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

[Jason Schloer]

I was wondering if something like that could be accomplished with 3D
acceleration. Granted you'd be sending a huge amount of "texture data"
to the card, but say you did make the whole thing on large texture and
then mapped athe screen out as a bunch of triangles. Then the
accelerator can handle all the scaling, etc. Plus you could do funky non
linear scaling like some TVs do. Anyone have any thoughts? This isn't
something I have the skills to do at the moment, but was something I've
been curious about. 

Jason Schloer


-----Original Message-----
From: mythtv-dev-bounces at mythtv.org
[mailto:mythtv-dev-bounces at mythtv.org] On Behalf Of Isaac Richards
Sent: Thursday, October 02, 2003 11:50 AM
To: Development of mythtv
Subject: Re: [mythtv] [PATCH] Enable decoding of more mpeg-ts streams
forpcHDTV

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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