From Laurens Voerman,"the current ReaderWriterJP2 has all the code for writing jp2 files (jpeg 2000), but the writing fails on my windows machine (jasper-1.900.1) because the ID for the "jp2" extention is requested before the jas_init() call. (bug introduced in svn 7645 - 10 dec 2007)"

src/osgPlugins/jp2/ReaderWriterJP2.cpp

@@ -179,9 +179,11 @@ class ReaderWriterJP2 : public osgDB::ReaderWriter
         
             // little dance here to get around warnings created by jas_image_strtofmt use of char* rather than const char*
             // as a parameted and modern compilers deprecating "jp2" string being treated as char*.
+            jas_init();//jas_image_strtofmt() bound to return -1 if jas_init has not been called.
             char* jp2 = strdup("jp2");
             _fmt_jp2 = jas_image_strtofmt(jp2);
             free(jp2);
+            jas_image_clearfmts();
         }
 
         virtual const char* className() const { return "RGB Image Reader/Writer"; }