[mythtv] 4:3 content on 16:9 HDTV & Black bars - revisited

[Moasat]

> -----Original Message-----
> From: mythtv-dev-bounces at mythtv.org 
> [mailto:mythtv-dev-bounces at mythtv.org] On Behalf Of Isaac Richards
> Sent: Tuesday, September 14, 2004 6:25 PM
> To: Development of mythtv
> Subject: Re: [mythtv] 4:3 content on 16:9 HDTV & Black bars - 
> revisited
> 
> On Tuesday 14 September 2004 07:06 pm, Moasat wrote:
> > I've done a version of a non-linear horizontal image 
> scaling function 
> > that would stretch the edges of the video to the edge of the TV but 
> > keep the center more or less at 1-to-1.  My Hitachi HDTV 
> has this mode 
> > built-in, as do many other HDTV's I imagine.  The problem with the 
> > code right now is that it is written in C and only has MMX code for 
> > Intel assembly syntax and I assume it needs to be AT&T 
> assembly.  The 
> > C code would most likely not be fast enough, even on the fastest 
> > systems right now.  If someone would like to convert it, I 
> could make 
> > it available.  Otherwise, I'll continue to work on 
> converting it to AT&T.
> >
> > Besides that, I currently have no idea how it would get integrated 
> > into MythTV or MythVideo.  I planned to jump off that 
> bridge when I got to it.
> 
> If your TV has the mode built in, why not simply send 4:3 
> content and let your TV stretch it?
> 
> Isaac
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> 

I haven't worked out the optimum setup yet but with a modeline of 960x540, I
get a great looking picture but my TV locks into widescreen and the
smooth-wide mode is not an option any longer so I end up with black bars
when watching 4:3 content.  Not that I understand why but I've been warned
not to leave the black bars on the screen for more than about 10% of the
viewing time or burn-in will occur.  I kind of figured that sort of thing
wouldn't happen with newer TVs but I'm not an engineer so I'm taking other
people's word for it.  For my setup though, I figured a software version of
the smooth-wide mode in Myth would solve the problem for me.