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

[Matt]

On 5/23/07, jedi at mishnet.org <jedi at mishnet.org> wrote:
> > 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.
>
> Why would something "new" be required for this? Applications have
> been able to switch the current physical resolution of X for years.
> You just need to have appropriate modelines in your config file.
>
>
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Can someone post their xorg.conf file who is using xrandr to switch
between 480i, 720p, and 1080i (etc)?

Thanks!
Matt