#The PAR and Aspect Ratio
6 messages in this thread
I've been having some trouble with the technical areas of aspect ratios in
regard to the PAR's requirements.
I use a 512×486 with an aspect ratio of 1.23 with my targa. This setup with
the PAR is not wide enough. The PAR manual says that It (The PAR board) will
append the 756×480 resolution to the image. So I made the image @ 756×480 with
an aspect ratio of 1.0. This looks the closest to correct but a consideral
amount of my image is lost off the screen. Even less than what is guestimated
by the safe frame feature in 3DS.
My first question is "what is the correct resolution and aspect ratio to use
with the PAR?"
Secondly, I thought I could use my regular old VHS deck to make myself some
demos for distrubution, but I cannot seem to record to it. I am using the NTSC
output from the PAR through a converter to RCA into my VHS. The monitor is
displaying at the same time using a S-video jack. Any suggestions?
Thanks, NDC
Re-consult your manual. The PAR requires a frame size of 752X480X0.851. The
aspect ratio must be 0.851 to yield distortion free geometry on a 1.33 aspect
ratio NTSC TV screen. You plug in these figures in 3DS and everything will be
fine. Every frame buffer has its own specs for resolution and AR. What works
for the Targa+ will not work for most other frame buffers.
Thanks for the info. I was curious, but I did not know that the AR for a NTSC
TV screen was 1.33. While I sincerely appreciate the assistance I have been
receiving from you rendering guru's, I would just as readily have access to the
info myself. Can you direct me toward some publications for novices regarding
things of this nature? Perhaps in the future I could be helpful to others.
NDC
The Par will output SVHS (Y/C signal) simultaneously as composite video. Just
hook up either wire between your PAR and your VHS deck and be sure you have the
appropriate input selected on the VHS deck. Hook up a video cable from the VHS
deck's output to the monitor.
Thanks for your help. I discovered that my recording problem was a result of
one of those insanely difficult to use VHS recorders. Basically, I have to
tell my deck which of the inputs I will be using or it defaults to the co-ax in
the back. (there are three input jacks on this VHS recorder).
FWIW….Some Consumer Decks Require that you put on the Simucast option. Not
sure of the Spelling there. <g>
Murph'