VGA 2 Composite.

[therock003]

Ok so i have an asus eee umpc that has a vga-out port which i want to utilize and connect to an old tv that has only scart and/ or video (yellow connector) input.

I was told that since the eee doesnt support tv-out a plain vga2video converter like the ones you get on the ebay for under a buck wont do.You know like these:

http://search.ebay.com/vga-composite_W0QQ

-Will it really not do?

So i was told to go for a vga box instead.I mean its a simple analog to analog signal transfer (as far as i'm concerned) so y should a plain vga2rca not do,and i would have to go for the expensive vga box instead?Is the for the color model?VGA outputs rgb,and well the tv input,i dont maybe yuv?

Is it the rgb2yuv conversion that probably needs to happen that requires a vgabox?

Can i get a better deal than 70 euros?Cause that's what ivve been told on an electrics store here on Greece.

And finally,and this one's important,will the ouput be any good?

I mean i've tried on the past an svideo2scart video transfer -not good,like at all,lots of flickering and dots all over the place,and i then tried an s-video2s-video directly and it was as good as the tv's resolution would get.Means not that good since it was a 480p tv i think but what the hey,the picture was clear of noise,though a little blurry,but no dots and no noise or whatever.

so hey will you give me a hand on this one?Appreciate it. 8)

[jagabo]

VGA is completely different than composite or s-video. Cheap VGA to composite or s-video converters will get you very poor results. Expensive VGA to composite converters will give you poor results. Simulated example of a good converter:

https://forum.videohelp.com/topic345015.html#1849172

A bad converter will have lots of noise too.

But wait -- doesn't SCART support RGB? Maybe there's some way to convince the computer to output RGB with the right timing and sync pulses for PAL video.

[edDV]

Don't expect much quality. VGA RGB to S-Video is not an analog process. It needs a scan converter. That means high cost and low quality.

The unit itself is limited to ~720x576 (real world 640x480) over VGA due to weak Celeron M processing.
http://www.anandtech.com/mobile/showdoc.aspx?i=3166&p=7

You are in a box. A 640x480 "VGA box" scanconverter will get a poor picture. A digital TV with VGA input will upscale to a slightly better picture.

[jagabo]

Here's a DIY project for VGA to SCART RGB:

http://www.idiots.org.uk/vga_rgb_scart/index.html

It requires that the graphics card be able to output at the right scan rate for TV. Most graphics chips are very flexible and can probably do this. But getting them to is the problem.

[edDV]

Here is an actual 800x600 to S-Video out (ATI-9550) to S-Video in (Canopus ADVC-100) frame cap. A scan converter will produce lower quality than these idealized captures.



A DVD playback.


I don't think these results are worth the investment. Put the money into a new digital TV with VGA input.

[therock003]

Hi guys first off i dont need vgatosvideo but vga2video(rca) or scart.The old TV i'm refering to doesnt have an svideo input.

I saw the photo you posted as an approximate on the other thread and i cant say its bad.Well its bad for paying the money for the box,but not bad considering the use i want it to be.

What i want to do is output whats on my laptop to my old tv on my summerhouse.

And with the output maybe i'll get some light excel editing,and like browse a few xvid files low resolution style.Even laptops resolution is low (800x480) so i dont thing i've got anything to loose except money.

Other than diy cause i'm really not good at these,what other deals can i get?Is 70 euros for a vgabox too musch?Can i do one better?

EDIT:I also saw the new ones after i posted and they arent bad.Look i already have a desktop pc with radeon 3870hd with dvi-out and whenever i wish i can get an hdtv monitor.But that's not the case.

Here all i want to do is have some basic tv-out functionality for my ultra portable laptop when i go to my summerhouse,or even when i'm at a friends.I dont hope for hi end stuff cause i realise it's just not happening!

[edDV]

Hi guys first off i dont need vgatosvideo but vga2video(rca) or scart.The old TV i'm refering to doesnt have an svideo input.

I saw the photo you posted as an approximate on the other thread and i cant say its bad.Well its bad for paying the money for the box,but not bad considering the use i want it to be.

What i want to do is output whats on my laptop to my old tv on my summerhouse.

And with the output maybe i'll get some light excel editing,and like browse a few xvid files low resolution style.Even laptops resolution is low (800x480) so i dont thing i've got anything to loose except money.

Other than diy cause i'm really not good at these,what other deals can i get?Is 70 euros for a vgabox too musch?Can i do one better?

EDIT:I also saw the new ones after i posted and they arent bad.Look i already have a desktop pc with radeon 3870hd with dvi-out and whenever i wish i can get an hdtv monitor.But that's not the case.

Here all i want to do is have some basic tv-out functionality for my ultra portable laptop when i go to my summerhouse,or even when i'm at a friends.I dont hope for hi end stuff cause i realise it's just not happening!

Cheaper to buy a used 800x600 to 1024x768 CRT computer monitor (VGA input). The picture will be better and cost will be far less.

This class of computer monitor is in the garbage pile over here. The recycle centers want money to take it due to lead. You may be able to find a good one for free. Companies are paying to get rid of them.

PS: Don't expect the quality above from a scan converter. It will be worse. A VGA computer monitor will be better.

[therock003]

So i should look at recycle centers?Fat chance,at least here on Greece,and even if i find one,then there's the portability issue.lDunno,the only thing i know for sure,is that i'm sc**ed with this vga output.

Anyway technically i still havent figured out the use of the scan converter.What does it need to convert?

[edDV]

So i should look at recycle centers?Fat chance,at least here on Greece,and even if i find one,then there's the portability issue.lDunno,the only thing i know for sure,is that i'm sc**ed with this vga output.

Anyway technically i still havent figured out the use of the scan converter.What does it need to convert?

800x600 or 640x480 VGA 60Hz in, then composite PAL 625/50Hz out.

The converter will list allowed input resolutions but your laptop can't calculate playback above 640x480 to 800x600 without lost frames.

[therock003]

Also what's with the colour scheme.VGA uses RGB but TV?So what colour conversion will be made?

Also one last thing.What about an amplifier?I was thinking of getting one for my future audio equipment.I might as well use the video inputs/outputs.Connect the laptop vga->vga or dvi dont know which one better and the output from the amp to the TV?How about that?

Of course i want buy an amplifier for this reason cause that's insane,but if i ever buy one,for some audio need.will that help for this problem as well?

[edDV]

RGB 800x600 60Hz. in to scan converter
Scan converter converts to 625/50 line analog YUV and modulates that to standard PAL.

Amplifier won't help video.

[therock003]

Amplifier wont help video at all?But it has so much built for it.How can it not process and amplify the signal into whats best for an occasion?

[jagabo]

Inside the SCART connector are composite, S-video, and RGB signals. Not all devices support all three.

Here's an example of a commercial VGA to SCART product:

http://www.bhphotovideo.com/c/product/517897-REG/Gefen_ADA_SCART_2_VGA_VGA_to_SCART_Adapter.html

You still have to come up with the custom settings for the graphics card.

Using a scan converter for watching DVD or lower quality video is acceptable.

[edDV]

Amplifier wont help video at all?But it has so much built for it.How can it not process and amplify the signal into whats best for an occasion?

I've never seen an A/V amplifier with VGA inputs.

[jagabo]

Amplifier wont help video at all?But it has so much built for it.How can it not process and amplify the signal into whats best for an occasion?

I've never seen an A/V amplifier with VGA inputs.

And if you find one it will likely only pass the VGA through, not convert it to composite or s-video. As far as video is concerned, most A/V recievers are nothing more than dumb switches. Of course, you can use the audio portion to drive some nice speakers.

[therock003]

Well i was think of a vga2dvi cable.Do the amps have dvi,or maybe even use a different cable that when inputs on the av the signal will be amplified?

If not then that concludes this discussion.

[jagabo]

DVI has the option of carrying analog RGB. All those VGA2DVI cables do is connect the RGB pins on the VGA connector to the RGB pins on the DVI connector. There is no conversion taking place.

I've never heard of an A/V receiver with DVI switching. But my experience in that area is not vast. A/V receivers don't amplify the video. They just switch input and outputs.

[therock003]

If that's true then there really is no way to get anything out of vga when it comes to an old composite tv.Not even the hard way i guess.

Well anyway if that's the case then this converation has finally reached its limits,and i would like to thank you all for participating.

[jagabo]

If your TV has a DVI-I connector it may accept RGB over DVI.

http://www.interfacebus.com/Design_Connector_Digital_Visual_Interface_DVI_Bus.html

[therock003]

Well it hasnt,its a scart-only piece of scrap. : (

[edDV]

Options

1. Use a computer monitor with VGA in.
2. Use a VGA to composite scan converter (poor quality).
3. Buy a new TV with VGA input.
4. Buy a new laptop with TV out (composite PAL or S-Video).

Good luck.

[therock003]

Oh yeah i forgot,ma laptop also supports wlan.Is there any way to stream video via wlan to an external device that can then connect via rca/scart or whatever to the tv?

[edDV]

Oh yeah i forgot,ma laptop also supports wlan.Is there any way to stream video via wlan to an external device that can then connect via rca/scart or whatever to the tv?

No, you can stream video over a lan but you would need a computer, DVD player or server at the TV with eithernet in to video out.

[therock003]

actually i have a noki n93i mobile with wlan and upnp,and also tvout support,How will i get video streamed there and use the mobile video out?

Question.Is it going to be strenous for the mobile?I mean the decoding is going ot be done on the laptop and then streamed right?Cause mobile doesnt have all this processor power to carry one serious decodings of files.

[jagabo]

Question.Is it going to be strenous for the mobile?I mean the decoding is going ot be done on the laptop and then streamed right?Cause mobile doesnt have all this processor power to carry one serious decodings of files.

So you want to stream uncompressed video from your computer to your cell phone via a wireless connection? Standard definition video, 720x480, 30 fps, YUY2 will require about 165 Mb/s sustained throughput. High def 1280x720, 24 fps, YUY2 will require about 350 Mb/s sustained throughput. Non-film High def 1280x720, 60 fps, YUY2 will require about 885 Mb/s. Ain't gonna happen.

You're going to need a smart device that does all the decoding at the TV end. Then your computer is just a file server. Something like the Popcorn hour or a Dlink DSM-320.

I don't agree that a 64 MB graphics card can't produce acceptable HD video though. Even 1920x1080 RGB is only about 6 MB/frame. Use triple buffering and you have 18 MB of video storage. But a 64 MB graphics card may likely be an older card with less hardware support for video. When using your laptop's VGA outout make sure you have video overlay enabled on your graphics card so at least the graphics chips can use whatever video acceleration and processing it has.

[edDV]

actually i have a noki n93i mobile with wlan and upnp,and also tvout support,How will i get video streamed there and use the mobile video out?

Question.Is it going to be strenous for the mobile?I mean the decoding is going ot be done on the laptop and then streamed right?Cause mobile doesnt have all this processor power to carry one serious decodings of files.

Lower bit rate wmv would work. Lower the resolution and bit rate until you machine can encode to lan real time. 320x240 @ ~ 256Kb/sec will work. Start small and work up until it skips.

Read Baldrick's tutorial on Windows Media Encoder.