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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!kithrup!hoptoad!decwrl!mips!munnari.oz.au!manuel!sserve!ccadfa.cc.adfa.oz.au!apa
- From: apa@ccadfa.cc.adfa.oz.au (Alan P Arnold)
- Subject: Making QT movies from single-frame Insight images
- Message-ID: <1992Aug19.065725.22381@sserve.cc.adfa.oz.au>
- Summary: Making QT movies from single-frame Insight images - HOW?
- Keywords: Quicktime Insight movies snapshot
- Sender: news@sserve.cc.adfa.oz.au
- Organization: Australian Defence Force Academy, Canberra, Australia
- Date: Wed, 19 Aug 1992 06:57:25 GMT
- Lines: 53
-
-
- Hello again,
- perhaps someone out there can help with advice on this problem...
-
- I want to make a movie (Apple's Quicktime or VHS video for teaching
- purposes) of a series of single-frame screen snapshots of Biosym's InsightII
- images. Our SGI4D/20GT is not fast enough to rotate/move the types of images
- we want in real time, so real-time video capture is out.
-
- As an example to illustrate the task, assume I want to show a rotating
- CPK (space-filled) picture of a protein:
-
- The plan is as follows:
- 1. set up the molecule in Insight - CPK, color the Delphi electrostatic
- potential contours etc. <- impossible to rotate all this in real time.
- 2. with 'snapshot' running in another window, snap this screen image
- (not the entire screen) and save as a temporary snap.rgb (~0.5Mb).
- 3. For an eventual QuickTime movie, convert the .rgb to .pict with some
- image conersion utility eg. SGI's topict or one of the SanDiego
- Supercomp Center imtools (from sdsc.edu in /sdscpub/sgi4d/graphics).
- (For a video, my comp. center colleagues require Utah Raster format
- images, so convert .rgb to .rle instead of to .pict).
- 4. ftp snap.pict.001 to a MacII folder and hope you have enough diskspace.
- 5. rotate the image in Insight, and repeat steps 2-5 until finished.
-
- 6. On the Mac, use one of the Quicktime tools to convert all those
- PICT's to a PICS or MOOV, and voila.
-
- This should work OK, and for a few frames I could do all this
- manually. For *many* frames, most of this can be done from a
- macro, but...... How can I automate step 2?
-
- I don't think it is possible to run snapshot from the unix command-line,
- specifying the coords of the screen you want captured. Can anyone suggest
- an alternative utility to do this. (ipaste allows you to specify where
- you want to *place* an image, but icut doesn't).
-
- ... or is there a better way to do the whole thing?
-
- As an aside, is there a rule of thumb for how many frames one needs to
- capture for a 'smooth' rotation at a 'reasonable' rate?
- 360 one-degree rotations (frames) at 15 frame per sec = 24 sec
- playing time = one helluva big Mac file. Would 5degree rotations do?
-
- hoping you can help, because I suspect there are a few others
- out there who might also be interested....
-
-
- ----
- Alan Arnold | e-mail: apa@ccadfa.cc.adfa.oz.au
- Chem. Department,University College | voice : +61 6 268 8080
- Australian Defence Force Academy | fax : +61 6 268 8002
- CANBERRA ACT 2600 Australia |
-