If hideOSD=TRUE is passed to TIDmaiVideoSink, the OSD is opened, initialized,and
made transparent so it doesn't interfere with video playback. This is
especially useful when fbcon is enabled in the kernel -- TIDmaiVideo sink will
make sure the fbcon is hidden when displaying video.
If this property is used, it should eliminate the need to run commands like:
cat /dev/zero > /dev/fb2 2> /dev/null
To clear the fb attribute window after booting.