[yt-users] How do you make movies?

[Matthew Turk]

Hey Anthony,

Figuring out how to use the matplotlib movie maker (which I think uses
subprocess) would be REALLY cool. I think right now it relies on callbacks
and can't assemble from filenames. I think that would work in serial, but
getting it to assemble from filenames might get it to work in parallel...
If I can help with this, let me know. This would be a great way to leverage
matplotlib cleverness!

Matt
On Sep 21, 2012 4:01 PM, "Anthony Scopatz" <scopatz at gmail.com> wrote:

> 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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