[Linux-aus] Open source hardware for open source conference recording - now launched!

[Tim Ansell]

On 26 September 2015 at 11:49, Adam Nielsen <a.nielsen at shikadi.net> wrote:

> > The Opsis is flexible and powerful enough to have a large number of
> > use cases, many of which we probably haven’t considered.
>
> This is really interesting!  Is there any way the board would be able
> to record a VGA signal?  Many older PC demos[1] won't work in emulators
> like DOSBox, so recording a video of them for posterity is a bit
> difficult without a VGA capture device.  I tried using an old (cheap)
> Avocent KVM-over-IP box to capture the VGA signal but it can't handle
> the framerate and applies too much compression to the signal anyway.
>
> I guess if the board lacks analogue inputs, you could use a VGA to
> DisplayPort adapter?  I'm not sure if these exist though - they all
> seem to convert DisplayPort to VGA, rather than converting VGA to
> DisplayPort.
>
> I've also seen a few projects (mostly arcade related) attempt to
> convert older CGA/EGA signals into VGA or HDMI, with some success, to
> replace aging CRT screens with newer LCD panels.  With suitable
> software, would this board be able to accept the six or so TTL signals
> from a CGA/EGA board and then generate a DisplayPort/HDMI signal from
> that?
>
> Thanks,
> Adam.
>
> [1]:
> http://www.pouet.net/prodlist.php?platform[0]=MS-Dos&page=1&order=views
>

The quickest way would be to use VGA would be to get a cheap VGA->HDMI
adapter. These are relatively cheaply available from places like
Amazon.com, DealExtreme, etc. They greatly vary in quality with no
relationship between the quality and actual price of the adapter. I don't
actually have much experience with them but others have used them
successfully.

We do have plans for a VGA board. A summer of code student created a VGA
board for our old prototyping board (you can see it at
http://github.com/timvideos/HDMI2USB-vmodvga). He is currently looking at
porting the board to the TOFE connector and will hopefully have something
to show for it soon.

As an open source project, we of course value contributions! If you are
interesting in working on this type of thing, please do join our mailing
lists (http://groups.google.com/forum/#!forum/timvideos/join and
http://groups.google.com/forum/#!forum/hdmi2usb/join) or say hi on IRC
(irc://irc.freenode.net/#timvideos).

Hope that helps!

Tim 'mithro' Ansell
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