[vdr] Re: Suggestions for tv output?

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

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
>
>
>
>
> -- 
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>



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