[mythtv-users] What format to output - 480i/720p/1080i

[Steven Adeff]

On 5/22/07, Matt <skd5aner at gmail.com> wrote:
> On 5/21/07, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> > On 5/21/07, Matt <skd5aner at gmail.com> wrote:
> > > Hi!
> > >
> > >    I recently got me a nice HD plasma.  In addition, I'm not recording
> > > some HD content over QAM, both 720p and 1080i.  The plasma's native
> > > resolution is: 1360x768/60Hz.
> > >
> > > 90% of my content is SD - 480i
> > > 10% is a mix of 720p and 1080i.
> > >
> > > My cable box will output whatever the original source content is.
> > > That allows the TV to scale and deinterlace, which it was built to do.
> > >  However, I believe I can only output one resolution from my video
> > > card.  Is there anyway for mythtv and/or xorg to output the native
> > > resolution of the recording and let the television handle the scaling
> > > and deinterlacing?
> > >
> > > I'm using a component adapter from my video card into the my TV.  I
> > > can also use HDMI/DVI or VGA, but I prefer not to use VGA because the
> > > TV doesn't have as many picture controls for that input.  The reason
> > > I'm not using DVI, is because you can't get the true native resolution
> > > over it, here's what you can get over the HDMI ports:
> > >
> > > 1920x1080i at 59.94/60 Hz
> > > 720x480p at 59.94/60 Hz
> > > 1280x720p at 59.94/60 Hz
> > > 720(1440)x480i at 59.94/60 Hz
> > > 1920x1080p at 24 Hz
> > >
> > > So, how should I output the video?  Obviously it's a progressive
> > > display, but I've noticed that some of my interlaced material could
> > > look better than the deinterlacing myth is providing.  Any thoughts?
> >
> > with XRandR Myth can output any number of resolutions and change them
> > based on the content played back. I'd suggest setting up a 720p and
> > 1080i modeline that work with your TV as well as one at it's native
> > resolution. Have the menu system setup to use the native res and have
> > it output TV at the recorded resolution. I'd recommend native for 480i
> > content.
> >
>
> Thanks Steve.  Is this documented anywhere?  I must admit that I
> haven't looked hard, but I didn't find anything on the wiki.  I did
> find various references, but nothing that really lays out the details.
>  I appreciate the help - this sounds pretty much exactly what I'm
> looking to do!  Do a lot of people use xrandr?  I'm assuming they're
> using a dedicated resolution.

i think just in searching this list you'll find i've given that advice
a few times.

xrandr is a standard part of the newer Xorg versions. Many MythTV
users use it for both HDTV and SD.

-- 
Steve
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