How to make use of libomx_avcdec_sharedlibrary.so

All,

I downloaded the Android For OMAP3 with Gstreamer Integration from
http://labs.embinux.org/index.php/Android_For_OMAP3_with_Gstreamer_Integration
and build it as per the instructions.
Can anybody tell me -
1.what to do to decode the H.264 Video using
libomx_avcdec_sharedlibrary.so present in the RFS/system/lib.
Currently if I play the H.264 video I am sure it does not use the
libomx_avcdec_sharedlibrary.so, as the video is played even if I
delete the libomx_avcdec_sharedlibrary.so? I don't know how the H.264
video is being played in absence of libomx_avcdec_sharedlibrary.so!

Moreover my libomx_avcdec_sharedlibrary.so has my company logo, I
could not see in the video?

2.I want the video as full screen.and not rotated by 90 degree. How to
do it ?

Regards,
Sanjeev Kumar Verma