[mythtvnz] DVB-T -> SD Analog TV

[Steven Ellis]

On 10/05/2010, at 9:52 AM, Tortise wrote:

> ----- Original Message ----- 
> From: "Nick Rout" <nick.rout at gmail.com>
> To: "MythTV in NZ" <mythtvnz at lists.linuxnut.co.nz>
> Sent: Monday, May 10, 2010 9:27 AM
> Subject: Re: [mythtvnz] DVB-T -> SD Analog TV
> 
> 
> On Mon, May 10, 2010 at 8:59 AM, Graeme Woollett <g.woollett at irl.cri.nz> wrote:
>> I'm setting up a mythbox for a friend that has an analog SD TV and a UHF
>> aerial - no SKY dish. Do nvidia cards output a SD representation of the
>> HD stream on their analog outputs ? Or am I destined to erect a sat dish?
> 
>> The software (myth, mplayer etc) scale to the available output, so you
> can certainly do what you suggest.
> 
> I agree.  The SD TV should display a picture at least as good as its tuned SD offering.
> 
> A little tangential however I have noted that playing HD over nvidia cards into "old" crt monitors e.g. 17" 1024x768 "max" 
> definition gives quite remarkably good results, far in excess of a 1024 x 786 pixellated performance.  (Although probably not quite 
> true HD still very good)
> 
> My presumption here is that this is because the CRT's are analogue - and therefore the dots are in reality more of a continuous 
> stream rather than the more modern dot basis gives a much better quality of display.  (The obvious parallel is the analogue disc 
> audio recordings vs digital)
> 
> It was interesting that old technology married to some newer technology is surprisingly good.   Anyone else noted this? 

I've done a lot of playback of HD streams over Composite or S-Video connections for customers and video quality is generally very good.

Don't set the video about 1024x768 and for some screens it looks better at 800x600.

You'll also need to play with the overscan options on the nvidia-settings tool as appropriate for your screen.

Steve

Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz

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