[mythtv] Getting started with the OpenGL video renderer

[Andrei Tanas]

> > VideoOutputXv: Desired video renderer 'opengl' not available.
> > codec 'MPEG2' makes 'xv-blit,xshm,xlib,' available, using 'xv-blit'
> > instead.
> >
> > What am I missing? Output of `glxgears -info` follows this e-mail.
> 
> The rpm's are probably not built with --enable-opengl-video

This brings out another point - why does globalsettings.cpp show all
"possible" video renderers, not just those that are compiled in? In the
MinGW port I tried to change that but it got rejected. It's kind of
confusing to see OpenGL renderer option when it's not really there or to see
all xv/xshm etc options on Windows.