[yt-users] How do you make movies?

Luigi Iapichino luigi at uni-heidelberg.de
Fri Sep 21 08:24:35 PDT 2012


Dear all,

for my movies I also used mencoder, with a more or less similar set of options 
to what Markus showed:

mencoder -mc 0 -noskip -skiplimit 0 -ovc lavc -lavcopts 
vcodec=mpeg4:vhq:trell:mbd=2:vmax_b_frames=1:v4mv:vb_strategy=0:vlelim=0:vcelim=0:cmp=6:subcmp=6:precmp=6:predia=3:dia=3:vme=4:vqscale=1 "mf://*.png" -mf 
type=png:fps=18 -o cluster-formation.avi

This was mostly found on the Web, and partly by tests, and I admit that I 
don't know or don't remember the meaning of most of these options.

I ran a simulation with a setup explicitly designed for generating the movie, 
namely producing ~ 500 data dumps. In this way, I could use 18 frames per 
second, which made the movie rather fluid. The outcomes are still in our 
Vimeo page!

Thanks for starting such an interesting discussion, I am eager to check your 
sets of commands and see if I get further improvements.

Cheers,

  Luigi

On Friday 21 September 2012, Geoffrey So wrote:
> Hi all,
>
> Playing around with mencoder and the mpeg4 codec, I think there's a hard
> limit to the width, if I set it to greater than w=2048, there will be
> artifacts in the movie (will not even encode 4096).  And the maximum
> vbitrate seems to be around 15000, anything higher I think it turns to the
> default and I'd get a lower quality video instead along with smaller file
> size.
>
> Found these out the hard way when I tried to stitch together two 2048^2
> images and encode it, each encode fine by itself but not when stitched
> together.
>
> Just thought people should know and keep in mind when using mencoder.
>
> From
> G.S.
>
> On Wed, Sep 19, 2012 at 6:37 AM, Brian O'Shea <bwoshea at gmail.com> wrote:
> > I actually just use Quicktime Pro, which has a very convenient GUI and is
> > actually quite flexible in terms of frame rates, image quality, export
> > format, etc.  The only odd thing is that Quicktime 10 can't be upgraded
> > to Pro, so one has to use an older version (7.6, I think).
> >
> > --Brian
> >
> > On Tue, Sep 18, 2012 at 6:07 PM, Nathan Goldbaum 
<nathan12343 at gmail.com>wrote:
> >> Hi all,
> >>
> >> I'm curious what sort of scripts, tools, and invocations thereof that
> >> people in the yt community use to stitch frames together into movies.
> >>
> >> It seems like there are a number of solutions to do this.  It would be
> >> nice if we could gather some solutions for this process and put them in
> >> the documentation or on the website so that future users have a place to
> >> start when they're trying to make their first movies.
> >>
> >> For what it's worth, here's a script I just wrote to process a bunch of
> >> slices and projections dumped by a timeseries script:
> >> http://paste.yt-project.org/show/2703/
> >>
> >> I've had good results with ffmpeg, although it's a pain to install and
> >> has an inflexible command line syntax to tell it to stitch together
> >> frames for a movie so I would love to hear of other solutions that don't
> >> use ffmpeg.
> >>
> >> Cheers,
> >>
> >> Nathan
> >> _______________________________________________
> >> yt-users mailing list
> >> yt-users at lists.spacepope.org
> >> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
> >
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-- 

---------------------------------------------------------------

Luigi Iapichino
Universität Heidelberg, Zentrum für Astronomie
Institut für Theoretische Astrophysik
Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
Tel: +49 6221 548983, Fax: +49 6221 544221
e-mail: luigi at uni-heidelberg.de
URL: http://www.ita.uni-heidelberg.de/~luigi/



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