how to change the background color of xine osd or set osd transparent ?

hi list !
how to change the background color of xine osd ? is it possible to set osd's 
background transparent ? by default its green and really ugly.

os : openSUSE 13.1 64bit
KDE:4.11.5
currently i use kaffeine with libxine2
Information for package libxine2:
---------------------------------
Repository: packman
Name: libxine2
Version: 1.2.5-90.5
Arch: x86_64
Vendor: http://packman.links2linux.de
Installed: Yes
Status: up-to-date
Installed Size: 5.6 MiB
Summary: Video Player with Plug-Ins

but i found the same thing while running `xine videofile.ext`

this is my snapshot

http://tof.canardpc.com/view/a8db2523-4acf-47d1-a473-7f8a7ee6149a.jpg


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