[comp.sys.amiga] VCR Recording Non-Interlace Screens

sutherla@qtp.ufl.edu (scott sutherland) (10/09/89)

	Before I ask my question, here is my hardware/software 
configuration:

	Amiga 2000 (1 Meg RAM)
	CMI VI500 Encoder
	Cheap RCA VCR (4 Heads, MONO)
	Generic Phono Cables
	Several public domain SA3D and VS Anims
		with their respective anim player
		programs.


	Okay, I wanted to record some Amiga stills and anims to show as
a demo for a graphics class I was taking. I recorded several Turbo Silver
stills, a Ham picture of Spock, several anims (CAR, Berserk, Rocker, 
Juggler, and a few others. I also recorded the NewTek Demo Reel I in
its entirety. When I looked at the final tape, I was pleased, considering
the quality of the VCR. 

	So what's the problem, you might ask. (I hope so :^)) Well,
I recently got the program AniMagic, and I was planning on recording
several images and image transitions (called DVE's in AniMagic: e.g.
fades, page turns...) to a tape for another demonstration. I decided
to use some of the images from the NewTek Demo Reel I, since they are
very colorful. I loaded the picture of the girl with the hat and scarf
into AniMagic. Well, one of the bits of information given to you by the
program is the resolution of the image, in the format:

	Width x Height x Bit Planes x # Frames (1 if not an animation)

Well, to my surprise, this image has only 200 lines in the height field.
I noticed that several others from this demo also have only 200 lines.
Then I tried to load CAR and Berserk, but neither of them will fit. 
However, when I looked at them using the player program, it appears that
they are also NOT INTERLACED!!!

	Now my question: HOW WAS IT POSSIBLE FOR ME TO RECORD THESE 
IMAGES AND ANIMATIONS WHEN THEY ARE NOT INTERLACED???????

	Being able to record non-interlaced images would be a miracle
for me, since most of the images I have from demo disks and slide show
programs (e.g. dpslide) are NON-INTERLACED. I would appreciate any help
for this. I do not feel like spending 20 hours making a 5 minute anim
of video effects from AniMagic, only to find out that, using the player
DiskAnim to play the multi-Megabyte anim, I cannot record it to tape.


Thanks,

Scott Sutherland
sutherla@qtp.ufl.edu

new@udel.edu (Darren New) (10/10/89)

In article <702@orange6.qtp.ufl.edu> sutherla@orange6 (scott sutherland) writes:
>	Now my question: HOW WAS IT POSSIBLE FOR ME TO RECORD THESE 
>IMAGES AND ANIMATIONS WHEN THEY ARE NOT INTERLACED???????

It is perfectly possible to record non-interlaced images onto the VCR.
(I have an A1000, so it may be slightly different...)
However, recording a non-interlaced frame onto my VCR gives me 
black lines on the odd (or is it even?) scan lines.  Yucko..

Solution:   Run SetLace first.  This causes Intuition to open all
future screens in interlace mode.  If there are only 200 scan lines,
then each scan line will be repeated twice, once in each frame.
It takes no additional memory as the same screen bitmap is just reused.
If you need SetLace (it's PD and verrrrry old...) let me know.
Our mailer is broken right now (hence the followup) but eventually
I'm sure someone can get it to you.   -- Darren