trouble with grayscale

[ch7787]

Hi,
I am traying to play a stream with vlc in grayscale like this
vlc --grayscale rtsp://localhost:1234/bar
however the colors information is always coded. the video is never in grayscale !!!
I realy need to active the grayscale option so any information that can help is welcome
Thanks.

[VLC_help]

http://trac.videolan.org/vlc/ticket/3293

[ch7787]

thanks so much.
That was a big help