[mythtv] Mythtranscode .mpg => .mpg not .mpg => .nuv

[Cory Papenfuss]

> It supports multiple-audio streams better now (Paul's example passes
> the validator).  It also should fix the problem Cory had (apparently
> the last frame is just a partial, which confused the tool).
>
Yay... Run works now, with the final line
Warning: partial frame found!
As I figured... extra-broken input.

> If anyone wants to give it further testing, that'd be great.
>
 	I've got another stream that I suspect is somewhat hosed.  Having 
not really played with the previous one much, I'm not quite sure that this 
is correct. 
Opening misc_family_and_airmotor.nuv
#0 PTS:36037 Delta: 0.000000ms queue: 64
#1 PTS:34381 Delta: 18.400000ms queue: 1
ptsIncrement: 3003 Frame #: 2
PTS discrepency: 20878 != 20859 on B-Type (3)
PTS discrepency: 32884 != 32871 on B-Type (7)
PTS discrepency: 44889 != 44883 on P-Type (11)
PTS discrepency: 53904 != 53892 on P-Type (14)
PTS discrepency: 62917 != 62901 on I-Type (2)
PTS discrepency: 65942 != 65904 on B-Type (3)
PTS discrepency: 80923 != 80919 on P-Type (8)
PTS discrepency: 86937 != 86925 on B-Type (10)
PTS discrepency: 92938 != 92931 on B-Type (12)
PTS discrepency: 95946 != 95934 on B-Type (13)

 	Seems reasonable, but I've got over 23,000 of these throughout a 
2-hour clip.  This indicates a manipulation of the PTS, not necessarily 
inserted frames, right?

-Cory

*************************************************************************
* Cory Papenfuss                                                        *
* Electrical Engineering candidate Ph.D. graduate student               *
* Virginia Polytechnic Institute and State University                   *
*************************************************************************