toxibunny
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Fri Sep 02, 2011 10:42 am

just curious...
note: I may or may not know what I'm talking about...

jamesh
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Fri Sep 02, 2011 10:49 am

Max of HDMI 1080p30, full colour.

I'm currently connected to a 1680x1050 @ 60 Hz monitor via a HMDI to DVI adapter with no problems.
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eggn1n3
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Fri Sep 02, 2011 10:53 am

I still have an LCD/TFT screen with VGA connector. I guess there is no such thing as HDMI to VGA adapter for PC's? I have seen some HDMI to VGA HD15 (http://www.amazon.com/HDMI-VGA.....B001OLCHJ6) but they seem not to work for PC's....

pieter
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Fri Sep 02, 2011 12:28 pm

DVI comes in multiple "flavors".
For example you have DVI-D(igital) and DVI-A(analog).
DVI-D is (almost) exactly the same as HDMI so a HDMI -> DVI cable is nothing more than 2 connectors and a few wires.

VGA is Analog so needs DVI-A. The R-Pi has HDMI which is DVI-D(igital).
To convert a Digital signal to an Analog signal you'll need a bit more than 2 connectors and a few wires. You'll need some electronics as well. This is wat make a DVI-D to VGA "cable" so expensive.

The frustrating part of a TFT screen with a VGA adapter is that inside the screen it has to convert the Analog VGA input signal back to a Digital signal to be able to display on the screen (TFT is digital).

toxibunny
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Fri Sep 02, 2011 1:05 pm

Thanks, James, I know it runs at 1080p using a HDMI TV, I was wanting to know about the rest... presumably because it's from phones, it does 840*400, and probably 320*240, but what else? and what modes are supported by the composite out?
note: I may or may not know what I'm talking about...

toxibunny
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 6:57 am

Bump! anyone know/know where I can find out?
note: I may or may not know what I'm talking about...

jamesh
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 8:29 am

I'll put it on my list of questions to find answers to - don't think the information is 'known' as yet.
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toxibunny
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 11:26 am

Thanks :)
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Sander
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 12:07 pm

Quote from eggn1n3 on September 2, 2011, 11:53
I still have an LCD/TFT screen with VGA connector. I guess there is no such thing as HDMI to VGA adapter for PC's? I have seen some HDMI to VGA HD15 (http://www.amazon.com/HDMI-VGA.....B001OLCHJ6) but they seem not to work for PC's....

Ouch ... good post: until your post I assumed that I could connect the RasPi to an old monitor (CRT or LCD) and have an el-cheapo computer for my sons. But, alas, old monitors have VGA, not HDMI or Composite. :?

So that means:
old TV (composite)
new TV (HDMI)
new monitor (HDMI)

Lakes
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 1:35 pm

You can get composite to VGA adapters, I bought one from ebay so I could monitor the output from my camcorder while recording.

Also if your Tv has a scart socket there is a composite input on that.

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Sander
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 4:06 pm

Quote from Lakes on September 5, 2011, 14:35
You can get composite to VGA adapters, I bought one from ebay so I could monitor the output from my camcorder while recording.

Also if your Tv has a scart socket there is a composite input on that.

Yes, I know, but those Composite->VGA-converters are more expensive than the RasPi itself (and ugly too). Better to invest in a new monitor then (or find an old monitor that has composite?)

The TV is no problem; it has all old connectors.

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liz
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 4:27 pm

We're aware that an awful lot of people want VGA - although it won't be possible for this iteration, it's something we have on the list (alongside WiFi, PoE etc) for things to try to fit in when we come to design a model C.

God. I don't even want to *think* about starting to design a model C.
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Michael
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 6:25 pm

A couple of options for VGA, without requiring a model C:

Firstly, the following *might* work. Beagleboard people have reported various levels of success (mainly "issues"):
http://www.hdfury.com/

Something similar:
http://blog.galemin.com/2011/0.....eboard-xm/

Alternatively, it may be possible to design an expansion board that plugs into the LCD headers on the R.Pi. Here is something similar for Beagleboard:
http://boardzoo.com/product_info12.php

yoonsikp
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 6:34 pm

Just wondering, cant you just use this (http://www.amazon.ca/HDMI-VGA-.....B003OE7UES) on the rpi. It only costs $9.00

Michael
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Sep 05, 2011 7:52 pm

Nope, that's VGA to HDMI, not HDMI to VGA. The HDMI connector on the Raspberry Pi only puts out digital signals, not analogue.

