[yt-users] How do you make movies?

[Anthony Scopatz]

Hi All,

I also use memencoder, The only problem I have had is that it doesn't seem
to be playable natively (ie w/out VLC) n MacOSX.  It would be nice to
cobble together an API for subprocessing movie making based on time series.
So I agree with Nathan's sentiments.  This has been on my list of things to
work on in my ample free time ;).

Be Well
Anthony

On Fri, Sep 21, 2012 at 11:32 AM, John Wise <jwise at physics.gatech.edu>wrote:

> Hi Geoffery and everyone else,
>
> I usually use avconv (the replacement for ffmpeg) to make movies, which
> doesn't have the limitation of a maximum variable bitrate.  Here is the
> command I use.
>
> avconv -r $fps -f image2 -i frame_%04d.png -b 160M $output
>
> which uses the mpeg4 codec by default with a bitrate 160 Mb/s, and you can
> go even higher than this.  I used this for a 8k x 5k pixel movie.  Anything
> lower gives you serious compression artifacts for such a high resolution.
>
> I'd imagine that you can get fancier with variable bitrates and other
> options, but this spartan command gets the job done.
>
> John
>
> On 21 Sep 2012, at 01:59, 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
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> --
> John Wise
> Assistant Professor of Physics
> Center for Relativistic Astrophysics, Georgia Tech
>
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