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- Path: sparky!uunet!olivea!sgigate!sgi!fido!hailwood.asd.sgi.com!spencer
- From: spencer@hailwood.asd.sgi.com (Paul Spencer)
- Newsgroups: comp.sys.sgi
- Subject: Re: Animation and Genlock questions
- Message-ID: <1isuqdINNi6f@fido.asd.sgi.com>
- Date: 11 Jan 93 23:11:09 GMT
- References: <1ismskINN371@tamsun.tamu.edu>
- Organization: Silicon Graphics, Inc., Mountain View, CA
- Lines: 34
- NNTP-Posting-Host: hailwood.asd.sgi.com
-
- n303bn@tamsun.tamu.edu (Jason Rosson) says:
- >
- > He wants to do some type of computer animation,
- > but does he need a VTR? Or is there some way to play the frames fast
- > enough without one.
-
- A VTR is usually used, since it (a) is convenient storage, and (b) lets
- you send your animations to other people. However, you could animate
- your frames and save them to disk; then to play them back, you'd have
- to read them all into memory and blast them to the graphics screen (via
- lrectwrite()) as fast as possible. There are a few drawbacks: you need
- about 27 megabytes of RAM per second of animation you want to see; you
- need a lot of extra disk storage; and you aren't garanteed to view the
- animation `real' time.
-
- On the other hand, you can reduce the resolution, and reduce the number
- of frames per second, something you can't do with a VTR.
-
- > Secondly, how does the genlock port on the back
- > of the machine function. Does it go in, out or both ways?
-
- It is an input. If you are trying to synchronize several Irises together,
- or synchronize your Iris to some external video equipment, you'd use this
- input. See the setmon(3G) man page, especially the -g flag.
-
- > When I try to use the Genlock Confidence Test it tells me I have no hardware
-
- That test is for the CG2/CG3, older hardware that you don't have (or need).
-
- ....paul
-
- --
- Paul Spencer Silicon Graphics Advanced Graphics Division
- spencer@sgi.com Mountain View, California
-