When distinguishing MediaFormats, takes into account their clock rate as well because the encoding String isn't unique.

src/net/java/sip/communicator/impl/neomedia/codec/EncodingConfiguration.java

@@ -567,8 +567,8 @@ private int compareEncodingPreferences(MediaFormat enc1, MediaFormat enc2)
         if (res == 0)
         {
             res = enc1.getEncoding().compareTo(enc2.getEncoding());
-//            if (res == 0)
-//                res = Double.compare(enc1.getClockRate(), enc2.getClockRate());
+            if (res == 0)
+                res = Double.compare(enc1.getClockRate(), enc2.getClockRate());
         }
         return res;
     }