libvlc Teletext appers transparent

[BoDan]

The methods to set teletext:
libvlc_video_set_teletext ( .. )
libvlc_toggle_teletext ()
do show the teletext tranparent over the running tv program.

However i would like the teletext to appear on solid gound for better readability.
Is there a method in libvlc to set the background to intransparent like the VLC Gui does?
(See also bug report #18135)
Testet with the latest nightly build on windows 7

Help is appreciated.