Video capture??
31-Jan-94 22:55:05
Sb: #129938-Video capture??
Fm: Thomas Harmon 72740,2261
To: E. BUD WERTHEIM 72603,734
No you don't need to buy the converter to get 24-bit iff files. the DCTV box
plugs into the normal 23 pin monitor jack output of the amiga. It also plugs
into the parallel port where the printer is usually hooked up. The DCTV unit
has to video jacks on it. one in, one out. Thes jacks are what they call
"phono" jacks and all VCR's and camcorders have them. the video camera would be
connect to DCTV's input video jack, and the output video jack would be
connected to a "composite" monitor.. that is a monitor that has an video phono
jack input. Most new tv's have this capability but if you have a VCR you can
plug into it's phono jacks run an older tv on channel 3,4(usuallt there's a
button like "video/ant" or something.)
The paint program or the digitize program when run will put up a greyish
picture on the computer's monitor, but put up a nice display on the Composite
monitor (or tv). This is the monitor you use to do everything on (you could
shut off the amiga's monitor at that point, if you so desire).
The converter is a beast that allows the display to come up on your normal
amiga's monitor, you don't need another monitor, or tv, and because your
monitor is better than an off the shelf tv, it looks better!
When you run the digitize program, video from the video-camera will be
displayed on the composite moniter. when you grab the photo, you can change
parameters (brightness,sharpness,color,etc.) and save the picture in DCTV's
format,OR 24 IFF format.. ADPRO or equivalent can the convert the 24-iff format
and translate it to GIF….
The DCTV does not really capture a 24-bit image.. A video camera puts out only
about 3900 colors and has a resolution of approx 640ish by 300 lines (NOT
talking about Hi-8 or S-VHS, but a normal "composite" camera. This resolution
is what DCTV captures and does a decent job. It cannot really capture stuff of
pre-recorded tape though, if you have a really decent pause feature on the tape
sometimes it will work..
All video capture boards, including the ones on the PC, using the composite
video input will limit you to this reslution. (TV's composite is called NTSC in
the usa, and PAl in Europe).
if you need finer resolution, an photograph of the object can be scanned in
using an "scanner" (good name, huh!) The scanner usually has about 300 x 300
reslution per INCH and will give a much sharper image than any video capture
device.
A slow scan TV can be much finer than NTSC composite video as that's what they
used for all those NASA pics on mars, the the voyager probes.
Boy what a long msg! You might whant to pic up the mag "desktop video" as it
covers IBM,MAC, and still AMIGA video cards!
Hope this helps more than it confuses! -Tom-