[vdr] Re: Suggestions for tv output?

[Marko Myllymäki <marko.myllymaki@sci.fi>]

Hi Dylan,

Using any TV-encoder chip will decrease the quality of video output as it
makes one Digital to Analog conversion too much and not many cards have even
proper RGB output on it, which is analog signal. RGB it self is far better
then CVBS or Composite video.

Before I by a DVI capable videocard i will try to set my G200 video output
to such, which is acceptable as PAL signal and convert the monitor output
sync-signals to acceptable on TV/beamer, by combiling them (Simple circuit).

The best quality is get by using digital signal from end-to-end, where
beamer creates the analog video (light ;) ).

Br.
Marko Myllymäki.

----- Original Message ----- 
From: "Dylan D" <dylan@ozforces.com.au>
To: <vdr@linuxtv.org>
Sent: Tuesday, January 06, 2004 3:53 PM
Subject: [vdr] Re: Suggestions for tv output?


> Id like to add recently the specs on the
> http://www.s3graphics.com/index.html
> where released which are apparently going to be used for video output for
> the new 'VIA console'
> And it has similar specs to the cx25870/16 Connxant chipset.
>
> I'd like to see some sort of 'standard' for HW specs of tv output the
> problem is many video cards use different Chipsets for different Cards. so
> standards as i see it is a problem...
>
> Dylan D.
> ----- Original Message ----- 
> From: "Marko Myllymäki" <marko.myllymaki@sci.fi>
> To: <vdr@linuxtv.org>
> Sent: Tuesday, January 06, 2004 11:47 PM
> Subject: [vdr] Re: Suggestions for tv output?
>
>
> > Hi,
> >
> > Sorry if I sound like a total ass by saying this, but should it not be
the
> > hardware, which does the resizing to the video stream?
> >
> > Should we try to find a most direct way of doing things, which could be
> used
> > on most HW solutions out there?
> >
> > So if for example softdevice uses 1280x720 resolution all the time and
> > directs Directfb to do the resize according to stream it should provide
> > better quality as there is less decoding/encoding phases and with out
> > kick-ass CPU?
> >
> > Possible HW resize method:
> > Stream from DVB-x -> demux -> (Softdevice -> decode -> DirectFB with
> > instructions to resize according to parameters set by Softdevice) and
> result
> > is on screen.
> >
> > SW resize Method:
> > Stream from DVB-x -> demux -> decode ->  resize -> encode to MPEG-2
(does
> > xine take unencoded video in?) -> xine -> decode -> fbxine?
> >
> > Br.
> > Marko Myllymäki
> >
> > ----- Original Message ----- 
> > From: "Reinhard Nissl" <rnissl@gmx.de>
> > To: <vdr@linuxtv.org>
> > Sent: Tuesday, January 06, 2004 12:48 AM
> > Subject: [vdr] Re: Suggestions for tv output?
> >
> >
> > > Hi,
> > >
> > > ˙so-8859-1?B?SORt5GzkaW5lbiBKb3Jp?˙jori.hamalainen@teliasonera.com>
> wrote:
> > > >>So for for 'tv-output' i've either gotta go mpeg decoder or
> > > >>tv-out card. Qualty is a big concern with me( the reason why
> > > >>I bought a plasma screen, and went digital) I'd like to know
> > > >>what people would recommend for best picture output, I'm
> > > >>talking on a widescreen 16:9 1'm tv here.
> > > >
> > > > I think the best available option will be DVI-D -based output.
> > > > And use VDR with softdevice-plugin. Or perhaps KVDR might work.
> > >
> > > My Matrox G550 is dual headed and has one DVI and one VGA connector.
> > >
> > > > I can compare same recording on DVB-cards composite output (CVBS)
> > > > vs. Mplayer output via DVI and must say that the difference is huge.
> > >
> > > [ snip ]
> > >
> > > > My goal is to run HDTV 720p mode (1280x720) all the time and let
> > > > software output DVB-picture to it in correct aspect ratios and
> > > > via de-interlacing (tvtime / dscaler type of software).
> > >
> > > My Intel Pentium 2.8 GHz HT CPU can decode, scale and deinterlace a
> > 1920x1088
> > > HDTV 1080i stream (Euro1080) to a size of 960x544 with a maximum CPU
> load
> > of
> > > 70 % (most of the time about 60 %). Kernel 2.6.0 performs even better,
> due
> > to
> > > less peak loads on the two virtual processors. So I think, native HDTV
> > 720p
> > > mode should be possible with such a machine, using my vdr-xine plugin
> with
> > > xine / fbxine.
> > >
> > > Bye.
> > > -- 
> > > Dipl.-Inform. (FH) Reinhard Nissl
> > > mailto:rnissl@gmx.de
> > >
> > >
> > >
> > >
> > > -- 
> > > Info:
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vdr"
> > as subject.
> > >
> >
> >
> >
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> >
> >
>
>
>
> -- 
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