| MPEG Movies from IDL [message #3591] |
Thu, 16 February 1995 11:34  |
franz
Messages: 3
Registered: February 1995
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Junior Member |
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I would like to make some animation sequences available on the WWW. Does
anyone have an IDL program to write MPEG files?
Thanks,
Bryan Franz
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| Re: MPEG movies [message #7480 is a reply to message #3591] |
Sat, 16 November 1996 00:00  |
Christian Soeller
Messages: 46
Registered: August 1996
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Member |
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"A. Scott Denning" <scott@abyss.atmos.colostate.edu> writes:
> The idl program would be identical. The only differences would be in
> regard to the changes in the use of mpeg_encode (which is a freeware
> utility) on DOS vs Unix.
I guess you also have to change the code that uses Unix shell commands.
In using Scott's program I came across some minor problems which I hope to
have fixed in a slightly modified version (see diff output):
The shell syntax that tests for existance of TMPDIR is csh style. I changed
it to sh style and called SPAWN with the /SH flag to make it run under most
unixes (for other platforms someone has to write an OS if-clause). The syntax
of the INPUT line in the parameter file for mpeg_encode seems to have changed,
at least it choked on my machine (running IRIX 6.2). It should work now with
the current mpeg_encode version (v1.5b). Finally, a switch to delete the
temporary filetree after completion has been added.
diff (1) output:
1c1
< PRO WRITE_MPEG, mpegFileName, image_array
---
> PRO WRITE_MPEG, mpegFileName, image_array, delaft=delaft
15c15
< SPAWN, 'if (-d ' + TMPDIR + ') echo "exists"', result
---
> SPAWN, 'if test -d ' + TMPDIR + '; then echo "exists"; fi', result, /SH
41c41,42
< PRINTF, unit, '`ls *.ppm`'
---
> PRINTF, unit, 'frame.*.ppm ['+string(FORMAT=formatString,0) + $
> '-' + string(FORMAT=formatString,nFrames-1) + ']'
55a57,59
>
> IF KEYWORD_SET(delaft) then $
> SPAWN, 'rm -r ' + TMPDIR
Best regards,
Christian
------------------------------------------------------------ --------
Christian Soeller mailto: csoelle@sghms.ac.uk
St. Georges Hospital Medical School Dept. of Pharmacology
Cranmer Terrace London SW17 0RE
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| Re: MPEG movies [message #7488 is a reply to message #3591] |
Fri, 15 November 1996 00:00 |
A. Scott Denning
Messages: 5
Registered: July 1996
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Junior Member |
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TOP member wrote:
>
> The other day there was a question about how to generate MPEGs on a Unix. Does
> anyone know a simular program in IDL for a windows95 based platform?
The idl program would be identical. The only differences would be in
regard to the changes in the use of mpeg_encode (which is a freeware
utility) on DOS vs Unix.
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