(extension,"m4v") ||
                    osgDB::equalCaseInsensitive(extension,"dv");
         }