[MPlayer-users] Is S-Video and external monitor limited by laptop's graphics card's max resolution.

Reshat Sabiq sabiq at csociety.org
Sun Aug 28 05:02:19 CEST 2005

Reshat Sabiq wrote:

> Reshat Sabiq wrote:
>> Looks like it's all covered at:
>> http://www.michaeldvd.com.au/Articles/PALvsNTSC/PALvsNTSC.asp
>> So then i'm making the following conclusions (please correct me if 
>> i'm wrong):
>> 1. both 1024x768 max resolution laptop and 1280x768 one will have the 
>> same quality of playback via S-Video, and in fact resolutions are 
>> irrelevant, as Reimar said, and all modern resolutions would have the 
>> same playback.
>> 2. a (DVD) stream played back on a computer monitor (VGA or LCD) from 
>> a computer will be higher quality than the same stream played back 
>> via S-Video, because more pixels will be used for rendering
>> 3. a laptop with max resolution of 1024x768 would be able to play a 
>> wide screen DVD on a "16:9" VGA (e.g., at 1280x768)
>> Thanks.
> I think answer to 1 is Yes.
> On 2., there probably won't be any different between a comparable TV + 
> S-Video, or a monitor, since the TV will have larger pixels, and a 
> monitor would scale a pixel to more than 1. Though i don't exactly 
> understand what happens if, say, horizontal resolution is not a 
> multiple of 720. I guess some pixels get rendered more than once and 
> some don't.

I read up a little:
Actually, a comparable LCD or VGA  monitor would probably be more 
accurate than S-Video on a TV, because S-Video would merge B-Y and R-Y 
signals into one signal C. Plus, the green signal which was implied in 
Y, B-Y, R-Y, will no longer be imliable in C. I don't know how exactly 
green is implied in Y, B-Y, R-Y, but that's what it says at:
So it's not about number of pixels, but the signal conversions involved 
in S-Video.
Does this mean, that it's not worth spending money on ensuring S-Video 
port in a laptop or PC (i've noticed a difference of up to several $100 
if one wants to ensure S-Video port in a laptop)? E.g., i don't have any 
TV right now, and will be buying an HDTV eventually. Many HDTVs 
(monitors at least) have PC in, so a laptop or PC that has a VGA 
connector would ensure better playback than when S-Video is used with 
the same HDTVs, correct?

P.S. There are also cables that convert from VGA to component video:
Would these converters (from VGA to component video) make the playback 
any better in comparison to using a regular VGA cable to directly hook 
up the regular VGA connector from a computer to, say, HDTV (monitor or 
TV)? My guess is they would not. They'd only be useful for hardware that 
doesn't have compatible ports.
P.P.S. Sorry, for all the questions. But i already learned a lot. And 
looks like knowing such things can save quite a bit when buying 
computers or (HD)TVs.

> On 3., i made a typo, 1280x768 is not 16:9, i meant to say 1280x720. 
> I'm pretty sure the answer is yes, although not all of external VGA or 
> LCD resolutions might be supported. So i guess the answer is 75% 
> chance yes, 25% No, or something like that.

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