ErvKosch
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Tue Sep 06, 2011 2:02 pm

There are some cheap HD to VGA adapters. But those require that your screen resolution and refresh rates have to be very specific and your VGA monitor usually has to support some weird refresh rates. They're just cables with a couple of resistors and look pretty bad. The expensive ones have a chip in them for the conversion and require they're own power supplies. Great video but the price will negate the cost saving and size of the Ras-Pi.

yoonsikp
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Tue Sep 06, 2011 2:48 pm

Quote from ErvKosch on September 6, 2011, 15:02
There are some cheap HD to VGA adapters. But those require that your screen resolution and refresh rates have to be very specific and your VGA monitor usually has to support some weird refresh rates. They're just cables with a couple of resistors and look pretty bad. The expensive ones have a chip in them for the conversion and require they're own power supplies. Great video but the price will negate the cost saving and size of the Ras-Pi.
When you say cheap, how much do you mean? Under 30 dollars?

toxibunny
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Tue Sep 06, 2011 5:52 pm

The 'just a cable' thing won't work. you really do need a converter. It's been discussed in multiple threads already...
note: I may or may not know what I'm talking about...

toxibunny
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Tue Sep 06, 2011 5:53 pm

Personally, I'm thinking of going for a proper converter. I've seen them for a shade under 50 dollars, and I'll be able to use it with the wii and ps3, too.

...Which is kindof why I started this thread. If the Raspi can't do 1024*768, then that'll suck for plugging it into my projector. Same if it doesn't do anamorphic widescreen (and no under/overscan) via the composite out for my TV...

I'm pretty sure it'll do both of those, mind. it's a modern device...
note: I may or may not know what I'm talking about...

Bacan
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Nov 07, 2011 10:10 am

Just read about a Staple's ad for an Acer 21.5" 1080p LCD monitor,
sale price ~$100 USD, one day only!

Says it has for inputs: 1xVGA, 1xDVI (DVI w/HDCP)

Based on my web research (see links below), this may work, yet not the best answer to my lusting for a new R-Pi display. The HDCP may prevent it from working with the R-Pi.

Any Video experts care to give an answer?
(Yes, it will work! || No, only give you problems || Maybe; buy it, try it, let us know )

http://www.staples.com/Acer-G2.....uct_403472

http://tv.about.com/od/hdtv/a/.....vihdcp.htm

Thanks in advance

jamesh
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Nov 07, 2011 12:19 pm

Quote from Bacan on November 7, 2011, 10:10
Just read about a Staple's ad for an Acer 21.5" 1080p LCD monitor,
sale price ~$100 USD, one day only!

Says it has for inputs: 1xVGA, 1xDVI (DVI w/HDCP)

Based on my web research (see links below), this may work, yet not the best answer to my lusting for a new R-Pi display. The HDCP may prevent it from working with the R-Pi.

Any Video experts care to give an answer?
(Yes, it will work! || No, only give you problems || Maybe; buy it, try it, let us know )

http://www.staples.com/Acer-G2.....uct_403472

http://tv.about.com/od/hdtv/a/.....vihdcp.htm

Thanks in advance


My understanding of HDCP is that if the source is encrypted, then the monitor needs to have HDCP, if the source isn't encrypted, it doesn't. The Raspi doesn't output encrypted when just using the display (Not sure about when playing back encrypted content - maybe), so the monitors doesn't need to support it , but it can have it.

Short answer, that monitor should work with the Raspi.
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obarthelemy
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Nov 07, 2011 1:00 pm

Will there be an 80 column mode, or will we be stuck at 65 ?

jamesh
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Nov 07, 2011 1:47 pm

I believe full colour (well, 16 colour) mode 2 on the BBC micro was 20x32. Now those characters are BIG.
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Contrary to popular belief, humorous signatures are allowed. Here's an example...
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ukscone
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Nov 07, 2011 1:54 pm

Quote from jamesh on November 7, 2011, 13:47
I believe full colour (well, 16 colour) mode 2 on the BBC micro was 20x32. Now those characters are BIG.



mode 3 was the best as it had lines on it to keep your writing straight :D

http://www.thecryptmag.com/Onl.....reens.html

Bacan
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Re: video modes? colour depth/resolution/aspect ratio/refresh, etc...

Mon Nov 07, 2011 4:59 pm

Quote from jamesh on November 7, 2011, 12:19
Short answer, that monitor should work with the Raspi.

Thanks for the answer.

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