Re: [ferret_users] pyferret and gif : make a movie

To: Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx>, Ferret pmel <ferret_users@xxxxxxxx>

Subject: Re: [ferret_users] pyferret and gif : make a movie

From: "Estanislao Gavilan Pascual-Ahuir (PGR)" <E.Gavilan-Pascual-Ahuir1@xxxxxxxxxxxxxxx>

Date: Fri, 21 Jul 2017 13:36:30 +0000

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Thread-topic: [ferret_users] pyferret and gif : make a movie

Hi Oliver,

I high recommend you to install Ubuntu using VirtualBox (everything is easy in linux). Anyway, I do gif using Gifsicle. So you can save 1000 gif images and merge them in a gif using this tool. I have just checked and it seems that gifsicle is windows supported. But I must confess that I use this tool in Linux and I do not know if it works that good in windows.

There is another way, but it takes a lot of memory RAM. You could use GIMP (like photoshop but free). In this case, you only need to load the picture an make an animation.

Kind regards,

Estanislao

From: owner-ferret_users@xxxxxxxx <owner-ferret_users@xxxxxxxx> on behalf of Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx>
Sent: 21 July 2017 13:39:42
To: Ferret pmel
Subject: Re: [ferret_users] pyferret and gif : make a movie

Due to the GIF copyright issues in the past, software and libraries to generate GIF files is pretty rare; most moved over to the PNG format long ago and gave up on GIF. And yes, PNG does not support the equivalent of an animated GIF. There are the MNG and APNG formats, but you don't see those very much (so not widely supported).

There are programs to generate movie files rom a series of PNG files. Suggestions I have seen, but never used, are avconvert (which comes with Macs), ffmpeg, programs from the ImageMagick package (which usually can be installed from package managers on Linux systems), and Movie Maker on Microsoft WIndows systems. The convert program in ImageMagick can be used to convert to GIF files, or it appears its montage program could make an animated GIF.

Karl

On Fri, Jul 21, 2017 at 2:03 AM, Olivier Marti <olivier.marti@xxxxxxxxxxxx> wrote:

Hi,

If I understand well the page http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/commands-reference/FRAME, pyferret won't make gif files. FRAME/FILE=foo.gif will produce a png file. My tests confirm this.

Is there a way to output gif files with pyferret ?

If not, how can I make a movie ? Do you know a way to make a movie from png files ?

Thanks,

Olivier

--

Dr. Olivier Marti - mailto:olivier.marti@lsce.ipsl.fr

Laboratoire des Sciences du Climat et de l'Environnement

Institut Pierre Simon Laplace

Laboratoire CEA-CNRS-UVSQ - UMR 8212

Tel : +33 1 69 08 77 27 - Mob : +33 6 45 36 43 74

Fax : +33 1 69 08 30 73

<http://www.lsce.ipsl.fr/Pisp/olivier.marti>

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
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