[mythtv] tracked down problems with fast-forward with pvr-350

[Ethan Sommer]

So, I found that if I comment out the contents of 
VideoOutputIvtv::ProcessFrame(), I can fastforward, rewind, skip 
commercials, etc. (it breaks a few other things, like OSD which I 
expected, and exiting playing the video which I didn't expect...)

I could live without the OSD, but since it breaks more than that, I 
wouldn't suggest my "patch" to others. So anyway, the problem is, I 
_think_ that you can't just throw the OSD on top of a frame in an mpeg 
stream (but you can when its paused) and the decoder is getting 
confused. So, either mythtv needs to not display the OSD when the video 
is moving, or it needs to do "clever mpeg stuff" to properly put the OSD 
on, and then take it off when it should be gone.

I _might_ be able to track down why I can't exit the video playback 
(hitting esc doesn't work) and turn OSD off all together, but it would 
be nice if we could have OSD _and_ working doFastForward....

Ethan