[mythtv] mythtv-vid branch needs testing

[Asher]

What's the best way of trying to get rid of tearing?  I'm seeing a lot
with opengl SD content.  Also when there are a lot of cuts the image
seems to flicker, like it shows one frame of the new scene, then one
of the old, and then back, although I don't know if that is what is
happening, it just seems to flicker.

Let me know what settings to try or what to look at in logs and I'll
try to get some better information