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Re: creating movies from simulation output



Matteo,

You could try ppmtompeg (which incidentally is used to convert pnm
files into mpeg, but don't worry about that).

Attached is a wee python script I wrote ages ago to automatically
write the .params file needed by ppmtompeg and then to call ppmtompeg
to create the movie.  I hope it is useful and helps to answer your
question.

Regards,

Paul


On 07/05/07, Matteo Semplice <semplice@mat.unimi.it> wrote:
Dear everybody,
 I am wondering whether anyone has already come up with a decent solution to
the following problem.
  I have a rather complicated simulation code that outputs 3D data for a
time-dependent problem. I transform the data into frames (using opendx, "dx"
package) and next I want to assemble them into a movie. Currently the frames
are .miff files, but opendx can write into zillions of formats, so I can
easily change this. On the other hand I do not want to give on opendx to
handle the visualization.

It is critical that the movie should contain my frames (say frame001,
frame002, etc) at no more than 5 frames per second. Hence a dumb run of
ffmpeg creates movies that run too fast.
Up to now I do "convert frames00* -delay 15 movie.gif" and create an animated
gif. This however crates a really huge file and it also seems to raise
compatibility issues when used under a third party O.S. which I don't name...
(I cannot chose the OS of the pc at the hosting institution, when I give a
presentation!)

So, here are my questions:
1- which movie format should I use to have maximum compatibility whilst taking
advantage of compression? (Ideally it should be usable with \movie from LaTeX
beamer)
2- what's the best tool to create movies of the above format, at a chosen
frame rate?

Matteo

--
Matteo Semplice
Dip. di Matematica - Via Saldini,50
Tel: 02 50316170 (Int 16170)


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Attachment: make_movie.py
Description: Binary data


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