Re: Help this fellow, re:Apple II and Video

[dalloff@freenet.columbus.oh.us (Dave Althoff)]

Toby Reiter (treiter@comet.net) wrote:
: Hope you guys can help this fellow out! (He originally posted to
: comp.sys.apple2.comm):

:  In article <4hg92s$rh5@news.nde.state.ne.us>,
: bucklest@panesu.esu14.k12.ne.us (Tigh Buckles) wrote:
:     >Help!!:  
:     >I have an Apple IIGS and I want to do some creative editing to a video:  
:    >tape I made!  But I have no idea how!  First of all what exactly do I:  
:     >any paint program work like Platinum Paint?? Please Help Me!!!:  
:     >I would appreciate any advice on doing this!!:  
:     >Thanks!!!
: I already told him about the existence of the Apple II Video Overlay Card,
: but I don't really know the card's abilities or about the availability of
: software.

Okay, since I am a video professional myself, perhaps I can offer some
assistance 8-)

First of all, if you are planning on using the ][gs to actually *do* the
editing, I think you're up a creek.  Sorry...to do the editing, get
yourself (access to) a good editing system, or barring that, do
crash-edits with a pair of videotape machines.  If you need details on
that procedure, let me know.

Second, if you just want to add graphic images to the videotape, the Apple
is a great machine to use.  The output from the coax video out jack on the
back of the IIgs is really close to standard NTSC video.  You lose a bit
of clarity running through a TV set instead of an RGB monitor, but it's
fine for most 640x200 or 320x200 graphics.  Simply run an RCA-type cable
from the GS video output to the video input on virtually any VCR, and you
can record the screen image.  Note that the background and border color
control panel settings do not affect this video output.

If you're using an "on-line" video editing system, you'll need to run the
IIgs video output through a frame-sync or time-base corrector in order to
sync the signal with a switcher, but it doesn't sound like this applies to
you.

If you are lucky enough to have a Video Overlay Card, you have additional
options open to you.  All the card does is to allow you to superimpose
IIgs graphics over live video.  It does not actually capture video, but it
does allow you to, using the included "Videomix" software, "key out" any
color you like from the computer image, and super the remaining colors
from the computer image.  You can even control the transparency of the
computer image.  It's a neat piece of hardware!

So, to sum up...
Anything you can display on the screen, from any program, you can record
full-screen on videotape.  Note that the IIgs screen is considerably
smaler than the video image.

With the Video Overlay Card, you can superimpose computer graphics from
the IIgs over other video sources, such as "lower-third" tags on talent.

--Dave althoff, ][.
  Studio Manager, Capital University Television (dalthoff@capital.edu)
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