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'[EE]: snapshot video or slower update'
2006\01\06@125312 by Gus Salavatore Calabrese

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I stumbled upon the Matrox DualHead2Go and I started thinking:
http://www.matrox.com/graphics/offhome/dh2go/home.cfm

Would an FPGA support taking snapshots of XVGA video passing
though it and put it on another screen ?  Thus one could have a number
of monitors that worked from one video card and could show different
video images.

This might be great for laptops that often cannot have expanded video
capabilities.

AGSC

2006\01\06@133459 by Herbert Graf

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On Fri, 2006-01-06 at 10:54 -0700, Gus Salavatore Calabrese wrote:
> I stumbled upon the Matrox DualHead2Go and I started thinking:
> www.matrox.com/graphics/offhome/dh2go/home.cfm
>
> Would an FPGA support taking snapshots of XVGA video passing
> though it and put it on another screen ?  Thus one could have a number
> of monitors that worked from one video card and could show different
> video images.
>
> This might be great for laptops that often cannot have expanded video
> capabilities.

It's an interesting idea, but there are "USB video cards" out there.
They plug into your USB port, enumerate as a regular video card, and
have VGA output. Very simply way of adding duel head to any system.

Being only USB2 the screen updates are NOT as fast as a real video card,
but for something like a datasheet or email it's supposedly more then
enough.

TTYL

-----------------------------
Herbert's PIC Stuff:
http://repatch.dyndns.org:8383/pic_stuff/

2006\01\08@183639 by andrew kelley

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On 1/6/06, Herbert Graf <spam_OUTmailinglist2TakeThisOuTspamfarcite.net> wrote:
> On Fri, 2006-01-06 at 10:54 -0700, Gus Salavatore Calabrese wrote:
> > I stumbled upon the Matrox DualHead2Go and I started thinking:
> > www.matrox.com/graphics/offhome/dh2go/home.cfm
> >
> > Would an FPGA support taking snapshots of XVGA video passing
> > though it and put it on another screen ?  Thus one could have a number
> > of monitors that worked from one video card and could show different
> > video images.

True you could do that, but how would you trigger the snapshot?
Perhaps you could do it if you could control a few pixels in one
corner of the screen I suppose (in pc-side software)..  Would make a
nice toy, but would have serious framerate issues in all likelihood.

--andrew

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