[mythtv] [PATCH] Enable decoding of more mpeg-ts streams for pcHDTV

Isaac Richards ijr at po.cwru.edu
Thu Oct 2 12:49:38 EDT 2003


On Thursday 02 October 2003 06:40 am, Doug Larrick wrote:
> There will also need to be some work in the backend (recorder) to
> select a subchannel out of the MPEG-TS stream for multicast stations
> (like PBS in my area) -- this will have the advantage of stripping out
> the TS overhead (thus smaller files) even for full-bandwidth content.
> This step may be the place to try to do error control on corrupted
> packets.

Probably can take a look at DVB code (in mythtv and elsewhere) for stuff like 
that, I'd think..

> It'd also be nice to have some funky zoom modes.  Besides the normal
> matching of aspect ratio with display device, there are some truly
> horrific offenses taking place right now -- there are some shows (like
> Star Trek: Enterprise) that are (a) shot in letterbox format (16:9),
> (b) sent from the network as a standard-def 4:3 program (so black bars
> top & bottom for everybody), then (c) upconverted by my local station
> into 16:9 hi-def (so black bars left & right for all HDTV viewers),
> then (d) displayed on my 4:3 computer monitor (so additional black bars
> top & bottom).  So the show winds up tiny, centered on the screen.
> Ugly!

Zooming stuff really isn't that difficult, software wise, as long as you're 
doing just plain zooming.  It's just a matter of changing what part of the 
video you're telling it to display, Xv (or XvMC) does all the rest of the 
work.  If you wanted to do the funky stretch 4:3 -> 16:9 modes where the 
sides are stretched and the center isn't, that'd take CPU power, though.

Isaac


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