Transcoding problem for rmvb file

I have problems to play transcoded rmvb file on rasplex. Originally I think it is the problem of server side. So I reported in the plex forum, here is the link(http://forums.plexapp.com/index.php/topic/68041-why-the-frame-rate-for-rmvb-transcoding-is-always-12fps-instead-of-24fps/). The answer from plex is that this is the problem of client. They are updating their client on different platform to use new transcoder. I am wondering if rasplex will transfer to the new transcoder or not.

It seems nobody has the same problem. Then could anyone give me any idea how to fix the problem.