glcolorscale does not work properly (green video)

[Yaroslav Andrusyak]

I am trying use glcolorscale instead of videoconvert for RGB>YUV conversion.
The result is a green video, gst and plugins  - current git 06.11.14
intel i5 3330
hd 2500
Mesa-git

gst-launch-1.0 -e ximagesrc display-name=:0 use-damage=0 ! queue !
video/x-raw,format=BGRx ! glcolorscale !
video/x-raw,format=I420,framerate=30/1 ! queue  ! vaapiencode_h264 !
vaapiparse_h264 ! multiqueue ! matroskamux name=muxer muxer. !
progressreport name=Rec_time ! filesink
location=/disk/tmp//rec_2014-11-06_181200.mkv
Setting pipeline to PAUSED ...
libva info: VA-API version 0.36.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_36
libva info: va_openDriver() returns 0
Pipeline is live and does not need PREROLL ...
Got context from element 'vaapiencodeh264-0': gst.vaapi.Display=context,
display=(GstVaapiDisplay)NULL;
Got context from element 'glcolorscale0': gst.gl.GLDisplay=context,
gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayX11\)\ gldisplayx11-0";
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
Rec_time (00:00:05): 4 seconds
Rec_time (00:00:10): 9 seconds
Rec_time (00:00:15): 14 seconds
Rec_time (00:00:20): 19 seconds
Rec_time (00:00:25): 24 seconds
Rec_time (00:00:30): 29 seconds
Rec_time (00:00:35): 34 seconds
Rec_time (00:00:40): 39 seconds
Rec_time (00:00:45): 44 seconds
Rec_time (00:00:50): 49 seconds
Rec_time (00:00:55): 54 seconds
Rec_time (00:01:00): 59 seconds
^Chandling interrupt.
Interrupt: Stopping pipeline ...
EOS on shutdown enabled -- Forcing EOS on the pipeline
Waiting for EOS...
Rec_time (00:01:02): 61 seconds
Got EOS from element "pipeline0".
EOS received - stopping pipeline...
Execution ended after 0:01:01.676521183
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
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