On 2007-02-14 18:21+0100 Dominique MICOLLET wrote: > Hello > > I wish to use plplot to make simple physics animation (such as a mobile thrown > in the air) on a Debian Sarge. > The plplot version is 5.7.2, used with Fortran program. I can use C if > necessary. > > I need a set of images which will be used to feed ffmpeg. > > [...] I tried to use the pbm driver. I got a big > file, in which I guess the successive images are dumped. > But I don't know how to extract them.
To answer that question use one of the pnmto*** or pbmto*** applications. For example, I have just successfully used ./x01c -dev pbm -o test.pbm pnmtops < test.pbm >test.ps However, the results are really low resolution and not nearly as good as using -dev psc directly. Probably some maintenance of -dev pbm is required to get higher resolution, but it has been years since anybody worked on that device driver. > (1) Is there a way to drive the postscript driver to produce correctly > oriented graphs : mine are counterclockwise rotated. Use the -ori 1 option to rotate the postscript result the way you want, e.g., ./x01c -dev psc -ori 1 -o test.ps Use the -h command-line option to get help on lots of PLplot options. [out of order] > Currently I use the postscript driver (1) : a call to plenv() for each frame > put a new page in the > file. Then pstoimg gives me the set of images. > > I guess it is not the best way. Probably not. pstoimg converts postscript to either PNG or GIF images, but it is probably better to use our -dev png or -dev gif devices directly. You will need the familying option (which turns PLplot pages into separate files) since PNG or GIF formats have no concept of plot pages as produced by PLplot. Here is an example: ./x09c -dev gif -o test.gif -fam -fflen 3 ls test.gif.* test.gif.001 test.gif.002 test.gif.003 test.gif.004 test.gif.005 Our ninth example has 5 separate pages which the -fam option turns into 5 separate files. I have also shown the use of the -fflen option which (in this case) insures the numerical suffix is three characters (in case you have more than 100 pages). I assume ffmpeg would have no trouble converting a collection of gif images into a format suitable for animations, but I would be interested in exactly which end format you have chosen. After you finalize your PLplot-generated animation, I hope you post a link to it because I think many of us will be interested in the result. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Plplot-general mailing list Plplot-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-general
