[mythtv] DVD Autoclipping

[Matt Cheely]

I've been working on some code to do automatic cropping in dvds for 
mythdvd using transcode's autoclip filter. I'm doing this for a couple 
of reasons. 1) Letterbox detection seems brokeish 2) I've seen some dvds 
of films that have wierd aspect ratios where letterbox detection would 
likely leave empty space somewhere (mostly older/foriegn films).
The first thing I wanted to ask is: Is this something anybody other than 
me is going to be interested in using?

Secondly, it occured to me while working through the code that since we 
know the dvd resolution and aspect ratio, we can compute resize/PAR 
(pixel aspect ratio) paramters in mythdvd/mtd, so why have a separate 
set of transcoding profiles for each dvd type? Why not just have 
profiles that get applied uniformly across dvd types where the user just 
chooses to stretch or shrink to get the proper aspect ratio? It seems 
like that would simplify things a bit, and allow transcode profile 
configuration to be opened up to the user in a not-too-confusing fashion.