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Re: Gif animations


Chronological Thread 
  • From: Giovanni Piredda <address@hidden>
  • To: address@hidden
  • Subject: Re: Gif animations
  • Date: Fri, 29 Jan 2021 16:50:52 +0100

On 29.01.21 16:17, Giovanni Piredda wrote:

(Following up)

I took a look at the C++ source code. I understand C++ quite weakly, maybe someone else can correct/complete what I write.

It looks to me like this.

The relevant files are

Typeset/Boxes/Animate/animate_boxes.cpp
System/Files/image_files.cpp

In image_files the function imagemagick_cmd is defined as

string
imagemagick_cmd () {
  if (has_image_magick()) {
#ifdef OS_MINGW
    static string image_magick_cmd=
      sys_concretize (resolve_in_path ("convert"));
#else
    static string image_magick_cmd= "convert";
#endif
    return copy (image_magick_cmd);
  }
  else return "";
}

and *I think* that on Windows before issuing "convert" one must also write the word "magick"

i.e. on Linux to convert the image gif_image.gif in the current directory:

convert   .\gif_image.gif +adjoin -coalesce .\gif_converted_%05d.png

and on Windows

magick convert   .\gif_image.gif +adjoin -coalesce .\gif_converted_%05d.png

(I found the format conversion string %05d in a forum, which I cannot find anymore)

If this is so, then this is the reason why it does not work on Windows.
I confirm that on Linux it works, as Jeroen said.

G.

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