Re: Video Overlay Card

[dempson@actrix.gen.nz (David Empson)]

In article <199408270603.CAA26313@bottom.magnus.acs.ohio-state.edu>,
Radagast <tschmidt@magnus.acs.ohio-state.edu> wrote:
> What good is a Video Overylay Card on a IIGS?  I may be able to get
> one for a decent price.  So what would I be able to do with it?

The Video Overlay Card is a video mixing device: you can combine an
input video signal with computer-generated video, and output that to
another device.  To make full use of it, you probably need two video
recorders, or at least a video camera and a recorder.  You could do a
reasonable amount with a video camera or recorder and a monitor on the
output, but idealy you should use a video recorder on the output.

The most obvious use of it is to add computer-generated subtitles to a
video.

> What software makes use of it?

Any software that uses super hi-res mode (and other modes?)  Some
programs are better than others.  In particular, 320 mode works better
than 640 mode, and it helps if you can generate large areas of the
same colour on the screen, since the VOC operates on a "key colour"
scheme - the key colour becomes transparent, allowing the video source
through.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand